The following commit has been merged in the master branch: commit ee276fa4f314c1deb5b6a605d0ed844867e1e5bb Author: Jason A. Donenfeld Jason@zx2c4.com Date: Sun Oct 9 20:44:02 2022 -0600

treewide: use get_random_u32_below() instead of deprecated function

This is a simple mechanical transformation done by:

@@ expression E; @@ - prandom_u32_max + get_random_u32_below (E)

Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Acked-by: Darrick J. Wong djwong@kernel.org # for xfs Reviewed-by: SeongJae Park sj@kernel.org # for damon Reviewed-by: Jason Gunthorpe jgg@nvidia.com # for infiniband Signed-off-by: Jason A. Donenfeld Jason@zx2c4.com

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index a2b31d91a1b6..f811733a8fc5 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -371,7 +371,7 @@ static unsigned long sigpage_addr(const struct mm_struct *mm,

slots = ((last - first) >> PAGE_SHIFT) + 1;

- offset = prandom_u32_max(slots); + offset = get_random_u32_below(slots);

addr = first + (offset << PAGE_SHIFT);

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 044a7d7f1f6a..1395a1638427 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -591,7 +591,7 @@ unsigned long __get_wchan(struct task_struct *p) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(PAGE_SIZE); + sp -= get_random_u32_below(PAGE_SIZE); return sp & ~0xf; }

diff --git a/arch/loongarch/kernel/process.c b/arch/loongarch/kernel/process.c index 2526b68f1c0f..77952d814bad 100644 --- a/arch/loongarch/kernel/process.c +++ b/arch/loongarch/kernel/process.c @@ -293,7 +293,7 @@ unsigned long stack_top(void) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(PAGE_SIZE); + sp -= get_random_u32_below(PAGE_SIZE);

return sp & STACK_ALIGN; } diff --git a/arch/loongarch/kernel/vdso.c b/arch/loongarch/kernel/vdso.c index 8c9826062652..eaebd2e0f725 100644 --- a/arch/loongarch/kernel/vdso.c +++ b/arch/loongarch/kernel/vdso.c @@ -78,7 +78,7 @@ static unsigned long vdso_base(void) unsigned long base = STACK_TOP;

if (current->flags & PF_RANDOMIZE) { - base += prandom_u32_max(VDSO_RANDOMIZE_SIZE); + base += get_random_u32_below(VDSO_RANDOMIZE_SIZE); base = PAGE_ALIGN(base); }

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index bbe9ce471791..093dbbd6b843 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -711,7 +711,7 @@ unsigned long mips_stack_top(void) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(PAGE_SIZE); + sp -= get_random_u32_below(PAGE_SIZE);

return sp & ALMASK; } diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c index 5fd9bf1d596c..f6d40e43f108 100644 --- a/arch/mips/kernel/vdso.c +++ b/arch/mips/kernel/vdso.c @@ -79,7 +79,7 @@ static unsigned long vdso_base(void) }

if (current->flags & PF_RANDOMIZE) { - base += prandom_u32_max(VDSO_RANDOMIZE_SIZE); + base += get_random_u32_below(VDSO_RANDOMIZE_SIZE); base = PAGE_ALIGN(base); }

diff --git a/arch/parisc/kernel/vdso.c b/arch/parisc/kernel/vdso.c index 47e5960a2f96..c5cbfce7a84c 100644 --- a/arch/parisc/kernel/vdso.c +++ b/arch/parisc/kernel/vdso.c @@ -75,7 +75,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,

map_base = mm->mmap_base; if (current->flags & PF_RANDOMIZE) - map_base -= prandom_u32_max(0x20) * PAGE_SIZE; + map_base -= get_random_u32_below(0x20) * PAGE_SIZE;

vdso_text_start = get_unmapped_area(NULL, map_base, vdso_text_len, 0, 0);

diff --git a/arch/powerpc/crypto/crc-vpmsum_test.c b/arch/powerpc/crypto/crc-vpmsum_test.c index 273c527868db..c61a874a3a5c 100644 --- a/arch/powerpc/crypto/crc-vpmsum_test.c +++ b/arch/powerpc/crypto/crc-vpmsum_test.c @@ -77,8 +77,8 @@ static int __init crc_test_init(void)

pr_info("crc-vpmsum_test begins, %lu iterations\n", iterations); for (i=0; i<iterations; i++) { - size_t offset = prandom_u32_max(16); - size_t len = prandom_u32_max(MAX_CRC_LENGTH); + size_t offset = get_random_u32_below(16); + size_t len = get_random_u32_below(MAX_CRC_LENGTH);

if (len <= offset) continue; diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 67da147fe34d..fcf604370c66 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -2303,6 +2303,6 @@ void notrace __ppc64_runlatch_off(void) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(PAGE_SIZE); + sp -= get_random_u32_below(PAGE_SIZE); return sp & ~0xf; } diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 42af4b3aa02b..3f5d2db0b854 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -224,7 +224,7 @@ unsigned long __get_wchan(struct task_struct *p) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(PAGE_SIZE); + sp -= get_random_u32_below(PAGE_SIZE); return sp & ~0xf; }

diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index 3105ca5bd470..119328e1e2b3 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -227,7 +227,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned long len) end -= len;

if (end > start) { - offset = prandom_u32_max(((end - start) >> PAGE_SHIFT) + 1); + offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1); addr = start + (offset << PAGE_SHIFT); } else { addr = start; diff --git a/arch/sparc/vdso/vma.c b/arch/sparc/vdso/vma.c index ae9a86cb6f3d..136c78f28f8b 100644 --- a/arch/sparc/vdso/vma.c +++ b/arch/sparc/vdso/vma.c @@ -354,7 +354,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned int len) unsigned int offset;

/* This loses some more bits than a modulo, but is cheaper */ - offset = prandom_u32_max(PTRS_PER_PTE); + offset = get_random_u32_below(PTRS_PER_PTE); return start + (offset << PAGE_SHIFT); }

diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 010bc422a09d..e38f41444721 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -356,7 +356,7 @@ int singlestepping(void * t) unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(8192); + sp -= get_random_u32_below(8192); return sp & ~0xf; } #endif diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 311eae30e089..d45c5fcfeac2 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -327,7 +327,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned len) end -= len;

if (end > start) { - offset = prandom_u32_max(((end - start) >> PAGE_SHIFT) + 1); + offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1); addr = start + (offset << PAGE_SHIFT); } else { addr = start; diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c index c032edcd3d95..c09ae279ef32 100644 --- a/arch/x86/kernel/module.c +++ b/arch/x86/kernel/module.c @@ -53,7 +53,7 @@ static unsigned long int get_module_load_offset(void) */ if (module_load_offset == 0) module_load_offset = - (prandom_u32_max(1024) + 1) * PAGE_SIZE; + (get_random_u32_below(1024) + 1) * PAGE_SIZE; mutex_unlock(&module_kaslr_mutex); } return module_load_offset; diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index c21b7347a26d..62671ccf0404 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -965,7 +965,7 @@ early_param("idle", idle_setup); unsigned long arch_align_stack(unsigned long sp) { if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) - sp -= prandom_u32_max(8192); + sp -= get_random_u32_below(8192); return sp & ~0xf; }

diff --git a/arch/x86/mm/pat/cpa-test.c b/arch/x86/mm/pat/cpa-test.c index 423b21e80929..3d2f7f0a6ed1 100644 --- a/arch/x86/mm/pat/cpa-test.c +++ b/arch/x86/mm/pat/cpa-test.c @@ -136,10 +136,10 @@ static int pageattr_test(void) failed += print_split(&sa);

for (i = 0; i < NTEST; i++) { - unsigned long pfn = prandom_u32_max(max_pfn_mapped); + unsigned long pfn = get_random_u32_below(max_pfn_mapped);

addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT); - len[i] = prandom_u32_max(NPAGES); + len[i] = get_random_u32_below(NPAGES); len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1);

if (len[i] == 0) diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index 3285e3af43e1..0f722f8f779b 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -253,7 +253,7 @@ static int pkcs1pad_encrypt(struct akcipher_request *req) ps_end = ctx->key_size - req->src_len - 2; req_ctx->in_buf[0] = 0x02; for (i = 1; i < ps_end; i++) - req_ctx->in_buf[i] = 1 + prandom_u32_max(255); + req_ctx->in_buf[i] = 1 + get_random_u32_below(255); req_ctx->in_buf[ps_end] = 0x00;

pkcs1pad_sg_set_buf(req_ctx->in_sg, req_ctx->in_buf, diff --git a/crypto/testmgr.c b/crypto/testmgr.c index bcd059caa1c8..079923d43ce2 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -855,9 +855,9 @@ static int prepare_keybuf(const u8 *key, unsigned int ksize, /* Generate a random length in range [0, max_len], but prefer smaller values */ static unsigned int generate_random_length(unsigned int max_len) { - unsigned int len = prandom_u32_max(max_len + 1); + unsigned int len = get_random_u32_below(max_len + 1);

- switch (prandom_u32_max(4)) { + switch (get_random_u32_below(4)) { case 0: return len % 64; case 1: @@ -874,14 +874,14 @@ static void flip_random_bit(u8 *buf, size_t size) { size_t bitpos;

- bitpos = prandom_u32_max(size * 8); + bitpos = get_random_u32_below(size * 8); buf[bitpos / 8] ^= 1 << (bitpos % 8); }

/* Flip a random byte in the given nonempty data buffer */ static void flip_random_byte(u8 *buf, size_t size) { - buf[prandom_u32_max(size)] ^= 0xff; + buf[get_random_u32_below(size)] ^= 0xff; }

/* Sometimes make some random changes to the given nonempty data buffer */ @@ -891,15 +891,15 @@ static void mutate_buffer(u8 *buf, size_t size) size_t i;

/* Sometimes flip some bits */ - if (prandom_u32_max(4) == 0) { - num_flips = min_t(size_t, 1 << prandom_u32_max(8), size * 8); + if (get_random_u32_below(4) == 0) { + num_flips = min_t(size_t, 1 << get_random_u32_below(8), size * 8); for (i = 0; i < num_flips; i++) flip_random_bit(buf, size); }

/* Sometimes flip some bytes */ - if (prandom_u32_max(4) == 0) { - num_flips = min_t(size_t, 1 << prandom_u32_max(8), size); + if (get_random_u32_below(4) == 0) { + num_flips = min_t(size_t, 1 << get_random_u32_below(8), size); for (i = 0; i < num_flips; i++) flip_random_byte(buf, size); } @@ -915,11 +915,11 @@ static void generate_random_bytes(u8 *buf, size_t count) if (count == 0) return;

- switch (prandom_u32_max(8)) { /* Choose a generation strategy */ + switch (get_random_u32_below(8)) { /* Choose a generation strategy */ case 0: case 1: /* All the same byte, plus optional mutations */ - switch (prandom_u32_max(4)) { + switch (get_random_u32_below(4)) { case 0: b = 0x00; break; @@ -959,24 +959,24 @@ static char *generate_random_sgl_divisions(struct test_sg_division *divs, unsigned int this_len; const char *flushtype_str;

- if (div == &divs[max_divs - 1] || prandom_u32_max(2) == 0) + if (div == &divs[max_divs - 1] || get_random_u32_below(2) == 0) this_len = remaining; else - this_len = 1 + prandom_u32_max(remaining); + this_len = 1 + get_random_u32_below(remaining); div->proportion_of_total = this_len;

- if (prandom_u32_max(4) == 0) - div->offset = (PAGE_SIZE - 128) + prandom_u32_max(128); - else if (prandom_u32_max(2) == 0) - div->offset = prandom_u32_max(32); + if (get_random_u32_below(4) == 0) + div->offset = (PAGE_SIZE - 128) + get_random_u32_below(128); + else if (get_random_u32_below(2) == 0) + div->offset = get_random_u32_below(32); else - div->offset = prandom_u32_max(PAGE_SIZE); - if (prandom_u32_max(8) == 0) + div->offset = get_random_u32_below(PAGE_SIZE); + if (get_random_u32_below(8) == 0) div->offset_relative_to_alignmask = true;

div->flush_type = FLUSH_TYPE_NONE; if (gen_flushes) { - switch (prandom_u32_max(4)) { + switch (get_random_u32_below(4)) { case 0: div->flush_type = FLUSH_TYPE_REIMPORT; break; @@ -988,7 +988,7 @@ static char *generate_random_sgl_divisions(struct test_sg_division *divs,

if (div->flush_type != FLUSH_TYPE_NONE && !(req_flags & CRYPTO_TFM_REQ_MAY_SLEEP) && - prandom_u32_max(2) == 0) + get_random_u32_below(2) == 0) div->nosimd = true;

switch (div->flush_type) { @@ -1035,7 +1035,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg,

p += scnprintf(p, end - p, "random:");

- switch (prandom_u32_max(4)) { + switch (get_random_u32_below(4)) { case 0: case 1: cfg->inplace_mode = OUT_OF_PLACE; @@ -1050,12 +1050,12 @@ static void generate_random_testvec_config(struct testvec_config *cfg, break; }

- if (prandom_u32_max(2) == 0) { + if (get_random_u32_below(2) == 0) { cfg->req_flags |= CRYPTO_TFM_REQ_MAY_SLEEP; p += scnprintf(p, end - p, " may_sleep"); }

- switch (prandom_u32_max(4)) { + switch (get_random_u32_below(4)) { case 0: cfg->finalization_type = FINALIZATION_TYPE_FINAL; p += scnprintf(p, end - p, " use_final"); @@ -1071,7 +1071,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg, }

if (!(cfg->req_flags & CRYPTO_TFM_REQ_MAY_SLEEP) && - prandom_u32_max(2) == 0) { + get_random_u32_below(2) == 0) { cfg->nosimd = true; p += scnprintf(p, end - p, " nosimd"); } @@ -1084,7 +1084,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg, cfg->req_flags); p += scnprintf(p, end - p, "]");

- if (cfg->inplace_mode == OUT_OF_PLACE && prandom_u32_max(2) == 0) { + if (cfg->inplace_mode == OUT_OF_PLACE && get_random_u32_below(2) == 0) { p += scnprintf(p, end - p, " dst_divs=["); p = generate_random_sgl_divisions(cfg->dst_divs, ARRAY_SIZE(cfg->dst_divs), @@ -1093,13 +1093,13 @@ static void generate_random_testvec_config(struct testvec_config *cfg, p += scnprintf(p, end - p, "]"); }

- if (prandom_u32_max(2) == 0) { - cfg->iv_offset = 1 + prandom_u32_max(MAX_ALGAPI_ALIGNMASK); + if (get_random_u32_below(2) == 0) { + cfg->iv_offset = 1 + get_random_u32_below(MAX_ALGAPI_ALIGNMASK); p += scnprintf(p, end - p, " iv_offset=%u", cfg->iv_offset); }

- if (prandom_u32_max(2) == 0) { - cfg->key_offset = 1 + prandom_u32_max(MAX_ALGAPI_ALIGNMASK); + if (get_random_u32_below(2) == 0) { + cfg->key_offset = 1 + get_random_u32_below(MAX_ALGAPI_ALIGNMASK); p += scnprintf(p, end - p, " key_offset=%u", cfg->key_offset); }

@@ -1652,8 +1652,8 @@ static void generate_random_hash_testvec(struct shash_desc *desc, vec->ksize = 0; if (maxkeysize) { vec->ksize = maxkeysize; - if (prandom_u32_max(4) == 0) - vec->ksize = 1 + prandom_u32_max(maxkeysize); + if (get_random_u32_below(4) == 0) + vec->ksize = 1 + get_random_u32_below(maxkeysize); generate_random_bytes((u8 *)vec->key, vec->ksize);

vec->setkey_error = crypto_shash_setkey(desc->tfm, vec->key, @@ -2218,13 +2218,13 @@ static void mutate_aead_message(struct aead_testvec *vec, bool aad_iv, const unsigned int aad_tail_size = aad_iv ? ivsize : 0; const unsigned int authsize = vec->clen - vec->plen;

- if (prandom_u32_max(2) == 0 && vec->alen > aad_tail_size) { + if (get_random_u32_below(2) == 0 && vec->alen > aad_tail_size) { /* Mutate the AAD */ flip_random_bit((u8 *)vec->assoc, vec->alen - aad_tail_size); - if (prandom_u32_max(2) == 0) + if (get_random_u32_below(2) == 0) return; } - if (prandom_u32_max(2) == 0) { + if (get_random_u32_below(2) == 0) { /* Mutate auth tag (assuming it's at the end of ciphertext) */ flip_random_bit((u8 *)vec->ctext + vec->plen, authsize); } else { @@ -2249,7 +2249,7 @@ static void generate_aead_message(struct aead_request *req, const unsigned int ivsize = crypto_aead_ivsize(tfm); const unsigned int authsize = vec->clen - vec->plen; const bool inauthentic = (authsize >= MIN_COLLISION_FREE_AUTHSIZE) && - (prefer_inauthentic || prandom_u32_max(4) == 0); + (prefer_inauthentic || get_random_u32_below(4) == 0);

/* Generate the AAD. */ generate_random_bytes((u8 *)vec->assoc, vec->alen); @@ -2257,7 +2257,7 @@ static void generate_aead_message(struct aead_request *req, /* Avoid implementation-defined behavior. */ memcpy((u8 *)vec->assoc + vec->alen - ivsize, vec->iv, ivsize);

- if (inauthentic && prandom_u32_max(2) == 0) { + if (inauthentic && get_random_u32_below(2) == 0) { /* Generate a random ciphertext. */ generate_random_bytes((u8 *)vec->ctext, vec->clen); } else { @@ -2321,8 +2321,8 @@ static void generate_random_aead_testvec(struct aead_request *req,

/* Key: length in [0, maxkeysize], but usually choose maxkeysize */ vec->klen = maxkeysize; - if (prandom_u32_max(4) == 0) - vec->klen = prandom_u32_max(maxkeysize + 1); + if (get_random_u32_below(4) == 0) + vec->klen = get_random_u32_below(maxkeysize + 1); generate_random_bytes((u8 *)vec->key, vec->klen); vec->setkey_error = crypto_aead_setkey(tfm, vec->key, vec->klen);

@@ -2331,8 +2331,8 @@ static void generate_random_aead_testvec(struct aead_request *req,

/* Tag length: in [0, maxauthsize], but usually choose maxauthsize */ authsize = maxauthsize; - if (prandom_u32_max(4) == 0) - authsize = prandom_u32_max(maxauthsize + 1); + if (get_random_u32_below(4) == 0) + authsize = get_random_u32_below(maxauthsize + 1); if (prefer_inauthentic && authsize < MIN_COLLISION_FREE_AUTHSIZE) authsize = MIN_COLLISION_FREE_AUTHSIZE; if (WARN_ON(authsize > maxdatasize)) @@ -2342,7 +2342,7 @@ static void generate_random_aead_testvec(struct aead_request *req,

/* AAD, plaintext, and ciphertext lengths */ total_len = generate_random_length(maxdatasize); - if (prandom_u32_max(4) == 0) + if (get_random_u32_below(4) == 0) vec->alen = 0; else vec->alen = generate_random_length(total_len); @@ -2958,8 +2958,8 @@ static void generate_random_cipher_testvec(struct skcipher_request *req,

/* Key: length in [0, maxkeysize], but usually choose maxkeysize */ vec->klen = maxkeysize; - if (prandom_u32_max(4) == 0) - vec->klen = prandom_u32_max(maxkeysize + 1); + if (get_random_u32_below(4) == 0) + vec->klen = get_random_u32_below(maxkeysize + 1); generate_random_bytes((u8 *)vec->key, vec->klen); vec->setkey_error = crypto_skcipher_setkey(tfm, vec->key, vec->klen);

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index ee69d50ba4fd..3eccc6cd5004 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -781,7 +781,7 @@ static struct socket *drbd_wait_for_connect(struct drbd_connection *connection,

timeo = connect_int * HZ; /* 28.5% random jitter */ - timeo += prandom_u32_max(2) ? timeo / 7 : -timeo / 7; + timeo += get_random_u32_below(2) ? timeo / 7 : -timeo / 7;

err = wait_for_completion_interruptible_timeout(&ad->door_bell, timeo); if (err <= 0) @@ -1004,7 +1004,7 @@ retry: drbd_warn(connection, "Error receiving initial packet\n"); sock_release(s); randomize: - if (prandom_u32_max(2)) + if (get_random_u32_below(2)) goto retry; } } diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h index 01fd10a399b6..c73621aabbd1 100644 --- a/drivers/bus/mhi/host/internal.h +++ b/drivers/bus/mhi/host/internal.h @@ -129,7 +129,7 @@ enum mhi_pm_state { #define PRIMARY_CMD_RING 0 #define MHI_DEV_WAKE_DB 127 #define MHI_MAX_MTU 0xffff -#define MHI_RANDOM_U32_NONZERO(bmsk) (prandom_u32_max(bmsk) + 1) +#define MHI_RANDOM_U32_NONZERO(bmsk) (get_random_u32_below(bmsk) + 1)

enum mhi_er_type { MHI_ER_TYPE_INVALID = 0x0, diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c index 0a9b099d0518..9fbad7317d9b 100644 --- a/drivers/dma-buf/st-dma-fence-chain.c +++ b/drivers/dma-buf/st-dma-fence-chain.c @@ -400,7 +400,7 @@ static int __find_race(void *arg) struct dma_fence *fence = dma_fence_get(data->fc.tail); int seqno;

- seqno = prandom_u32_max(data->fc.chain_length) + 1; + seqno = get_random_u32_below(data->fc.chain_length) + 1;

err = dma_fence_chain_find_seqno(&fence, seqno); if (err) { @@ -429,7 +429,7 @@ static int __find_race(void *arg) dma_fence_put(fence);

signal: - seqno = prandom_u32_max(data->fc.chain_length - 1); + seqno = get_random_u32_below(data->fc.chain_length - 1); dma_fence_signal(data->fc.fences[seqno]); cond_resched(); } @@ -637,7 +637,7 @@ static void randomise_fences(struct fence_chains *fc) while (--count) { unsigned int swp;

- swp = prandom_u32_max(count + 1); + swp = get_random_u32_below(count + 1); if (swp == count) continue;

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 845023c14eb3..29d2459bcc90 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -2424,7 +2424,7 @@ gen8_dispatch_bsd_engine(struct drm_i915_private *dev_priv, /* Check whether the file_priv has already selected one ring. */ if ((int)file_priv->bsd_engine < 0) file_priv->bsd_engine = - prandom_u32_max(num_vcs_engines(dev_priv)); + get_random_u32_below(num_vcs_engines(dev_priv));

return file_priv->bsd_engine; } diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index c718e6dc40b5..45b605e32c87 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -3689,7 +3689,7 @@ static void virtual_engine_initial_hint(struct virtual_engine *ve) * NB This does not force us to execute on this engine, it will just * typically be the first we inspect for submission. */ - swp = prandom_u32_max(ve->num_siblings); + swp = get_random_u32_below(ve->num_siblings); if (swp) swap(ve->siblings[swp], ve->siblings[0]); } diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index 9a4a7fb55582..b9a164efd6ae 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -38,7 +38,7 @@ static int __iopagetest(struct intel_memory_region *mem, u8 value, resource_size_t offset, const void *caller) { - int byte = prandom_u32_max(pagesize); + int byte = get_random_u32_below(pagesize); u8 result[3];

memset_io(va, value, pagesize); /* or GPF! */ @@ -92,7 +92,7 @@ static int iopagetest(struct intel_memory_region *mem, static resource_size_t random_page(resource_size_t last) { /* Limited to low 44b (16TiB), but should suffice for a spot check */ - return prandom_u32_max(last >> PAGE_SHIFT) << PAGE_SHIFT; + return get_random_u32_below(last >> PAGE_SHIFT) << PAGE_SHIFT; }

static int iomemtest(struct intel_memory_region *mem, diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 26d1772179b8..dd1c703b10df 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -3807,7 +3807,7 @@ static int cma_alloc_any_port(enum rdma_ucm_port_space ps,

inet_get_local_port_range(net, &low, &high); remaining = (high - low) + 1; - rover = prandom_u32_max(remaining) + low; + rover = get_random_u32_below(remaining) + low; retry: if (last_used_port != rover) { struct rdma_bind_list *bind_list; diff --git a/drivers/infiniband/hw/cxgb4/id_table.c b/drivers/infiniband/hw/cxgb4/id_table.c index 280d61466855..e2188b335e76 100644 --- a/drivers/infiniband/hw/cxgb4/id_table.c +++ b/drivers/infiniband/hw/cxgb4/id_table.c @@ -54,7 +54,7 @@ u32 c4iw_id_alloc(struct c4iw_id_table *alloc)

if (obj < alloc->max) { if (alloc->flags & C4IW_ID_TABLE_F_RANDOM) - alloc->last += prandom_u32_max(RANDOM_SKIP); + alloc->last += get_random_u32_below(RANDOM_SKIP); else alloc->last = obj + 1; if (alloc->last >= alloc->max) @@ -85,7 +85,7 @@ int c4iw_id_table_alloc(struct c4iw_id_table *alloc, u32 start, u32 num, alloc->start = start; alloc->flags = flags; if (flags & C4IW_ID_TABLE_F_RANDOM) - alloc->last = prandom_u32_max(RANDOM_SKIP); + alloc->last = get_random_u32_below(RANDOM_SKIP); else alloc->last = 0; alloc->max = num; diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c b/drivers/infiniband/hw/hns/hns_roce_ah.c index 480c062dd04f..b37d2a81584d 100644 --- a/drivers/infiniband/hw/hns/hns_roce_ah.c +++ b/drivers/infiniband/hw/hns/hns_roce_ah.c @@ -41,8 +41,8 @@ static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr) u16 sport;

if (!fl) - sport = prandom_u32_max(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 - - IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) + + sport = get_random_u32_below(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + + 1 - IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) + IB_ROCE_UDP_ENCAP_VALID_PORT_MIN; else sport = rdma_flow_label_to_udp_sport(fl); diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c index 8546b8816524..ab75b690ad08 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1517,7 +1517,7 @@ static void rtrs_clt_err_recovery_work(struct work_struct *work) rtrs_clt_stop_and_destroy_conns(clt_path); queue_delayed_work(rtrs_wq, &clt_path->reconnect_dwork, msecs_to_jiffies(delay_ms + - prandom_u32_max(RTRS_RECONNECT_SEED))); + get_random_u32_below(RTRS_RECONNECT_SEED))); }

static struct rtrs_clt_path *alloc_path(struct rtrs_clt_sess *clt, diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index 3427555b0cca..32e21ba64357 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -401,7 +401,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio) }

if (bypass_torture_test(dc)) { - if (prandom_u32_max(4) == 3) + if (get_random_u32_below(4) == 3) goto skip; else goto rescale; diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c index 303d02b1d71c..a366566f22c3 100644 --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c @@ -872,7 +872,7 @@ static void precalculate_color(struct tpg_data *tpg, int k) } else if (tpg->pattern == TPG_PAT_NOISE) { r = g = b = get_random_u8(); } else if (k == TPG_COLOR_RANDOM) { - r = g = b = tpg->qual_offset + prandom_u32_max(196); + r = g = b = tpg->qual_offset + get_random_u32_below(196); } else if (k >= TPG_COLOR_RAMP) { r = g = b = k - TPG_COLOR_RAMP; } @@ -2286,7 +2286,7 @@ static void tpg_fill_params_extras(const struct tpg_data *tpg, params->wss_width = tpg->crop.width; params->wss_width = tpg_hscale_div(tpg, p, params->wss_width); params->wss_random_offset = - params->twopixsize * prandom_u32_max(tpg->src_width / 2); + params->twopixsize * get_random_u32_below(tpg->src_width / 2);

if (tpg->crop.left < tpg->border.left) { left_pillar_width = tpg->border.left - tpg->crop.left; @@ -2495,9 +2495,9 @@ static void tpg_fill_plane_pattern(const struct tpg_data *tpg, linestart_newer = tpg->black_line[p]; } else if (tpg->pattern == TPG_PAT_NOISE || tpg->qual == TPG_QUAL_NOISE) { linestart_older = tpg->random_line[p] + - twopixsize * prandom_u32_max(tpg->src_width / 2); + twopixsize * get_random_u32_below(tpg->src_width / 2); linestart_newer = tpg->random_line[p] + - twopixsize * prandom_u32_max(tpg->src_width / 2); + twopixsize * get_random_u32_below(tpg->src_width / 2); } else { unsigned frame_line_old = (frame_line + mv_vert_old) % tpg->src_height; diff --git a/drivers/media/test-drivers/vidtv/vidtv_demod.c b/drivers/media/test-drivers/vidtv/vidtv_demod.c index e7959ab1add8..d60c6d16beea 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_demod.c +++ b/drivers/media/test-drivers/vidtv/vidtv_demod.c @@ -188,11 +188,11 @@ static void vidtv_demod_update_stats(struct dvb_frontend *fe) * Also, usually, signal strength is a negative number in dBm. */ c->strength.stat[0].svalue = state->tuner_cnr; - c->strength.stat[0].svalue -= prandom_u32_max(state->tuner_cnr / 50); + c->strength.stat[0].svalue -= get_random_u32_below(state->tuner_cnr / 50); c->strength.stat[0].svalue -= 68000; /* Adjust to a better range */

c->cnr.stat[0].svalue = state->tuner_cnr; - c->cnr.stat[0].svalue -= prandom_u32_max(state->tuner_cnr / 50); + c->cnr.stat[0].svalue -= get_random_u32_below(state->tuner_cnr / 50); }

static int vidtv_demod_read_status(struct dvb_frontend *fe, @@ -213,11 +213,11 @@ static int vidtv_demod_read_status(struct dvb_frontend *fe,

if (snr < cnr2qual->cnr_ok) { /* eventually lose the TS lock */ - if (prandom_u32_max(100) < config->drop_tslock_prob_on_low_snr) + if (get_random_u32_below(100) < config->drop_tslock_prob_on_low_snr) state->status = 0; } else { /* recover if the signal improves */ - if (prandom_u32_max(100) < + if (get_random_u32_below(100) < config->recover_tslock_prob_on_good_snr) state->status = FE_HAS_SIGNAL | FE_HAS_CARRIER | diff --git a/drivers/media/test-drivers/vivid/vivid-kthread-cap.c b/drivers/media/test-drivers/vivid/vivid-kthread-cap.c index 690daada7db4..ee65d20314d3 100644 --- a/drivers/media/test-drivers/vivid/vivid-kthread-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-kthread-cap.c @@ -693,7 +693,7 @@ static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev,

/* Drop a certain percentage of buffers. */ if (dev->perc_dropped_buffers && - prandom_u32_max(100) < dev->perc_dropped_buffers) + get_random_u32_below(100) < dev->perc_dropped_buffers) goto update_mv;

spin_lock(&dev->slock); diff --git a/drivers/media/test-drivers/vivid/vivid-kthread-out.c b/drivers/media/test-drivers/vivid/vivid-kthread-out.c index 0833e021bb11..fac6208b51da 100644 --- a/drivers/media/test-drivers/vivid/vivid-kthread-out.c +++ b/drivers/media/test-drivers/vivid/vivid-kthread-out.c @@ -51,7 +51,7 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev)

/* Drop a certain percentage of buffers. */ if (dev->perc_dropped_buffers && - prandom_u32_max(100) < dev->perc_dropped_buffers) + get_random_u32_below(100) < dev->perc_dropped_buffers) return;

spin_lock(&dev->slock); diff --git a/drivers/media/test-drivers/vivid/vivid-radio-rx.c b/drivers/media/test-drivers/vivid/vivid-radio-rx.c index 8bd09589fb15..79c1723bd84c 100644 --- a/drivers/media/test-drivers/vivid/vivid-radio-rx.c +++ b/drivers/media/test-drivers/vivid/vivid-radio-rx.c @@ -94,8 +94,8 @@ retry:

if (data_blk == 0 && dev->radio_rds_loop) vivid_radio_rds_init(dev); - if (perc && prandom_u32_max(100) < perc) { - switch (prandom_u32_max(4)) { + if (perc && get_random_u32_below(100) < perc) { + switch (get_random_u32_below(4)) { case 0: rds.block |= V4L2_RDS_BLOCK_CORRECTED; break; diff --git a/drivers/media/test-drivers/vivid/vivid-sdr-cap.c b/drivers/media/test-drivers/vivid/vivid-sdr-cap.c index 0ae5628b86c9..a81f26b76988 100644 --- a/drivers/media/test-drivers/vivid/vivid-sdr-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-sdr-cap.c @@ -90,7 +90,7 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev)

/* Drop a certain percentage of buffers. */ if (dev->perc_dropped_buffers && - prandom_u32_max(100) < dev->perc_dropped_buffers) + get_random_u32_below(100) < dev->perc_dropped_buffers) return;

spin_lock(&dev->slock); diff --git a/drivers/media/test-drivers/vivid/vivid-touch-cap.c b/drivers/media/test-drivers/vivid/vivid-touch-cap.c index 6cc32eb54f9d..c7f6e23df51e 100644 --- a/drivers/media/test-drivers/vivid/vivid-touch-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-touch-cap.c @@ -221,7 +221,7 @@ static void vivid_fill_buff_noise(__s16 *tch_buf, int size)

static inline int get_random_pressure(void) { - return prandom_u32_max(VIVID_PRESSURE_LIMIT); + return get_random_u32_below(VIVID_PRESSURE_LIMIT); }

static void vivid_tch_buf_set(struct v4l2_pix_format *f, diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 95fa8fb1d45f..a1efda85c6f2 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -97,8 +97,8 @@ static void mmc_should_fail_request(struct mmc_host *host, !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) return;

- data->error = data_errors[prandom_u32_max(ARRAY_SIZE(data_errors))]; - data->bytes_xfered = prandom_u32_max(data->bytes_xfered >> 9) << 9; + data->error = data_errors[get_random_u32_below(ARRAY_SIZE(data_errors))]; + data->bytes_xfered = get_random_u32_below(data->bytes_xfered >> 9) << 9; }

#else /* CONFIG_FAIL_MMC_REQUEST */ diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index c78bbc22e0d1..6ef410053037 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1858,7 +1858,7 @@ static void dw_mci_start_fault_timer(struct dw_mci *host) * Try to inject the error at random points during the data transfer. */ hrtimer_start(&host->fault_timer, - ms_to_ktime(prandom_u32_max(25)), + ms_to_ktime(get_random_u32_below(25)), HRTIMER_MODE_REL); }

diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c index 672719023241..274a31b93100 100644 --- a/drivers/mtd/nand/raw/nandsim.c +++ b/drivers/mtd/nand/raw/nandsim.c @@ -1405,9 +1405,9 @@ static void ns_do_bit_flips(struct nandsim *ns, int num) if (bitflips && get_random_u16() < (1 << 6)) { int flips = 1; if (bitflips > 1) - flips = prandom_u32_max(bitflips) + 1; + flips = get_random_u32_below(bitflips) + 1; while (flips--) { - int pos = prandom_u32_max(num * 8); + int pos = get_random_u32_below(num * 8); ns->buf.byte[pos / 8] ^= (1 << (pos % 8)); NS_WARN("read_page: flipping bit %d in page %d " "reading from %d ecc: corrected=%u failed=%u\n", diff --git a/drivers/mtd/tests/mtd_nandecctest.c b/drivers/mtd/tests/mtd_nandecctest.c index 440988562cfd..824cc1c03b6a 100644 --- a/drivers/mtd/tests/mtd_nandecctest.c +++ b/drivers/mtd/tests/mtd_nandecctest.c @@ -47,7 +47,7 @@ struct nand_ecc_test { static void single_bit_error_data(void *error_data, void *correct_data, size_t size) { - unsigned int offset = prandom_u32_max(size * BITS_PER_BYTE); + unsigned int offset = get_random_u32_below(size * BITS_PER_BYTE);

memcpy(error_data, correct_data, size); __change_bit_le(offset, error_data); @@ -58,9 +58,9 @@ static void double_bit_error_data(void *error_data, void *correct_data, { unsigned int offset[2];

- offset[0] = prandom_u32_max(size * BITS_PER_BYTE); + offset[0] = get_random_u32_below(size * BITS_PER_BYTE); do { - offset[1] = prandom_u32_max(size * BITS_PER_BYTE); + offset[1] = get_random_u32_below(size * BITS_PER_BYTE); } while (offset[0] == offset[1]);

memcpy(error_data, correct_data, size); @@ -71,7 +71,7 @@ static void double_bit_error_data(void *error_data, void *correct_data,

static unsigned int random_ecc_bit(size_t size) { - unsigned int offset = prandom_u32_max(3 * BITS_PER_BYTE); + unsigned int offset = get_random_u32_below(3 * BITS_PER_BYTE);

if (size == 256) { /* @@ -79,7 +79,7 @@ static unsigned int random_ecc_bit(size_t size) * and 17th bit) in ECC code for 256 byte data block */ while (offset == 16 || offset == 17) - offset = prandom_u32_max(3 * BITS_PER_BYTE); + offset = get_random_u32_below(3 * BITS_PER_BYTE); }

return offset; diff --git a/drivers/mtd/tests/stresstest.c b/drivers/mtd/tests/stresstest.c index 75b6ddc5dc4d..8062098930d6 100644 --- a/drivers/mtd/tests/stresstest.c +++ b/drivers/mtd/tests/stresstest.c @@ -46,7 +46,7 @@ static int rand_eb(void)

again: /* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */ - eb = prandom_u32_max(ebcnt - 1); + eb = get_random_u32_below(ebcnt - 1); if (bbt[eb]) goto again; return eb; @@ -54,12 +54,12 @@ again:

static int rand_offs(void) { - return prandom_u32_max(bufsize); + return get_random_u32_below(bufsize); }

static int rand_len(int offs) { - return prandom_u32_max(bufsize - offs); + return get_random_u32_below(bufsize - offs); }

static int do_read(void) @@ -118,7 +118,7 @@ static int do_write(void)

static int do_operation(void) { - if (prandom_u32_max(2)) + if (get_random_u32_below(2)) return do_read(); else return do_write(); diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c index 908d0e088557..fcca6942dbdd 100644 --- a/drivers/mtd/ubi/debug.c +++ b/drivers/mtd/ubi/debug.c @@ -590,7 +590,7 @@ int ubi_dbg_power_cut(struct ubi_device *ubi, int caller)

if (ubi->dbg.power_cut_max > ubi->dbg.power_cut_min) { range = ubi->dbg.power_cut_max - ubi->dbg.power_cut_min; - ubi->dbg.power_cut_counter += prandom_u32_max(range); + ubi->dbg.power_cut_counter += get_random_u32_below(range); } return 0; } diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h index dc8d8f83657a..23676f32b681 100644 --- a/drivers/mtd/ubi/debug.h +++ b/drivers/mtd/ubi/debug.h @@ -73,7 +73,7 @@ static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi) static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi) { if (ubi->dbg.emulate_bitflips) - return !prandom_u32_max(200); + return !get_random_u32_below(200); return 0; }

@@ -87,7 +87,7 @@ static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi) static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi) { if (ubi->dbg.emulate_io_failures) - return !prandom_u32_max(500); + return !get_random_u32_below(500); return 0; }

@@ -101,7 +101,7 @@ static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi) static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi) { if (ubi->dbg.emulate_io_failures) - return !prandom_u32_max(400); + return !get_random_u32_below(400); return 0; }

diff --git a/drivers/net/ethernet/broadcom/cnic.c b/drivers/net/ethernet/broadcom/cnic.c index 2198e35d9e18..74bc053a2078 100644 --- a/drivers/net/ethernet/broadcom/cnic.c +++ b/drivers/net/ethernet/broadcom/cnic.c @@ -4105,7 +4105,7 @@ static int cnic_cm_alloc_mem(struct cnic_dev *dev) for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) atomic_set(&cp->csk_tbl[i].ref_count, 0);

- port_id = prandom_u32_max(CNIC_LOCAL_PORT_RANGE); + port_id = get_random_u32_below(CNIC_LOCAL_PORT_RANGE); if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE, CNIC_LOCAL_PORT_MIN, port_id)) { cnic_cm_free_mem(dev); diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c index a4256087ac82..ae6b17b96bf1 100644 --- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c +++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c @@ -919,8 +919,8 @@ static int csk_wait_memory(struct chtls_dev *cdev, current_timeo = *timeo_p; noblock = (*timeo_p ? false : true); if (csk_mem_free(cdev, sk)) { - current_timeo = prandom_u32_max(HZ / 5) + 2; - vm_wait = prandom_u32_max(HZ / 5) + 2; + current_timeo = get_random_u32_below(HZ / 5) + 2; + vm_wait = get_random_u32_below(HZ / 5) + 2; }

add_wait_queue(sk_sleep(sk), &wait); diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index 349b7b1dbbf2..b07513c61c35 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -1758,7 +1758,7 @@ static int qca808x_phy_fast_retrain_config(struct phy_device *phydev)

static int qca808x_phy_ms_random_seed_set(struct phy_device *phydev) { - u16 seed_value = prandom_u32_max(QCA808X_MASTER_SLAVE_SEED_RANGE); + u16 seed_value = get_random_u32_below(QCA808X_MASTER_SLAVE_SEED_RANGE);

return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED, QCA808X_MASTER_SLAVE_SEED_CFG, diff --git a/drivers/net/team/team_mode_random.c b/drivers/net/team/team_mode_random.c index f3f8dd428402..53d0ce34b8ce 100644 --- a/drivers/net/team/team_mode_random.c +++ b/drivers/net/team/team_mode_random.c @@ -16,7 +16,7 @@ static bool rnd_transmit(struct team *team, struct sk_buff *skb) struct team_port *port; int port_index;

- port_index = prandom_u32_max(team->en_port_count); + port_index = get_random_u32_below(team->en_port_count); port = team_get_port_by_index_rcu(team, port_index); if (unlikely(!port)) goto drop; diff --git a/drivers/net/wireguard/selftest/allowedips.c b/drivers/net/wireguard/selftest/allowedips.c index 19eac00b2381..78a916f30c82 100644 --- a/drivers/net/wireguard/selftest/allowedips.c +++ b/drivers/net/wireguard/selftest/allowedips.c @@ -285,8 +285,8 @@ static __init bool randomized_test(void)

for (i = 0; i < NUM_RAND_ROUTES; ++i) { get_random_bytes(ip, 4); - cidr = prandom_u32_max(32) + 1; - peer = peers[prandom_u32_max(NUM_PEERS)]; + cidr = get_random_u32_below(32) + 1; + peer = peers[get_random_u32_below(NUM_PEERS)]; if (wg_allowedips_insert_v4(&t, (struct in_addr *)ip, cidr, peer, &mutex) < 0) { pr_err("allowedips random self-test malloc: FAIL\n"); @@ -300,7 +300,7 @@ static __init bool randomized_test(void) for (j = 0; j < NUM_MUTATED_ROUTES; ++j) { memcpy(mutated, ip, 4); get_random_bytes(mutate_mask, 4); - mutate_amount = prandom_u32_max(32); + mutate_amount = get_random_u32_below(32); for (k = 0; k < mutate_amount / 8; ++k) mutate_mask[k] = 0xff; mutate_mask[k] = 0xff @@ -311,8 +311,8 @@ static __init bool randomized_test(void) mutated[k] = (mutated[k] & mutate_mask[k]) | (~mutate_mask[k] & get_random_u8()); - cidr = prandom_u32_max(32) + 1; - peer = peers[prandom_u32_max(NUM_PEERS)]; + cidr = get_random_u32_below(32) + 1; + peer = peers[get_random_u32_below(NUM_PEERS)]; if (wg_allowedips_insert_v4(&t, (struct in_addr *)mutated, cidr, peer, &mutex) < 0) { @@ -329,8 +329,8 @@ static __init bool randomized_test(void)

for (i = 0; i < NUM_RAND_ROUTES; ++i) { get_random_bytes(ip, 16); - cidr = prandom_u32_max(128) + 1; - peer = peers[prandom_u32_max(NUM_PEERS)]; + cidr = get_random_u32_below(128) + 1; + peer = peers[get_random_u32_below(NUM_PEERS)]; if (wg_allowedips_insert_v6(&t, (struct in6_addr *)ip, cidr, peer, &mutex) < 0) { pr_err("allowedips random self-test malloc: FAIL\n"); @@ -344,7 +344,7 @@ static __init bool randomized_test(void) for (j = 0; j < NUM_MUTATED_ROUTES; ++j) { memcpy(mutated, ip, 16); get_random_bytes(mutate_mask, 16); - mutate_amount = prandom_u32_max(128); + mutate_amount = get_random_u32_below(128); for (k = 0; k < mutate_amount / 8; ++k) mutate_mask[k] = 0xff; mutate_mask[k] = 0xff @@ -355,8 +355,8 @@ static __init bool randomized_test(void) mutated[k] = (mutated[k] & mutate_mask[k]) | (~mutate_mask[k] & get_random_u8()); - cidr = prandom_u32_max(128) + 1; - peer = peers[prandom_u32_max(NUM_PEERS)]; + cidr = get_random_u32_below(128) + 1; + peer = peers[get_random_u32_below(NUM_PEERS)]; if (wg_allowedips_insert_v6(&t, (struct in6_addr *)mutated, cidr, peer, &mutex) < 0) { diff --git a/drivers/net/wireguard/timers.c b/drivers/net/wireguard/timers.c index d54d32ac9bc4..b5706b6718b1 100644 --- a/drivers/net/wireguard/timers.c +++ b/drivers/net/wireguard/timers.c @@ -147,7 +147,7 @@ void wg_timers_data_sent(struct wg_peer *peer) if (!timer_pending(&peer->timer_new_handshake)) mod_peer_timer(peer, &peer->timer_new_handshake, jiffies + (KEEPALIVE_TIMEOUT + REKEY_TIMEOUT) * HZ + - prandom_u32_max(REKEY_TIMEOUT_JITTER_MAX_JIFFIES)); + get_random_u32_below(REKEY_TIMEOUT_JITTER_MAX_JIFFIES)); }

/* Should be called after an authenticated data packet is received. */ @@ -183,7 +183,7 @@ void wg_timers_handshake_initiated(struct wg_peer *peer) { mod_peer_timer(peer, &peer->timer_retransmit_handshake, jiffies + REKEY_TIMEOUT * HZ + - prandom_u32_max(REKEY_TIMEOUT_JITTER_MAX_JIFFIES)); + get_random_u32_below(REKEY_TIMEOUT_JITTER_MAX_JIFFIES)); }

/* Should be called after a handshake response message is received and processed diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c index 10d9d9c63b28..23c971b77965 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c @@ -1128,7 +1128,7 @@ static void brcmf_p2p_afx_handler(struct work_struct *work) if (afx_hdl->is_listen && afx_hdl->my_listen_chan) /* 100ms ~ 300ms */ err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, - 100 * (1 + prandom_u32_max(3))); + 100 * (1 + get_random_u32_below(3))); else err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c index de0c545d50fd..1696fbf1009a 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c @@ -1099,7 +1099,7 @@ static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, iwl_mvm_mac_ap_iterator, &data);

if (data.beacon_device_ts) { - u32 rand = prandom_u32_max(64 - 36) + 36; + u32 rand = get_random_u32_below(64 - 36) + 36; mvmvif->ap_beacon_time = data.beacon_device_ts + ieee80211_tu_to_usec(data.beacon_int * rand / 100); diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 88dc66ee1c46..5565f67d6537 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -673,7 +673,7 @@ struct pci_dev *pci_p2pmem_find_many(struct device **clients, int num_clients) }

if (dev_cnt) - pdev = pci_dev_get(closest_pdevs[prandom_u32_max(dev_cnt)]); + pdev = pci_dev_get(closest_pdevs[get_random_u32_below(dev_cnt)]);

for (i = 0; i < dev_cnt; i++) pci_dev_put(closest_pdevs[i]); diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index 77917b339870..f21307537829 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -48,7 +48,7 @@ unsigned int zfcp_fc_port_scan_backoff(void) { if (!port_scan_backoff) return 0; - return prandom_u32_max(port_scan_backoff); + return get_random_u32_below(port_scan_backoff); }

static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter) diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index ddc048069af2..5c8d1ba3f8f3 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -2233,7 +2233,7 @@ static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)

if (fip->probe_tries < FIP_VN_RLIM_COUNT) { fip->probe_tries++; - wait = prandom_u32_max(FIP_VN_PROBE_WAIT); + wait = get_random_u32_below(FIP_VN_PROBE_WAIT); } else wait = FIP_VN_RLIM_INT; mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); @@ -3125,7 +3125,7 @@ static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) fcoe_all_vn2vn, 0); fip->port_ka_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT + - prandom_u32_max(FIP_VN_BEACON_FUZZ)); + get_random_u32_below(FIP_VN_BEACON_FUZZ)); } if (time_before(fip->port_ka_time, next_time)) next_time = fip->port_ka_time; diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c index df2fe7bd26d1..f2ee49756df8 100644 --- a/drivers/scsi/qedi/qedi_main.c +++ b/drivers/scsi/qedi/qedi_main.c @@ -618,7 +618,7 @@ static int qedi_cm_alloc_mem(struct qedi_ctx *qedi) sizeof(struct qedi_endpoint *)), GFP_KERNEL); if (!qedi->ep_tbl) return -ENOMEM; - port_id = prandom_u32_max(QEDI_LOCAL_PORT_RANGE); + port_id = get_random_u32_below(QEDI_LOCAL_PORT_RANGE); if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE, QEDI_LOCAL_PORT_MIN, port_id)) { qedi_cm_free_mem(qedi); diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 697fc57bc711..4e476f1bc3c3 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -5695,16 +5695,16 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, u64 ns = jiffies_to_nsecs(delta_jiff);

if (sdebug_random && ns < U32_MAX) { - ns = prandom_u32_max((u32)ns); + ns = get_random_u32_below((u32)ns); } else if (sdebug_random) { ns >>= 12; /* scale to 4 usec precision */ if (ns < U32_MAX) /* over 4 hours max */ - ns = prandom_u32_max((u32)ns); + ns = get_random_u32_below((u32)ns); ns <<= 12; } kt = ns_to_ktime(ns); } else { /* ndelay has a 4.2 second max */ - kt = sdebug_random ? prandom_u32_max((u32)ndelay) : + kt = sdebug_random ? get_random_u32_below((u32)ndelay) : (u32)ndelay; if (ndelay < INCLUSIVE_TIMING_MAX_NS) { u64 d = ktime_get_boottime_ns() - ns_from_boot; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 4af5e55abc15..fb255988dee8 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -362,7 +362,7 @@ static int ceph_fill_fragtree(struct inode *inode, if (nsplits != ci->i_fragtree_nsplits) { update = true; } else if (nsplits) { - i = prandom_u32_max(nsplits); + i = get_random_u32_below(nsplits); id = le32_to_cpu(fragtree->splits[i].frag); if (!__ceph_find_frag(ci, id)) update = true; diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c index 3fbabc98e1f7..7dac21ee6ce7 100644 --- a/fs/ceph/mdsmap.c +++ b/fs/ceph/mdsmap.c @@ -29,7 +29,7 @@ static int __mdsmap_get_random_mds(struct ceph_mdsmap *m, bool ignore_laggy) return -1;

/* pick */ - n = prandom_u32_max(n); + n = get_random_u32_below(n); for (j = 0, i = 0; i < m->possible_max_rank; i++) { if (CEPH_MDS_IS_READY(i, ignore_laggy)) j++; diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c index f4944c4dee60..78b8686d9a4a 100644 --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -277,7 +277,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent) int best_ndir = inodes_per_group; int best_group = -1;

- parent_group = prandom_u32_max(ngroups); + parent_group = get_random_u32_below(ngroups); for (i = 0; i < ngroups; i++) { group = (parent_group + i) % ngroups; desc = ext2_get_group_desc (sb, group, NULL); diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index e9bc46684106..9fc1af8e19a3 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -465,7 +465,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo); parent_group = hinfo.hash % ngroups; } else - parent_group = prandom_u32_max(ngroups); + parent_group = get_random_u32_below(ngroups); for (i = 0; i < ngroups; i++) { g = (parent_group + i) % ngroups; get_orlov_stats(sb, g, flex_size, &stats); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 7950904fbf04..106fb06e24e8 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3778,7 +3778,7 @@ cont_thread: } if (!progress) { elr->lr_next_sched = jiffies + - prandom_u32_max(EXT4_DEF_LI_MAX_START_DELAY * HZ); + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); } if (time_before(elr->lr_next_sched, next_wakeup)) next_wakeup = elr->lr_next_sched; @@ -3925,8 +3925,7 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, * spread the inode table initialization requests * better. */ - elr->lr_next_sched = jiffies + prandom_u32_max( - EXT4_DEF_LI_MAX_START_DELAY * HZ); + elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); return elr; }

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 4546e01b2ee0..536d332d9e2e 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -282,7 +282,7 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type,

/* let's select beginning hot/small space first in no_heap mode*/ if (f2fs_need_rand_seg(sbi)) - p->offset = prandom_u32_max(MAIN_SECS(sbi) * sbi->segs_per_sec); + p->offset = get_random_u32_below(MAIN_SECS(sbi) * sbi->segs_per_sec); else if (test_opt(sbi, NOHEAP) && (type == CURSEG_HOT_DATA || IS_NODESEG(type))) p->offset = 0; diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index acf3d3fa4363..334415d946f8 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2534,7 +2534,7 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)

sanity_check_seg_type(sbi, seg_type); if (f2fs_need_rand_seg(sbi)) - return prandom_u32_max(MAIN_SECS(sbi) * sbi->segs_per_sec); + return get_random_u32_below(MAIN_SECS(sbi) * sbi->segs_per_sec);

/* if segs_per_sec is large than 1, we need to keep original policy. */ if (__is_large_section(sbi)) @@ -2588,7 +2588,7 @@ static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) curseg->alloc_type = LFS; if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) curseg->fragment_remained_chunk = - prandom_u32_max(sbi->max_fragment_chunk) + 1; + get_random_u32_below(sbi->max_fragment_chunk) + 1; }

static int __next_free_blkoff(struct f2fs_sb_info *sbi, @@ -2625,9 +2625,9 @@ static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, /* To allocate block chunks in different sizes, use random number */ if (--seg->fragment_remained_chunk <= 0) { seg->fragment_remained_chunk = - prandom_u32_max(sbi->max_fragment_chunk) + 1; + get_random_u32_below(sbi->max_fragment_chunk) + 1; seg->next_blkoff += - prandom_u32_max(sbi->max_fragment_hole) + 1; + get_random_u32_below(sbi->max_fragment_hole) + 1; } } } diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 3f128b9fdfbb..9c9d3f0e36a4 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -2467,7 +2467,7 @@ error_dump:

static inline int chance(unsigned int n, unsigned int out_of) { - return !!(prandom_u32_max(out_of) + 1 <= n); + return !!(get_random_u32_below(out_of) + 1 <= n);

}

@@ -2485,13 +2485,13 @@ static int power_cut_emulated(struct ubifs_info *c, int lnum, int write) if (chance(1, 2)) { d->pc_delay = 1; /* Fail within 1 minute */ - delay = prandom_u32_max(60000); + delay = get_random_u32_below(60000); d->pc_timeout = jiffies; d->pc_timeout += msecs_to_jiffies(delay); ubifs_warn(c, "failing after %lums", delay); } else { d->pc_delay = 2; - delay = prandom_u32_max(10000); + delay = get_random_u32_below(10000); /* Fail within 10000 operations */ d->pc_cnt_max = delay; ubifs_warn(c, "failing after %lu calls", delay); @@ -2571,7 +2571,7 @@ static int corrupt_data(const struct ubifs_info *c, const void *buf, unsigned int from, to, ffs = chance(1, 2); unsigned char *p = (void *)buf;

- from = prandom_u32_max(len); + from = get_random_u32_below(len); /* Corruption span max to end of write unit */ to = min(len, ALIGN(from + 1, c->max_write_size));

diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c index cfbc31f709f4..c4d079328b92 100644 --- a/fs/ubifs/lpt_commit.c +++ b/fs/ubifs/lpt_commit.c @@ -1970,28 +1970,28 @@ static int dbg_populate_lsave(struct ubifs_info *c)

if (!dbg_is_chk_gen(c)) return 0; - if (prandom_u32_max(4)) + if (get_random_u32_below(4)) return 0;

for (i = 0; i < c->lsave_cnt; i++) c->lsave[i] = c->main_first;

list_for_each_entry(lprops, &c->empty_list, list) - c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum; list_for_each_entry(lprops, &c->freeable_list, list) - c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum; list_for_each_entry(lprops, &c->frdi_idx_list, list) - c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum;

heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1]; for (i = 0; i < heap->cnt; i++) - c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum; heap = &c->lpt_heap[LPROPS_DIRTY - 1]; for (i = 0; i < heap->cnt; i++) - c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum; heap = &c->lpt_heap[LPROPS_FREE - 1]; for (i = 0; i < heap->cnt; i++) - c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum; + c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum;

return 1; } diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c index 01362ad5f804..a55e04822d16 100644 --- a/fs/ubifs/tnc_commit.c +++ b/fs/ubifs/tnc_commit.c @@ -700,7 +700,7 @@ static int alloc_idx_lebs(struct ubifs_info *c, int cnt) c->ilebs[c->ileb_cnt++] = lnum; dbg_cmt("LEB %d", lnum); } - if (dbg_is_chk_index(c) && !prandom_u32_max(8)) + if (dbg_is_chk_index(c) && !get_random_u32_below(8)) return -ENOSPC; return 0; } diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 6261599bb389..a0221e9afa19 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -1520,7 +1520,7 @@ xfs_alloc_ag_vextent_lastblock(

#ifdef DEBUG /* Randomly don't execute the first algorithm. */ - if (prandom_u32_max(2)) + if (get_random_u32_below(2)) return 0; #endif

diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c index 94db50eb706a..5118dedf9267 100644 --- a/fs/xfs/libxfs/xfs_ialloc.c +++ b/fs/xfs/libxfs/xfs_ialloc.c @@ -636,7 +636,7 @@ xfs_ialloc_ag_alloc( /* randomly do sparse inode allocations */ if (xfs_has_sparseinodes(tp->t_mountp) && igeo->ialloc_min_blks < igeo->ialloc_blks) - do_sparse = prandom_u32_max(2); + do_sparse = get_random_u32_below(2); #endif

/* diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c index 7db588ed0be5..8fc58abffb8b 100644 --- a/fs/xfs/xfs_error.c +++ b/fs/xfs/xfs_error.c @@ -274,7 +274,7 @@ xfs_errortag_test(

ASSERT(error_tag < XFS_ERRTAG_MAX); randfactor = mp->m_errortag[error_tag]; - if (!randfactor || prandom_u32_max(randfactor)) + if (!randfactor || get_random_u32_below(randfactor)) return false;

xfs_warn_ratelimited(mp, diff --git a/include/linux/damon.h b/include/linux/damon.h index 620ada094c3b..84525b9cdf6e 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -21,7 +21,7 @@ /* Get a random number in [l, r) */ static inline unsigned long damon_rand(unsigned long l, unsigned long r) { - return l + prandom_u32_max(r - l); + return l + get_random_u32_below(r - l); }

/** diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index efef68c9352a..bb0ee80526b2 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -516,7 +516,7 @@ static inline int node_random(const nodemask_t *maskp) bit = first_node(*maskp); break; default: - bit = find_nth_bit(maskp->bits, MAX_NUMNODES, prandom_u32_max(w)); + bit = find_nth_bit(maskp->bits, MAX_NUMNODES, get_random_u32_below(w)); break; } return bit; diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 25a54e04560e..38159f39e2af 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -1032,7 +1032,7 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr, hdr->size = size; hole = min_t(unsigned int, size - (proglen + sizeof(*hdr)), PAGE_SIZE - sizeof(*hdr)); - start = prandom_u32_max(hole) & ~(alignment - 1); + start = get_random_u32_below(hole) & ~(alignment - 1);

/* Leave a random number of instructions before BPF code. */ *image_ptr = &hdr->image[start]; @@ -1094,7 +1094,7 @@ bpf_jit_binary_pack_alloc(unsigned int proglen, u8 **image_ptr,

hole = min_t(unsigned int, size - (proglen + sizeof(*ro_header)), BPF_PROG_CHUNK_SIZE - sizeof(*ro_header)); - start = prandom_u32_max(hole) & ~(alignment - 1); + start = get_random_u32_below(hole) & ~(alignment - 1);

*image_ptr = &ro_header->image[start]; *rw_image = &(*rw_header)->image[start]; diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c index 1740ce389e7f..7b619f16a492 100644 --- a/kernel/kcsan/selftest.c +++ b/kernel/kcsan/selftest.c @@ -31,8 +31,8 @@ static bool __init test_encode_decode(void) int i;

for (i = 0; i < ITERS_PER_TEST; ++i) { - size_t size = prandom_u32_max(MAX_ENCODABLE_SIZE) + 1; - bool is_write = !!prandom_u32_max(2); + size_t size = get_random_u32_below(MAX_ENCODABLE_SIZE) + 1; + bool is_write = !!get_random_u32_below(2); unsigned long verif_masked_addr; long encoded_watchpoint; bool verif_is_write; diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 43efb2a04160..29dc253d03af 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -399,7 +399,7 @@ static int *get_random_order(int count) order[n] = n;

for (n = count - 1; n > 1; n--) { - r = prandom_u32_max(n + 1); + r = get_random_u32_below(n + 1); if (r != n) { tmp = order[n]; order[n] = order[r]; @@ -538,7 +538,7 @@ static void stress_one_work(struct work_struct *work) { struct stress *stress = container_of(work, typeof(*stress), work); const int nlocks = stress->nlocks; - struct ww_mutex *lock = stress->locks + prandom_u32_max(nlocks); + struct ww_mutex *lock = stress->locks + get_random_u32_below(nlocks); int err;

do { diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 8058bec87ace..9cf32ccda715 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -310,7 +310,7 @@ static void clocksource_verify_choose_cpus(void) * CPUs that are currently online. */ for (i = 1; i < n; i++) { - cpu = prandom_u32_max(nr_cpu_ids); + cpu = get_random_u32_below(nr_cpu_ids); cpu = cpumask_next(cpu - 1, cpu_online_mask); if (cpu >= nr_cpu_ids) cpu = cpumask_first(cpu_online_mask); diff --git a/lib/fault-inject.c b/lib/fault-inject.c index 96e092de5b72..9f53408c545d 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -139,7 +139,7 @@ bool should_fail(struct fault_attr *attr, ssize_t size) return false; }

- if (attr->probability <= prandom_u32_max(100)) + if (attr->probability <= get_random_u32_below(100)) return false;

if (!fail_stacktrace(attr)) diff --git a/lib/find_bit_benchmark.c b/lib/find_bit_benchmark.c index 7c3c011abd29..d3fb09e6eff1 100644 --- a/lib/find_bit_benchmark.c +++ b/lib/find_bit_benchmark.c @@ -174,8 +174,8 @@ static int __init find_bit_test(void) bitmap_zero(bitmap2, BITMAP_LEN);

while (nbits--) { - __set_bit(prandom_u32_max(BITMAP_LEN), bitmap); - __set_bit(prandom_u32_max(BITMAP_LEN), bitmap2); + __set_bit(get_random_u32_below(BITMAP_LEN), bitmap); + __set_bit(get_random_u32_below(BITMAP_LEN), bitmap2); }

test_find_next_bit(bitmap, BITMAP_LEN); diff --git a/lib/kobject.c b/lib/kobject.c index a0b2dbfcfa23..af1f5f2954d4 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -694,7 +694,7 @@ static void kobject_release(struct kref *kref) { struct kobject *kobj = container_of(kref, struct kobject, kref); #ifdef CONFIG_DEBUG_KOBJECT_RELEASE - unsigned long delay = HZ + HZ * prandom_u32_max(4); + unsigned long delay = HZ + HZ * get_random_u32_below(4); pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n", kobject_name(kobj), kobj, __func__, kobj->parent, delay); INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); diff --git a/lib/reed_solomon/test_rslib.c b/lib/reed_solomon/test_rslib.c index 848e7eb5da92..75cb1adac884 100644 --- a/lib/reed_solomon/test_rslib.c +++ b/lib/reed_solomon/test_rslib.c @@ -183,7 +183,7 @@ static int get_rcw_we(struct rs_control *rs, struct wspace *ws,

do { /* Must not choose the same location twice */ - errloc = prandom_u32_max(len); + errloc = get_random_u32_below(len); } while (errlocs[errloc] != 0);

errlocs[errloc] = 1; @@ -194,12 +194,12 @@ static int get_rcw_we(struct rs_control *rs, struct wspace *ws, for (i = 0; i < eras; i++) { do { /* Must not choose the same location twice */ - errloc = prandom_u32_max(len); + errloc = get_random_u32_below(len); } while (errlocs[errloc] != 0);

derrlocs[i] = errloc;

- if (ewsc && prandom_u32_max(2)) { + if (ewsc && get_random_u32_below(2)) { /* Erasure with the symbol intact */ errlocs[errloc] = 2; } else { diff --git a/lib/sbitmap.c b/lib/sbitmap.c index 7280ae8ca88c..58de526ff051 100644 --- a/lib/sbitmap.c +++ b/lib/sbitmap.c @@ -21,7 +21,7 @@ static int init_alloc_hint(struct sbitmap *sb, gfp_t flags) int i;

for_each_possible_cpu(i) - *per_cpu_ptr(sb->alloc_hint, i) = prandom_u32_max(depth); + *per_cpu_ptr(sb->alloc_hint, i) = get_random_u32_below(depth); } return 0; } @@ -33,7 +33,7 @@ static inline unsigned update_alloc_hint_before_get(struct sbitmap *sb,

hint = this_cpu_read(*sb->alloc_hint); if (unlikely(hint >= depth)) { - hint = depth ? prandom_u32_max(depth) : 0; + hint = depth ? get_random_u32_below(depth) : 0; this_cpu_write(*sb->alloc_hint, hint); }

diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c index 86fadd3ba08c..41d3447bc3b4 100644 --- a/lib/test-string_helpers.c +++ b/lib/test-string_helpers.c @@ -587,7 +587,7 @@ static int __init test_string_helpers_init(void) for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++) test_string_unescape("unescape", i, false); test_string_unescape("unescape inplace", - prandom_u32_max(UNESCAPE_ANY + 1), true); + get_random_u32_below(UNESCAPE_ANY + 1), true);

/* Without dictionary */ for (i = 0; i < ESCAPE_ALL_MASK + 1; i++) diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c index 0927f44cd478..efc50fd30a44 100644 --- a/lib/test_hexdump.c +++ b/lib/test_hexdump.c @@ -149,7 +149,7 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize, static void __init test_hexdump_set(int rowsize, bool ascii) { size_t d = min_t(size_t, sizeof(data_b), rowsize); - size_t len = prandom_u32_max(d) + 1; + size_t len = get_random_u32_below(d) + 1;

test_hexdump(len, rowsize, 4, ascii); test_hexdump(len, rowsize, 2, ascii); @@ -208,11 +208,11 @@ static void __init test_hexdump_overflow(size_t buflen, size_t len, static void __init test_hexdump_overflow_set(size_t buflen, bool ascii) { unsigned int i = 0; - int rs = (prandom_u32_max(2) + 1) * 16; + int rs = (get_random_u32_below(2) + 1) * 16;

do { int gs = 1 << i; - size_t len = prandom_u32_max(rs) + gs; + size_t len = get_random_u32_below(rs) + gs;

test_hexdump_overflow(buflen, rounddown(len, gs), rs, gs, ascii); } while (i++ < 3); @@ -223,11 +223,11 @@ static int __init test_hexdump_init(void) unsigned int i; int rowsize;

- rowsize = (prandom_u32_max(2) + 1) * 16; + rowsize = (get_random_u32_below(2) + 1) * 16; for (i = 0; i < 16; i++) test_hexdump_set(rowsize, false);

- rowsize = (prandom_u32_max(2) + 1) * 16; + rowsize = (get_random_u32_below(2) + 1) * 16; for (i = 0; i < 16; i++) test_hexdump_set(rowsize, true);

diff --git a/lib/test_list_sort.c b/lib/test_list_sort.c index 19ff229b9c3a..cc5f335f29b5 100644 --- a/lib/test_list_sort.c +++ b/lib/test_list_sort.c @@ -71,7 +71,7 @@ static void list_sort_test(struct kunit *test) KUNIT_ASSERT_NOT_ERR_OR_NULL(test, el);

/* force some equivalencies */ - el->value = prandom_u32_max(TEST_LIST_LEN / 3); + el->value = get_random_u32_below(TEST_LIST_LEN / 3); el->serial = i; el->poison1 = TEST_POISON1; el->poison2 = TEST_POISON2; diff --git a/lib/test_printf.c b/lib/test_printf.c index 4bd15a593fbd..6d10187eddac 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -126,7 +126,7 @@ __test(const char *expect, int elen, const char *fmt, ...) * be able to print it as expected. */ failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap); - rand = 1 + prandom_u32_max(elen+1); + rand = 1 + get_random_u32_below(elen + 1); /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */ failed_tests += do_test(rand, expect, elen, fmt, ap); failed_tests += do_test(0, expect, elen, fmt, ap); diff --git a/lib/test_rhashtable.c b/lib/test_rhashtable.c index f2ba5787055a..6a8e445c8b55 100644 --- a/lib/test_rhashtable.c +++ b/lib/test_rhashtable.c @@ -368,8 +368,8 @@ static int __init test_rhltable(unsigned int entries)

pr_info("test %d random rhlist add/delete operations\n", entries); for (j = 0; j < entries; j++) { - u32 i = prandom_u32_max(entries); - u32 prand = prandom_u32_max(4); + u32 i = get_random_u32_below(entries); + u32 prand = get_random_u32_below(4);

cond_resched();

@@ -396,7 +396,7 @@ static int __init test_rhltable(unsigned int entries) }

if (prand & 2) { - i = prandom_u32_max(entries); + i = get_random_u32_below(entries); if (test_bit(i, obj_in_table)) { err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); WARN(err, "cannot remove element at slot %d", i); diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c index cf7780572f5b..104f09ea5fcc 100644 --- a/lib/test_vmalloc.c +++ b/lib/test_vmalloc.c @@ -151,7 +151,7 @@ static int random_size_alloc_test(void) int i;

for (i = 0; i < test_loop_count; i++) { - n = prandom_u32_max(100) + 1; + n = get_random_u32_below(100) + 1; p = vmalloc(n * PAGE_SIZE);

if (!p) @@ -291,12 +291,12 @@ pcpu_alloc_test(void) return -1;

for (i = 0; i < 35000; i++) { - size = prandom_u32_max(PAGE_SIZE / 4) + 1; + size = get_random_u32_below(PAGE_SIZE / 4) + 1;

/* * Maximum PAGE_SIZE */ - align = 1 << (prandom_u32_max(11) + 1); + align = 1 << (get_random_u32_below(11) + 1);

pcpu[i] = __alloc_percpu(size, align); if (!pcpu[i]) @@ -391,7 +391,7 @@ static void shuffle_array(int *arr, int n)

for (i = n - 1; i > 0; i--) { /* Cut the range. */ - j = prandom_u32_max(i); + j = get_random_u32_below(i);

/* Swap indexes. */ swap(arr[i], arr[j]); diff --git a/mm/kasan/kasan_test.c b/mm/kasan/kasan_test.c index 0d59098f0876..640f9c7f8e44 100644 --- a/mm/kasan/kasan_test.c +++ b/mm/kasan/kasan_test.c @@ -1299,7 +1299,7 @@ static void match_all_not_assigned(struct kunit *test) KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);

for (i = 0; i < 256; i++) { - size = prandom_u32_max(1024) + 1; + size = get_random_u32_below(1024) + 1; ptr = kmalloc(size, GFP_KERNEL); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr); KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN); @@ -1308,7 +1308,7 @@ static void match_all_not_assigned(struct kunit *test) }

for (i = 0; i < 256; i++) { - order = prandom_u32_max(4) + 1; + order = get_random_u32_below(4) + 1; pages = alloc_pages(GFP_KERNEL, order); ptr = page_address(pages); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr); @@ -1321,7 +1321,7 @@ static void match_all_not_assigned(struct kunit *test) return;

for (i = 0; i < 256; i++) { - size = prandom_u32_max(1024) + 1; + size = get_random_u32_below(1024) + 1; ptr = vmalloc(size); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr); KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN); diff --git a/mm/kfence/core.c b/mm/kfence/core.c index 141788858b70..6cbd93f2007b 100644 --- a/mm/kfence/core.c +++ b/mm/kfence/core.c @@ -360,9 +360,9 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g unsigned long flags; struct slab *slab; void *addr; - const bool random_right_allocate = prandom_u32_max(2); + const bool random_right_allocate = get_random_u32_below(2); const bool random_fault = CONFIG_KFENCE_STRESS_TEST_FAULTS && - !prandom_u32_max(CONFIG_KFENCE_STRESS_TEST_FAULTS); + !get_random_u32_below(CONFIG_KFENCE_STRESS_TEST_FAULTS);

/* Try to obtain a free object. */ raw_spin_lock_irqsave(&kfence_freelist_lock, flags); diff --git a/mm/kfence/kfence_test.c b/mm/kfence/kfence_test.c index a97bffe0cc3e..20028c179796 100644 --- a/mm/kfence/kfence_test.c +++ b/mm/kfence/kfence_test.c @@ -532,8 +532,8 @@ static void test_free_bulk(struct kunit *test) int iter;

for (iter = 0; iter < 5; iter++) { - const size_t size = setup_test_cache(test, 8 + prandom_u32_max(300), 0, - (iter & 1) ? ctor_set_x : NULL); + const size_t size = setup_test_cache(test, 8 + get_random_u32_below(300), + 0, (iter & 1) ? ctor_set_x : NULL); void *objects[] = { test_alloc(test, size, GFP_KERNEL, ALLOCATE_RIGHT), test_alloc(test, size, GFP_KERNEL, ALLOCATE_NONE), diff --git a/mm/slub.c b/mm/slub.c index 157527d7101b..7cd2c657030a 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1881,7 +1881,7 @@ static bool shuffle_freelist(struct kmem_cache *s, struct slab *slab) return false;

freelist_count = oo_objects(s->oo); - pos = prandom_u32_max(freelist_count); + pos = get_random_u32_below(freelist_count);

page_limit = slab->objects * s->size; start = fixup_red_left(s, slab_address(slab)); diff --git a/mm/swapfile.c b/mm/swapfile.c index 5fc1237a9f21..e9318305a24a 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -773,7 +773,7 @@ static void set_cluster_next(struct swap_info_struct *si, unsigned long next) if (si->highest_bit <= si->lowest_bit) return; next = si->lowest_bit + - prandom_u32_max(si->highest_bit - si->lowest_bit + 1); + get_random_u32_below(si->highest_bit - si->lowest_bit + 1); next = ALIGN_DOWN(next, SWAP_ADDRESS_SPACE_PAGES); next = max_t(unsigned int, next, si->lowest_bit); } @@ -3089,7 +3089,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) */ for_each_possible_cpu(cpu) { per_cpu(*p->cluster_next_cpu, cpu) = - 1 + prandom_u32_max(p->highest_bit); + 1 + get_random_u32_below(p->highest_bit); } nr_cluster = DIV_ROUND_UP(maxpages, SWAPFILE_CLUSTER);

diff --git a/net/802/garp.c b/net/802/garp.c index fc9eb02a912f..77aac2763835 100644 --- a/net/802/garp.c +++ b/net/802/garp.c @@ -407,7 +407,7 @@ static void garp_join_timer_arm(struct garp_applicant *app) { unsigned long delay;

- delay = prandom_u32_max(msecs_to_jiffies(garp_join_time)); + delay = get_random_u32_below(msecs_to_jiffies(garp_join_time)); mod_timer(&app->join_timer, jiffies + delay); }

diff --git a/net/802/mrp.c b/net/802/mrp.c index 155f74d8b14f..8c6f0381023b 100644 --- a/net/802/mrp.c +++ b/net/802/mrp.c @@ -592,7 +592,7 @@ static void mrp_join_timer_arm(struct mrp_applicant *app) { unsigned long delay;

- delay = prandom_u32_max(msecs_to_jiffies(mrp_join_time)); + delay = get_random_u32_below(msecs_to_jiffies(mrp_join_time)); mod_timer(&app->join_timer, jiffies + delay); }

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 7f6a7c96ac92..114ee5da261f 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -280,7 +280,7 @@ batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) unsigned int msecs;

msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; - msecs += prandom_u32_max(2 * BATADV_JITTER); + msecs += get_random_u32_below(2 * BATADV_JITTER);

return jiffies + msecs_to_jiffies(msecs); } @@ -288,7 +288,7 @@ batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) /* when do we schedule a ogm packet to be sent */ static unsigned long batadv_iv_ogm_fwd_send_time(void) { - return jiffies + msecs_to_jiffies(prandom_u32_max(BATADV_JITTER / 2)); + return jiffies + msecs_to_jiffies(get_random_u32_below(BATADV_JITTER / 2)); }

/* apply hop penalty for a normal link */ diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c index f1741fbfb617..f9a58fb5442e 100644 --- a/net/batman-adv/bat_v_elp.c +++ b/net/batman-adv/bat_v_elp.c @@ -51,7 +51,7 @@ static void batadv_v_elp_start_timer(struct batadv_hard_iface *hard_iface) unsigned int msecs;

msecs = atomic_read(&hard_iface->bat_v.elp_interval) - BATADV_JITTER; - msecs += prandom_u32_max(2 * BATADV_JITTER); + msecs += get_random_u32_below(2 * BATADV_JITTER);

queue_delayed_work(batadv_event_workqueue, &hard_iface->bat_v.elp_wq, msecs_to_jiffies(msecs)); diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c index 033639df96d8..addfd8c4fe95 100644 --- a/net/batman-adv/bat_v_ogm.c +++ b/net/batman-adv/bat_v_ogm.c @@ -90,7 +90,7 @@ static void batadv_v_ogm_start_queue_timer(struct batadv_hard_iface *hard_iface) unsigned int msecs = BATADV_MAX_AGGREGATION_MS * 1000;

/* msecs * [0.9, 1.1] */ - msecs += prandom_u32_max(msecs / 5) - (msecs / 10); + msecs += get_random_u32_below(msecs / 5) - (msecs / 10); queue_delayed_work(batadv_event_workqueue, &hard_iface->bat_v.aggr_wq, msecs_to_jiffies(msecs / 1000)); } @@ -109,7 +109,7 @@ static void batadv_v_ogm_start_timer(struct batadv_priv *bat_priv) return;

msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; - msecs += prandom_u32_max(2 * BATADV_JITTER); + msecs += get_random_u32_below(2 * BATADV_JITTER); queue_delayed_work(batadv_event_workqueue, &bat_priv->bat_v.ogm_wq, msecs_to_jiffies(msecs)); } diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index 5f4aeeb60dc4..bf29fba4dde5 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c @@ -1009,7 +1009,7 @@ static struct batadv_nc_path *batadv_nc_get_path(struct batadv_priv *bat_priv, static u8 batadv_nc_random_weight_tq(u8 tq) { /* randomize the estimated packet loss (max TQ - estimated TQ) */ - u8 rand_tq = prandom_u32_max(BATADV_TQ_MAX_VALUE + 1 - tq); + u8 rand_tq = get_random_u32_below(BATADV_TQ_MAX_VALUE + 1 - tq);

/* convert to (randomized) estimated tq again */ return BATADV_TQ_MAX_VALUE - rand_tq; diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index a92e7e485feb..b2f9679066c4 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -7374,8 +7374,8 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data, * calculate conn info age as random value between min/max set in hdev. */ conn_info_age = hdev->conn_info_min_age + - prandom_u32_max(hdev->conn_info_max_age - - hdev->conn_info_min_age); + get_random_u32_below(hdev->conn_info_max_age - + hdev->conn_info_min_age);

/* Query controller to refresh cached values if they are too old or were * never read. diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c index b670ba03a675..7e90f9e61d9b 100644 --- a/net/can/j1939/socket.c +++ b/net/can/j1939/socket.c @@ -189,7 +189,7 @@ activate_next: int time_ms = 0;

if (err) - time_ms = 10 + prandom_u32_max(16); + time_ms = 10 + get_random_u32_below(16);

j1939_tp_schedule_txtimer(first, time_ms); } diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c index 55f29c9f9e08..67d36776aff4 100644 --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -1168,7 +1168,7 @@ static enum hrtimer_restart j1939_tp_txtimer(struct hrtimer *hrtimer) if (session->tx_retry < J1939_XTP_TX_RETRY_LIMIT) { session->tx_retry++; j1939_tp_schedule_txtimer(session, - 10 + prandom_u32_max(16)); + 10 + get_random_u32_below(16)); } else { netdev_alert(priv->ndev, "%s: 0x%p: tx retry count reached\n", __func__, session); diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index db60217f911b..faabad6603db 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -222,7 +222,7 @@ static void pick_new_mon(struct ceph_mon_client *monc) max--; }

- n = prandom_u32_max(max); + n = get_random_u32_below(max); if (o >= 0 && n >= o) n++;

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 4e4f1e4bc265..11c04e7d928e 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -1479,7 +1479,7 @@ static bool target_should_be_paused(struct ceph_osd_client *osdc,

static int pick_random_replica(const struct ceph_osds *acting) { - int i = prandom_u32_max(acting->size); + int i = get_random_u32_below(acting->size);

dout("%s picked osd%d, primary osd%d\n", __func__, acting->osds[i], acting->primary); diff --git a/net/core/neighbour.c b/net/core/neighbour.c index a77a85e357e0..ba92762de525 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -111,7 +111,7 @@ static void neigh_cleanup_and_release(struct neighbour *neigh)

unsigned long neigh_rand_reach_time(unsigned long base) { - return base ? prandom_u32_max(base) + (base >> 1) : 0; + return base ? get_random_u32_below(base) + (base >> 1) : 0; } EXPORT_SYMBOL(neigh_rand_reach_time);

@@ -1652,7 +1652,7 @@ void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p, struct sk_buff *skb) { unsigned long sched_next = jiffies + - prandom_u32_max(NEIGH_VAR(p, PROXY_DELAY)); + get_random_u32_below(NEIGH_VAR(p, PROXY_DELAY));

if (p->qlen > NEIGH_VAR(p, PROXY_QLEN)) { kfree_skb(skb); diff --git a/net/core/pktgen.c b/net/core/pktgen.c index c3763056c554..95da2ddc1c20 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -2324,7 +2324,7 @@ static inline int f_pick(struct pktgen_dev *pkt_dev) pkt_dev->curfl = 0; /*reset */ } } else { - flow = prandom_u32_max(pkt_dev->cflows); + flow = get_random_u32_below(pkt_dev->cflows); pkt_dev->curfl = flow;

if (pkt_dev->flows[flow].count > pkt_dev->lflow) { @@ -2380,8 +2380,8 @@ static void set_cur_queue_map(struct pktgen_dev *pkt_dev) else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { __u16 t; if (pkt_dev->flags & F_QUEUE_MAP_RND) { - t = prandom_u32_max(pkt_dev->queue_map_max - - pkt_dev->queue_map_min + 1) + + t = get_random_u32_below(pkt_dev->queue_map_max - + pkt_dev->queue_map_min + 1) + pkt_dev->queue_map_min; } else { t = pkt_dev->cur_queue_map + 1; @@ -2411,7 +2411,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) __u32 tmp;

if (pkt_dev->flags & F_MACSRC_RND) - mc = prandom_u32_max(pkt_dev->src_mac_count); + mc = get_random_u32_below(pkt_dev->src_mac_count); else { mc = pkt_dev->cur_src_mac_offset++; if (pkt_dev->cur_src_mac_offset >= @@ -2437,7 +2437,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) __u32 tmp;

if (pkt_dev->flags & F_MACDST_RND) - mc = prandom_u32_max(pkt_dev->dst_mac_count); + mc = get_random_u32_below(pkt_dev->dst_mac_count);

else { mc = pkt_dev->cur_dst_mac_offset++; @@ -2469,16 +2469,16 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) }

if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { - pkt_dev->vlan_id = prandom_u32_max(4096); + pkt_dev->vlan_id = get_random_u32_below(4096); }

if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { - pkt_dev->svlan_id = prandom_u32_max(4096); + pkt_dev->svlan_id = get_random_u32_below(4096); }

if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { if (pkt_dev->flags & F_UDPSRC_RND) - pkt_dev->cur_udp_src = prandom_u32_max( + pkt_dev->cur_udp_src = get_random_u32_below( pkt_dev->udp_src_max - pkt_dev->udp_src_min) + pkt_dev->udp_src_min;

@@ -2491,7 +2491,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)

if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { if (pkt_dev->flags & F_UDPDST_RND) { - pkt_dev->cur_udp_dst = prandom_u32_max( + pkt_dev->cur_udp_dst = get_random_u32_below( pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) + pkt_dev->udp_dst_min; } else { @@ -2508,7 +2508,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) if (imn < imx) { __u32 t; if (pkt_dev->flags & F_IPSRC_RND) - t = prandom_u32_max(imx - imn) + imn; + t = get_random_u32_below(imx - imn) + imn; else { t = ntohl(pkt_dev->cur_saddr); t++; @@ -2530,7 +2530,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) if (pkt_dev->flags & F_IPDST_RND) {

do { - t = prandom_u32_max(imx - imn) + + t = get_random_u32_below(imx - imn) + imn; s = htonl(t); } while (ipv4_is_loopback(s) || @@ -2578,8 +2578,8 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { __u32 t; if (pkt_dev->flags & F_TXSIZE_RND) { - t = prandom_u32_max(pkt_dev->max_pkt_size - - pkt_dev->min_pkt_size) + + t = get_random_u32_below(pkt_dev->max_pkt_size - + pkt_dev->min_pkt_size) + pkt_dev->min_pkt_size; } else { t = pkt_dev->cur_pkt_size + 1; @@ -2589,7 +2589,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev) pkt_dev->cur_pkt_size = t; } else if (pkt_dev->n_imix_entries > 0) { struct imix_pkt *entry; - __u32 t = prandom_u32_max(IMIX_PRECISION); + __u32 t = get_random_u32_below(IMIX_PRECISION); __u8 entry_index = pkt_dev->imix_distribution[t];

entry = &pkt_dev->imix_entries[entry_index]; diff --git a/net/core/stream.c b/net/core/stream.c index 75fded8495f5..5b1fe2b82eac 100644 --- a/net/core/stream.c +++ b/net/core/stream.c @@ -123,7 +123,7 @@ int sk_stream_wait_memory(struct sock *sk, long *timeo_p) DEFINE_WAIT_FUNC(wait, woken_wake_function);

if (sk_stream_memory_free(sk)) - current_timeo = vm_wait = prandom_u32_max(HZ / 5) + 2; + current_timeo = vm_wait = get_random_u32_below(HZ / 5) + 2;

add_wait_queue(sk_sleep(sk), &wait);

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index d5d745c3e345..46aa2d65e40a 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -263,7 +263,7 @@ bool icmp_global_allow(void) /* We want to use a credit of one in average, but need to randomize * it for security reasons. */ - credit = max_t(int, credit - prandom_u32_max(3), 0); + credit = max_t(int, credit - get_random_u32_below(3), 0); rc = true; } WRITE_ONCE(icmp_global.credit, credit); diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 81be3e0f0e70..c920aa9a62a9 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -213,7 +213,7 @@ static void igmp_stop_timer(struct ip_mc_list *im) /* It must be called with locked im->lock */ static void igmp_start_timer(struct ip_mc_list *im, int max_delay) { - int tv = prandom_u32_max(max_delay); + int tv = get_random_u32_below(max_delay);

im->tm_running = 1; if (!mod_timer(&im->timer, jiffies+tv+2)) @@ -222,7 +222,7 @@ static void igmp_start_timer(struct ip_mc_list *im, int max_delay)

static void igmp_gq_start_timer(struct in_device *in_dev) { - int tv = prandom_u32_max(in_dev->mr_maxdelay); + int tv = get_random_u32_below(in_dev->mr_maxdelay); unsigned long exp = jiffies + tv + 2;

if (in_dev->mr_gq_running && @@ -236,7 +236,7 @@ static void igmp_gq_start_timer(struct in_device *in_dev)

static void igmp_ifc_start_timer(struct in_device *in_dev, int delay) { - int tv = prandom_u32_max(delay); + int tv = get_random_u32_below(delay);

if (!mod_timer(&in_dev->mr_ifc_timer, jiffies+tv+2)) in_dev_hold(in_dev); diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 4e84ed21d16f..f22051219b50 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -314,7 +314,7 @@ other_half_scan: if (likely(remaining > 1)) remaining &= ~1U;

- offset = prandom_u32_max(remaining); + offset = get_random_u32_below(remaining); /* __inet_hash_connect() favors ports having @low parity * We do the opposite to not pollute connect() users. */ diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index d3dc28156622..a879ec1a267d 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -1037,7 +1037,7 @@ ok: * on low contention the randomness is maximal and on high contention * it may be inexistent. */ - i = max_t(int, i, prandom_u32_max(8) * 2); + i = max_t(int, i, get_random_u32_below(8) * 2); WRITE_ONCE(table_perturb[index], READ_ONCE(table_perturb[index]) + i + 2);

/* Head lock still held and bh's disabled */ diff --git a/net/ipv4/route.c b/net/ipv4/route.c index cd1fa9f70f1a..de6e3515ab4f 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -471,7 +471,7 @@ static u32 ip_idents_reserve(u32 hash, int segs) old = READ_ONCE(*p_tstamp);

if (old != now && cmpxchg(p_tstamp, old, now) == old) - delta = prandom_u32_max(now - old); + delta = get_random_u32_below(now - old);

/* If UBSAN reports an error there, please make sure your compiler * supports -fno-strict-overflow before reporting it that was a bug @@ -689,7 +689,7 @@ static void update_or_create_fnhe(struct fib_nh_common *nhc, __be32 daddr, } else { /* Randomize max depth to avoid some side channels attacks. */ int max_depth = FNHE_RECLAIM_DEPTH + - prandom_u32_max(FNHE_RECLAIM_DEPTH); + get_random_u32_below(FNHE_RECLAIM_DEPTH);

while (depth > max_depth) { fnhe_remove_oldest(hash); diff --git a/net/ipv4/tcp_bbr.c b/net/ipv4/tcp_bbr.c index 54eec33c6e1c..d2c470524e58 100644 --- a/net/ipv4/tcp_bbr.c +++ b/net/ipv4/tcp_bbr.c @@ -618,7 +618,7 @@ static void bbr_reset_probe_bw_mode(struct sock *sk) struct bbr *bbr = inet_csk_ca(sk);

bbr->mode = BBR_PROBE_BW; - bbr->cycle_idx = CYCLE_LEN - 1 - prandom_u32_max(bbr_cycle_rand); + bbr->cycle_idx = CYCLE_LEN - 1 - get_random_u32_below(bbr_cycle_rand); bbr_advance_cycle_phase(sk); /* flip to next phase of gain cycle */ }

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 0640453fce54..3b076e5ba932 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3646,7 +3646,8 @@ static void tcp_send_challenge_ack(struct sock *sk) u32 half = (ack_limit + 1) >> 1;

WRITE_ONCE(net->ipv4.tcp_challenge_timestamp, now); - WRITE_ONCE(net->ipv4.tcp_challenge_count, half + prandom_u32_max(ack_limit)); + WRITE_ONCE(net->ipv4.tcp_challenge_count, + half + get_random_u32_below(ack_limit)); } count = READ_ONCE(net->ipv4.tcp_challenge_count); if (count > 0) { diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 9c3f5202a97b..daf89a2eb492 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -104,7 +104,7 @@ static inline u32 cstamp_delta(unsigned long cstamp) static inline s32 rfc3315_s14_backoff_init(s32 irt) { /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ - u64 tmp = (900000 + prandom_u32_max(200001)) * (u64)irt; + u64 tmp = (900000 + get_random_u32_below(200001)) * (u64)irt; do_div(tmp, 1000000); return (s32)tmp; } @@ -112,11 +112,11 @@ static inline s32 rfc3315_s14_backoff_init(s32 irt) static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) { /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ - u64 tmp = (1900000 + prandom_u32_max(200001)) * (u64)rt; + u64 tmp = (1900000 + get_random_u32_below(200001)) * (u64)rt; do_div(tmp, 1000000); if ((s32)tmp > mrt) { /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ - tmp = (900000 + prandom_u32_max(200001)) * (u64)mrt; + tmp = (900000 + get_random_u32_below(200001)) * (u64)mrt; do_div(tmp, 1000000); } return (s32)tmp; @@ -3967,7 +3967,7 @@ static void addrconf_dad_kick(struct inet6_ifaddr *ifp) if (ifp->flags & IFA_F_OPTIMISTIC) rand_num = 0; else - rand_num = prandom_u32_max(idev->cnf.rtr_solicit_delay ?: 1); + rand_num = get_random_u32_below(idev->cnf.rtr_solicit_delay ? : 1);

nonce = 0; if (idev->cnf.enhanced_dad || diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 7860383295d8..1c02160cf7a4 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -1050,7 +1050,7 @@ bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, /* called with mc_lock */ static void mld_gq_start_work(struct inet6_dev *idev) { - unsigned long tv = prandom_u32_max(idev->mc_maxdelay); + unsigned long tv = get_random_u32_below(idev->mc_maxdelay);

idev->mc_gq_running = 1; if (!mod_delayed_work(mld_wq, &idev->mc_gq_work, tv + 2)) @@ -1068,7 +1068,7 @@ static void mld_gq_stop_work(struct inet6_dev *idev) /* called with mc_lock */ static void mld_ifc_start_work(struct inet6_dev *idev, unsigned long delay) { - unsigned long tv = prandom_u32_max(delay); + unsigned long tv = get_random_u32_below(delay);

if (!mod_delayed_work(mld_wq, &idev->mc_ifc_work, tv + 2)) in6_dev_hold(idev); @@ -1085,7 +1085,7 @@ static void mld_ifc_stop_work(struct inet6_dev *idev) /* called with mc_lock */ static void mld_dad_start_work(struct inet6_dev *idev, unsigned long delay) { - unsigned long tv = prandom_u32_max(delay); + unsigned long tv = get_random_u32_below(delay);

if (!mod_delayed_work(mld_wq, &idev->mc_dad_work, tv + 2)) in6_dev_hold(idev); @@ -1130,7 +1130,7 @@ static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) }

if (delay >= resptime) - delay = prandom_u32_max(resptime); + delay = get_random_u32_below(resptime);

if (!mod_delayed_work(mld_wq, &ma->mca_work, delay)) refcount_inc(&ma->mca_refcnt); @@ -2574,7 +2574,7 @@ static void igmp6_join_group(struct ifmcaddr6 *ma)

igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);

- delay = prandom_u32_max(unsolicited_report_interval(ma->idev)); + delay = get_random_u32_below(unsolicited_report_interval(ma->idev));

if (cancel_delayed_work(&ma->mca_work)) { refcount_dec(&ma->mca_refcnt); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 2f355f0ec32a..e74e0361fd92 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1713,7 +1713,7 @@ static int rt6_insert_exception(struct rt6_info *nrt, net->ipv6.rt6_stats->fib_rt_cache++;

/* Randomize max depth to avoid some side channels attacks. */ - max_depth = FIB6_MAX_DEPTH + prandom_u32_max(FIB6_MAX_DEPTH); + max_depth = FIB6_MAX_DEPTH + get_random_u32_below(FIB6_MAX_DEPTH); while (bucket->depth > max_depth) rt6_exception_remove_oldest(bucket);

diff --git a/net/netfilter/ipvs/ip_vs_twos.c b/net/netfilter/ipvs/ip_vs_twos.c index f2579fc9c75b..3308e4cc740a 100644 --- a/net/netfilter/ipvs/ip_vs_twos.c +++ b/net/netfilter/ipvs/ip_vs_twos.c @@ -71,8 +71,8 @@ static struct ip_vs_dest *ip_vs_twos_schedule(struct ip_vs_service *svc, * from 0 to total_weight */ total_weight += 1; - rweight1 = prandom_u32_max(total_weight); - rweight2 = prandom_u32_max(total_weight); + rweight1 = get_random_u32_below(total_weight); + rweight2 = get_random_u32_below(total_weight);

/* Pick two weighted servers */ list_for_each_entry_rcu(dest, &svc->destinations, n_list) { diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index f97bda06d2a9..8703812405eb 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -906,7 +906,7 @@ nf_conntrack_hash_check_insert(struct nf_conn *ct) nf_ct_zone_id(nf_ct_zone(ct), IP_CT_DIR_REPLY)); } while (nf_conntrack_double_lock(net, hash, reply_hash, sequence));

- max_chainlen = MIN_CHAINLEN + prandom_u32_max(MAX_CHAINLEN); + max_chainlen = MIN_CHAINLEN + get_random_u32_below(MAX_CHAINLEN);

/* See if there's one in the list already, including reverse */ hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[hash], hnnode) { @@ -1227,7 +1227,7 @@ __nf_conntrack_confirm(struct sk_buff *skb) goto dying; }

- max_chainlen = MIN_CHAINLEN + prandom_u32_max(MAX_CHAINLEN); + max_chainlen = MIN_CHAINLEN + get_random_u32_below(MAX_CHAINLEN); /* See if there's one in the list already, including reverse: NAT could have grabbed it without realizing, since we're not in the hash. If there is, we lost race. */ diff --git a/net/netfilter/nf_nat_helper.c b/net/netfilter/nf_nat_helper.c index a95a25196943..bf591e6af005 100644 --- a/net/netfilter/nf_nat_helper.c +++ b/net/netfilter/nf_nat_helper.c @@ -223,7 +223,7 @@ u16 nf_nat_exp_find_port(struct nf_conntrack_expect *exp, u16 port) if (res != -EBUSY || (--attempts_left < 0)) break;

- port = min + prandom_u32_max(range); + port = min + get_random_u32_below(range); }

return 0; diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index a662e8a5ff84..7a401d94463a 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -835,7 +835,7 @@ retry: /* Bind collision, search negative portid values. */ if (rover == -4096) /* rover will be in range [S32_MIN, -4097] */ - rover = S32_MIN + prandom_u32_max(-4096 - S32_MIN); + rover = S32_MIN + get_random_u32_below(-4096 - S32_MIN); else if (rover >= -4096) rover = -4097; portid = rover--; diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 6ce8dd19f33c..51a47ade92e8 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1350,7 +1350,7 @@ static bool fanout_flow_is_huge(struct packet_sock *po, struct sk_buff *skb) if (READ_ONCE(history[i]) == rxhash) count++;

- victim = prandom_u32_max(ROLLOVER_HLEN); + victim = get_random_u32_below(ROLLOVER_HLEN);

/* Avoid dirtying the cache line if possible */ if (READ_ONCE(history[victim]) != rxhash) @@ -1386,7 +1386,7 @@ static unsigned int fanout_demux_rnd(struct packet_fanout *f, struct sk_buff *skb, unsigned int num) { - return prandom_u32_max(num); + return get_random_u32_below(num); }

static unsigned int fanout_demux_rollover(struct packet_fanout *f, diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c index 62d682b96b88..be267ffaaba7 100644 --- a/net/sched/act_gact.c +++ b/net/sched/act_gact.c @@ -25,7 +25,7 @@ static struct tc_action_ops act_gact_ops; static int gact_net_rand(struct tcf_gact *gact) { smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */ - if (prandom_u32_max(gact->tcfg_pval)) + if (get_random_u32_below(gact->tcfg_pval)) return gact->tcf_action; return gact->tcfg_paction; } diff --git a/net/sched/act_sample.c b/net/sched/act_sample.c index 7a25477f5d99..4194480746b0 100644 --- a/net/sched/act_sample.c +++ b/net/sched/act_sample.c @@ -168,7 +168,7 @@ static int tcf_sample_act(struct sk_buff *skb, const struct tc_action *a, psample_group = rcu_dereference_bh(s->psample_group);

/* randomly sample packets according to rate */ - if (psample_group && (prandom_u32_max(s->rate) == 0)) { + if (psample_group && (get_random_u32_below(s->rate) == 0)) { if (!skb_at_tc_ingress(skb)) { md.in_ifindex = skb->skb_iif; md.out_ifindex = skb->dev->ifindex; diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c index 3ac3e5c80b6f..19c851125901 100644 --- a/net/sched/sch_choke.c +++ b/net/sched/sch_choke.c @@ -183,7 +183,7 @@ static struct sk_buff *choke_peek_random(const struct choke_sched_data *q, int retrys = 3;

do { - *pidx = (q->head + prandom_u32_max(choke_len(q))) & q->tab_mask; + *pidx = (q->head + get_random_u32_below(choke_len(q))) & q->tab_mask; skb = q->tab[*pidx]; if (skb) return skb; diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index fb00ac40ecb7..6ef3021e1169 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -513,8 +513,8 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch, goto finish_segs; }

- skb->data[prandom_u32_max(skb_headlen(skb))] ^= - 1<<prandom_u32_max(8); + skb->data[get_random_u32_below(skb_headlen(skb))] ^= + 1<<get_random_u32_below(8); }

if (unlikely(sch->q.qlen >= sch->limit)) { diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 83628c347744..cfe72085fdc4 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -8319,7 +8319,7 @@ static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)

inet_get_local_port_range(net, &low, &high); remaining = (high - low) + 1; - rover = prandom_u32_max(remaining) + low; + rover = get_random_u32_below(remaining) + low;

do { rover++; diff --git a/net/sctp/transport.c b/net/sctp/transport.c index f8fd98784977..ca1eba95c293 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -199,7 +199,7 @@ void sctp_transport_reset_hb_timer(struct sctp_transport *transport) if ((time_before(transport->hb_timer.expires, expires) || !timer_pending(&transport->hb_timer)) && !mod_timer(&transport->hb_timer, - expires + prandom_u32_max(transport->rto))) + expires + get_random_u32_below(transport->rto))) sctp_transport_hold(transport); }

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index f075a9fb5ccc..95ff74706104 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -677,7 +677,7 @@ static void cache_limit_defers(void)

/* Consider removing either the first or the last */ if (cache_defer_cnt > DFR_MAX) { - if (prandom_u32_max(2)) + if (get_random_u32_below(2)) discard = list_entry(cache_defer_list.next, struct cache_deferred_req, recent); else diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 915b9902f673..2e4987dcba29 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1619,7 +1619,7 @@ static int xs_get_random_port(void) if (max < min) return -EADDRINUSE; range = max - min + 1; - rand = prandom_u32_max(range); + rand = get_random_u32_below(range); return rand + min; }

diff --git a/net/tipc/socket.c b/net/tipc/socket.c index e902b01ea3cb..b35c8701876a 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -3010,7 +3010,7 @@ static int tipc_sk_insert(struct tipc_sock *tsk) struct net *net = sock_net(sk); struct tipc_net *tn = net_generic(net, tipc_net_id); u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; - u32 portid = prandom_u32_max(remaining) + TIPC_MIN_PORT; + u32 portid = get_random_u32_below(remaining) + TIPC_MIN_PORT;

while (remaining--) { portid++; diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 884eca7f6743..ff38c5a4d174 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -627,7 +627,7 @@ static int __vsock_bind_connectible(struct vsock_sock *vsk,

if (!port) port = LAST_RESERVED_PORT + 1 + - prandom_u32_max(U32_MAX - LAST_RESERVED_PORT); + get_random_u32_below(U32_MAX - LAST_RESERVED_PORT);

vsock_addr_init(&new_addr, addr->svm_cid, addr->svm_port);

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 3d2fe7712ac5..40f831854774 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -2072,7 +2072,7 @@ int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) } else { u32 spi = 0; for (h = 0; h < high-low+1; h++) { - spi = low + prandom_u32_max(high - low + 1); + spi = low + get_random_u32_below(high - low + 1); x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); if (x0 == NULL) { newspi = htonl(spi);