On Tue, Oct 06, 2020 at 01:08:23AM -0700, syzbot wrote:
Hello,
syzbot found the following issue on:
HEAD commit: 549738f1 Linux 5.9-rc8 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b97ba3900000 kernel config: https://syzkaller.appspot.com/x/.config?x=c06bcf3cc963d91c dashboard link: https://syzkaller.appspot.com/bug?extid=45d7c243c006f39dc55a compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12bae9c0500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1099b1c0500000
The issue was bisected to:
commit 643c332d519bdfbf80d21f40d1c0aa0ccf3ec1cb Author: Zi Shen Lim zlim.lnx@gmail.com Date: Thu Jun 9 04:18:50 2016 +0000
arm64: bpf: optimize LD_ABS, LD_INDbisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11d44477900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13d44477900000 console output: https://syzkaller.appspot.com/x/log.txt?x=15d44477900000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+45d7c243c006f39dc55a@syzkaller.appspotmail.com Fixes: 643c332d519b ("arm64: bpf: optimize LD_ABS, LD_IND")
------------[ cut here ]------------ WARNING: CPU: 0 PID: 6879 at net/mac80211/ieee80211_i.h:1447 ieee80211_get_sband net/mac80211/ieee80211_i.h:1447 [inline] WARNING: CPU: 0 PID: 6879 at net/mac80211/ieee80211_i.h:1447 sta_info_alloc+0x1900/0x1f90 net/mac80211/sta_info.c:469 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6879 Comm: syz-executor071 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:ieee80211_get_sband net/mac80211/ieee80211_i.h:1447 [inline]
The patch fingered by the bisection only affects arm64, but this is an x86 box. So this is clearly bogus.
Will