B.A.T.M.A.N

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Re: [PATCH 1/1] batman-adv: Broken sync while rescheduling delayed work
by patchwork-bot+netdevbpf＠kernel.org 08 Jun '23

08 Jun '23

Hello: This patch was applied to netdev/net.git (main) by Simon Wunderlich <sw(a)simonwunderlich.de>: On Wed, 7 Jun 2023 17:55:15 +0200 you wrote: > From: Vladislav Efanov <VEfanov(a)ispras.ru> > > Syzkaller got a lot of crashes like: > KASAN: use-after-free Write in *_timers* > > All of these crashes point to the same memory area: > > [...] Here is the summary with links: - [1/1] batman-adv: Broken sync while rescheduling delayed work https://git.kernel.org/netdev/net/c/abac3ac97fe8 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html

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[PATCH 0/1] pull request for net: batman-adv 2023-06-07
by Simon Wunderlich 07 Jun '23

07 Jun '23

Hi David, hi Jakub, here is a bugfix for batman-adv which we would like to have integrated into net. Please pull or let me know of any problem! Thank you, Simon The following changes since commit 44c026a73be8038f03dbdeef028b642880cf1511: Linux 6.4-rc3 (2023-05-21 14:05:48 -0700) are available in the Git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-net-pullrequest-20230607 for you to fetch changes up to abac3ac97fe8734b620e7322a116450d7f90aa43: batman-adv: Broken sync while rescheduling delayed work (2023-05-26 23:14:49 +0200) ---------------------------------------------------------------- Here is a batman-adv bugfix: - fix a broken sync while rescheduling delayed work, by Vladislav Efanov ---------------------------------------------------------------- Vladislav Efanov (1): batman-adv: Broken sync while rescheduling delayed work net/batman-adv/distributed-arp-table.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

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[syzbot] Monthly batman report (Jun 2023)
by syzbot 06 Jun '23

06 Jun '23

Hello batman maintainers/developers, This is a 31-day syzbot report for the batman subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/batman During the period, 0 new issues were detected and 0 were fixed. In total, 9 issues are still open and 20 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 5426 Yes WARNING: ODEBUG bug in netdev_run_todo https://syzkaller.appspot.com/bug?extid=f9484b345f41843fc9a9 <2> 1375 Yes WARNING: ODEBUG bug in netdev_freemem (2) https://syzkaller.appspot.com/bug?extid=c4521ac872a4ccc3afec <3> 128 Yes INFO: rcu detected stall in batadv_nc_worker (3) https://syzkaller.appspot.com/bug?extid=69904c3b4a09e8fa2e1b --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. To disable reminders for individual bugs, reply with the following command: #syz set <Ref> no-reminders To change bug's subsystems, reply with: #syz set <Ref> subsystems: new-subsystem You may send multiple commands in a single email message.

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[PATCH] batman-adv: Broken sync while rescheduling delayed work
by Vladislav Efanov 26 May '23

26 May '23

Syzkaller got a lot of crashes like: KASAN: use-after-free Write in *_timers* All of these crashes point to the same memory area: The buggy address belongs to the object at ffff88801f870000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5320 bytes inside of 8192-byte region [ffff88801f870000, ffff88801f872000) This area belongs to : batadv_priv->batadv_priv_dat->delayed_work->timer_list The reason for these issues is the lack of synchronization. Delayed work (batadv_dat_purge) schedules new timer/work while the device is being deleted. As the result new timer/delayed work is set after cancel_delayed_work_sync() was called. So after the device is freed the timer list contains pointer to already freed memory. Found by Linux Verification Center (linuxtesting.org) with syzkaller. Fixes: 2f1dfbe18507 ("batman-adv: Distributed ARP Table - implement local storage") Signed-off-by: Vladislav Efanov <VEfanov(a)ispras.ru> --- net/batman-adv/distributed-arp-table.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 6968e55eb971..28a939d56090 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -101,7 +101,6 @@ static void batadv_dat_purge(struct work_struct *work); */ static void batadv_dat_start_timer(struct batadv_priv *bat_priv) { - INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge); queue_delayed_work(batadv_event_workqueue, &bat_priv->dat.work, msecs_to_jiffies(10000)); } @@ -819,6 +818,7 @@ int batadv_dat_init(struct batadv_priv *bat_priv) if (!bat_priv->dat.hash) return -ENOMEM; + INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge); batadv_dat_start_timer(bat_priv); batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1, -- 2.34.1

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[syzbot] Monthly batman report (May 2023)
by syzbot 05 May '23

05 May '23

Hello batman maintainers/developers, This is a 31-day syzbot report for the batman subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/batman During the period, 0 new issues were detected and 0 were fixed. In total, 7 issues are still open and 20 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 5238 Yes WARNING: ODEBUG bug in netdev_run_todo https://syzkaller.appspot.com/bug?extid=f9484b345f41843fc9a9 <2> 1372 Yes WARNING: ODEBUG bug in netdev_freemem (2) https://syzkaller.appspot.com/bug?extid=c4521ac872a4ccc3afec <3> 121 Yes INFO: rcu detected stall in batadv_nc_worker (3) https://syzkaller.appspot.com/bug?extid=69904c3b4a09e8fa2e1b --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. To disable reminders for individual bugs, reply with the following command: #syz set <Ref> no-reminders To change bug's subsystems, reply with: #syz set <Ref> subsystems: new-subsystem You may send multiple commands in a single email message.

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[syzbot] Monthly batman report
by syzbot 04 Apr '23

04 Apr '23

Hello batman maintainers/developers, This is a 30-day syzbot report for the batman subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/batman During the period, 2 new issues were detected and 0 were fixed. In total, 8 issues are still open and 19 have been fixed so far. Some of the still happening issues: Crashes Repro Title 5034 Yes WARNING: ODEBUG bug in netdev_run_todo https://syzkaller.appspot.com/bug?extid=f9484b345f41843fc9a9 1367 Yes WARNING: ODEBUG bug in netdev_freemem (2) https://syzkaller.appspot.com/bug?extid=c4521ac872a4ccc3afec 115 Yes INFO: rcu detected stall in batadv_nc_worker (3) https://syzkaller.appspot.com/bug?extid=69904c3b4a09e8fa2e1b --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com.

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[syzbot] [batman?] WARNING: locking bug in batadv_nc_process_nc_paths
by syzbot 01 Apr '23

01 Apr '23

Hello, syzbot found the following issue on: HEAD commit: a6faf7ea9fcb Add linux-next specific files for 20230328 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12e4a6d1c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=dd9eb5678a80e926 dashboard link: https://syzkaller.appspot.com/bug?extid=6c3ddeb774a88806d35a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b03351a37b6b/disk-a6faf7ea.raw… vmlinux: https://storage.googleapis.com/syzbot-assets/663c2ddae5f7/vmlinux-a6faf7ea.… kernel image: https://storage.googleapis.com/syzbot-assets/a5e229b4773a/bzImage-a6faf7ea.… IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6c3ddeb774a88806d35a(a)syzkaller.appspotmail.com ============================= [ BUG: Invalid wait context ] 6.3.0-rc4-next-20230328-syzkaller #0 Not tainted ----------------------------- kworker/u4:11/7080 is trying to lock: ffffffff916756d0 (lock_keys_hash){....}-{40:209}, at: spin_lock_bh include/linux/spinlock.h:355 [inline] ffffffff916756d0 (lock_keys_hash){....}-{40:209}, at: batadv_nc_process_nc_paths.part.0+0x142/0x3f0 net/batman-adv/network-coding.c:690 other info that might help us debug this: context-{4:4} 3 locks held by kworker/u4:11/7080: #0: ffff888026eef938 ((wq_completion)bat_events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ((wq_completion)bat_events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ((wq_completion)bat_events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376 #1: ffffc900033afdb0 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380 #2: ffffffff8c795e00 (rcu_read_lock){....}-{1:2}, at: batadv_nc_process_nc_paths.part.0+0xb1/0x3f0 net/batman-adv/network-coding.c:684 stack backtrace: CPU: 1 PID: 7080 Comm: kworker/u4:11 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 Workqueue: bat_events batadv_nc_worker Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_lock_invalid_wait_context kernel/locking/lockdep.c:4724 [inline] check_wait_context kernel/locking/lockdep.c:4785 [inline] __lock_acquire+0x159e/0x5df0 kernel/locking/lockdep.c:5024 lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] batadv_nc_process_nc_paths.part.0+0x142/0x3f0 net/batman-adv/network-coding.c:690 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline] batadv_nc_worker+0xc82/0xfe0 net/batman-adv/network-coding.c:728 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> ================================================================== BUG: KASAN: slab-out-of-bounds in batadv_nc_fwd_flush+0x422/0x4d0 net/batman-adv/network-coding.c:650 Read of size 4 at addr ffff88807a916130 by task kworker/u4:11/7080 CPU: 1 PID: 7080 Comm: kworker/u4:11 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 Workqueue: bat_events batadv_nc_worker Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 batadv_nc_fwd_flush+0x422/0x4d0 net/batman-adv/network-coding.c:650 batadv_nc_process_nc_paths.part.0+0x1b6/0x3f0 net/batman-adv/network-coding.c:693 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline] batadv_nc_worker+0xc82/0xfe0 net/batman-adv/network-coding.c:728 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Allocated by task 12301: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] ref_tracker_alloc+0x158/0x580 lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:4059 [inline] netdev_hold include/linux/netdevice.h:4088 [inline] netdev_hold include/linux/netdevice.h:4083 [inline] fib_check_nh_nongw net/ipv4/fib_semantics.c:1238 [inline] fib_check_nh+0x270/0x640 net/ipv4/fib_semantics.c:1258 fib_create_info+0x23b0/0x4c00 net/ipv4/fib_semantics.c:1553 fib_table_insert+0x199/0x1be0 net/ipv4/fib_trie.c:1236 fib_magic+0x493/0x580 net/ipv4/fib_frontend.c:1104 fib_add_ifaddr+0x4bc/0x560 net/ipv4/fib_frontend.c:1148 fib_netdev_event+0x38c/0x6f0 net/ipv4/fib_frontend.c:1486 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] __dev_notify_flags+0x120/0x2d0 net/core/dev.c:8566 dev_change_flags+0x11b/0x170 net/core/dev.c:8604 do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836 rtnl_group_changelink net/core/rtnetlink.c:3380 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3636 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3673 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6388 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2572 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807a916100 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 16 bytes to the right of allocated 32-byte region [ffff88807a916100, ffff88807a916120) The buggy address belongs to the physical page: page:ffffea0001ea4580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a916 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888012441500 ffffea0001dedf40 dead000000000002 raw: 0000000000000000 0000000000400040 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5781, tgid 5781 (syz-executor.4), ts 327417606587, free_ts 297066583858 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:680 [inline] tomoyo_encode2.part.0+0xe9/0x3a0 security/tomoyo/realpath.c:45 tomoyo_encode2 security/tomoyo/realpath.c:31 [inline] tomoyo_encode+0x2c/0x50 security/tomoyo/realpath.c:80 tomoyo_path_perm+0x394/0x430 security/tomoyo/file.c:831 tomoyo_path_symlink+0x98/0xe0 security/tomoyo/tomoyo.c:211 security_path_symlink+0xe3/0x160 security/security.c:1747 do_symlinkat+0x10a/0x2e0 fs/namei.c:4422 __do_sys_symlinkat fs/namei.c:4440 [inline] __se_sys_symlinkat fs/namei.c:4437 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4437 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x29a/0x3a0 security/tomoyo/file.c:771 tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline] tomoyo_file_open+0xa1/0xc0 security/tomoyo/tomoyo.c:327 security_file_open+0x49/0xb0 security/security.c:2797 do_dentry_open+0x575/0x13f0 fs/open.c:907 do_open fs/namei.c:3560 [inline] path_openat+0x1baa/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1383 Memory state around the buggy address: ffff88807a916000: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff88807a916080: 00 00 00 00 fc fc fc fc 00 00 05 fc fc fc fc fc >ffff88807a916100: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff88807a916180: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff88807a916200: 00 00 00 00 fc fc fc fc 00 00 04 fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

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[PATCH 0/5] pull request for net-next: batman-adv 2023-01-27
by Simon Wunderlich 07 Feb '23

07 Feb '23

Hi Jakub, hi David, here is a feature/cleanup pull request of batman-adv to go into net-next. Please pull or let me know of any problem! Thank you, Simon The following changes since commit 88603b6dc419445847923fcb7fe5080067a30f98: Linux 6.2-rc2 (2023-01-01 13:53:16 -0800) are available in the Git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-next-pullrequest-20230127 for you to fetch changes up to 0c4061c0d0e2c381ffe4d8b7c62ea69ad8132071: batman-adv: tvlv: prepare for tvlv enabled multicast packet type (2023-01-21 19:01:59 +0100) ---------------------------------------------------------------- This feature/cleanup patchset includes the following patches: - bump version strings, by Simon Wunderlich - drop prandom.h includes, by Sven Eckelmann - fix mailing list address, by Sven Eckelmann - multicast feature preparation, by Linus Lüssing (2 patches) ---------------------------------------------------------------- Linus Lüssing (2): batman-adv: mcast: remove now redundant single ucast forwarding batman-adv: tvlv: prepare for tvlv enabled multicast packet type Simon Wunderlich (1): batman-adv: Start new development cycle Sven Eckelmann (2): batman-adv: Drop prandom.h includes batman-adv: Fix mailing list address Documentation/networking/batman-adv.rst | 2 +- include/uapi/linux/batadv_packet.h | 2 + net/batman-adv/bat_iv_ogm.c | 1 - net/batman-adv/bat_v_elp.c | 1 - net/batman-adv/bat_v_ogm.c | 5 +- net/batman-adv/distributed-arp-table.c | 2 +- net/batman-adv/gateway_common.c | 2 +- net/batman-adv/main.h | 2 +- net/batman-adv/multicast.c | 251 ++------------------------------ net/batman-adv/multicast.h | 38 +---- net/batman-adv/network-coding.c | 4 +- net/batman-adv/routing.c | 7 +- net/batman-adv/soft-interface.c | 26 ++-- net/batman-adv/translation-table.c | 4 +- net/batman-adv/tvlv.c | 71 ++++++--- net/batman-adv/tvlv.h | 9 +- net/batman-adv/types.h | 6 + 17 files changed, 110 insertions(+), 323 deletions(-)

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[PATCH v4 0/5] Implementation of a Stateless Multicast Packet Type
by Linus Lüssing 27 Jan '23

27 Jan '23

Hi, The following patchset implements a stateless, TVLV capable batman-adv multicast packet type. The new batman-adv multicast packet type allows to contain several originator destination MAC addresses within a TVLV. Routers on the way will potentially split the batman-adv multicast packet and adjust its tracker TVLV contents. Routing decisions are still based on the selected BATMAN IV or BATMAN V routing algorithm. So this new batman-adv multicast packet type retains the same loop-free properties. The purpose of this new packet type is to allow to forward an IP multicast packet with less transmissions / overhead than the multicast-via-multiple-unicasts approach. Or to reach a lot more destinations (currently up to 196, depending on the payload size, see Wiki documentation for details) than with the default multicast fanout for the via-unicasts approach. This will allow using applications like mDNS again in several Freifunk communities. And with less transmissions will also make more bulky multicast applications, like media streaming (to an assessable amount of receivers) a lot more feasible. This approach is way simpler than the original multicast (tracker) packet approach we envisioned years ago. As it involves no maintenance of an extra, state based multicast routing table. However the TVLV capability should allow to extend things later, to split control and data plane a bit more for instance, to further increase the number of destinations, to further reduce overhead. A compact overview can be found in the Wiki here, including limitations: https://www.open-mesh.org/projects/batman-adv/wiki/Multicast-Packet-Type Regards, Linus ___ Changelog v4: * PATCH 4/5: * add missing include for linux/types.h in multicast.h * add missing kerneldoc for @bat_priv in batadv_mcast_forw_push_dest() and batadv_mcast_forw_push_tvlvs() * use sizeof_field(type, field) instead of sizeof(((type *)0)->field) in batadv_mcast_forw_push_dest() * PATCH 5/5: * rename num_dests_remove to num_dests_reduce in batadv_mcast_forw_shrink_align_offse() to fix kerneldocs and for consistency * fix typo in kerneldoc in batadv_mcast_forw_shrink_update_headers() -> @num_dest_reduce -> @num_dests_reduce * use sizeof_field(type, field) instead of sizeof(((type *)0)->field) in batadv_mcast_forw_shrink_align_offset() Changelog v3: * PATCH 1/5: * remove now obsolete includes * PATCH 2/5: * fix batadv_tvlv_handler_register() in network-coding.c * add missing include for linux/skbuff.h * move variable declarations out of the switch case in batadv_tvlv_call_handler() * PATCH 3/5: * remove unnecessary include of multicast.h in routing.c * add a few missing includes to multicast_forw.c (linux/byteorder/generic.h, linux/errno.h, linux/gfp.h, linux/stddef.h uapi/linux/batadv_packet.h, multicast.h) * PATCH 4/5: * add missing rcu_read_unlock() in error case before returning in batadv_mcast_forw_push_dests_list() * remove unnecessary include of soft-interface.h in multicast_forw.c * add a few missing includes to multicast_forw.c (linux/bug.h, linux/build_bug.h, linux/limits.h, linux/rculist.h, linux/rcupdate.h, linux/string.h) * make batadv_mcast_forw_mode_by_count() static * fix return types in the declaration of batadv_mcast_forw_packet_hdrlen() and batadv_mcast_forw_push() in multicast.h * fix typo in commit message: "that the are capable of" -> "that the*y* are capable of" * PATCH 5/5: * make batadv_mcast_forw_shrink_pack_dests() adhere to 80 characters per line for consistency * add a "continue" statement after the jump label in batadv_mcast_forw_shrink_pack_dests() to silence the sparse error "error: label at end of compound statement" Changelog v2: * Add "[PATCH v2 0/5]" prefix to title of cover letter, so that Patchwork can hopefully find it - no other changes

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[PATCH] batman-adv: Fix mailing list address
by Sven Eckelmann 21 Jan '23

21 Jan '23

Fixes: d83571147325 ("add some README to describe the usage") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- Documentation/networking/batman-adv.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/networking/batman-adv.rst b/Documentation/networking/batman-adv.rst index b85563ea..8a0dcb18 100644 --- a/Documentation/networking/batman-adv.rst +++ b/Documentation/networking/batman-adv.rst @@ -159,7 +159,7 @@ Please send us comments, experiences, questions, anything :) IRC: #batadv on ircs://irc.hackint.org/ Mailing-list: - b.a.t.m.a.n(a)open-mesh.org (optional subscription at + b.a.t.m.a.n(a)lists.open-mesh.org (optional subscription at https://lists.open-mesh.org/mailman3/postorius/lists/b.a.t.m.a.n.lists.open…) You can also contact the Authors: --- base-commit: d364e8168b28b345f39c3f77526a2d71a28c282e change-id: 20230121-mailinglist-5f3588e088c6 Best regards, -- Sven Eckelmann <sven(a)narfation.org>

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