syzbot


WARNING in get_signal

Status: upstream: reported C repro on 2019/06/13 12:31
Reported-by: syzbot+eb89c8004eabb60d0d7c@syzkaller.appspotmail.com
First crash: 1718d, last: 1258d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-44 WARNING in get_signal syz 15 1844d 2217d 0/2 closed as invalid on 2019/03/28 00:23
linux-4.14 WARNING in get_signal C error 3 1232d 1709d 0/1 upstream: reported C repro on 2019/06/23 01:46
android-44 WARNING in get_signal (2) 5 1559d 1739d 0/2 auto-closed as invalid on 2020/03/18 06:40
upstream WARNING in get_signal kernel C done 2 1239d 1241d 15/26 fixed on 2020/11/16 12:12
Fix bisection attempts (11)
Created Duration User Patch Repo Result
2020/10/15 14:00 4m bisect fix linux-4.19.y error job log (0)
2020/09/15 13:27 23m bisect fix linux-4.19.y job log (0) log
2020/08/16 12:39 27m bisect fix linux-4.19.y job log (0) log
2020/07/17 12:13 26m bisect fix linux-4.19.y job log (0) log
2020/06/17 11:48 25m bisect fix linux-4.19.y job log (0) log
2020/05/18 10:42 27m bisect fix linux-4.19.y job log (0) log
2020/04/18 10:16 25m bisect fix linux-4.19.y job log (0) log
2020/03/19 09:47 29m bisect fix linux-4.19.y job log (0) log
2020/02/13 23:27 24m bisect fix linux-4.19.y job log (0) log
2020/01/14 19:05 24m bisect fix linux-4.19.y job log (0) log
2019/12/15 18:40 24m bisect fix linux-4.19.y job log (0) log

Sample crash report:
audit: type=1400 audit(1582019041.644:36): avc:  denied  { map } for  pid=8032 comm="syz-executor355" path="/root/syz-executor355131934" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
WARNING: CPU: 1 PID: 8047 at kernel/signal.c:2329 do_jobctl_trap kernel/signal.c:2329 [inline]
WARNING: CPU: 1 PID: 8047 at kernel/signal.c:2329 get_signal+0x1bf9/0x1fc0 kernel/signal.c:2462
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8047 Comm: syz-executor355 Not tainted 4.19.104-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x53 kernel/panic.c:541
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:do_jobctl_trap kernel/signal.c:2329 [inline]
RIP: 0010:get_signal+0x1bf9/0x1fc0 kernel/signal.c:2462
Code: 84 db 0f 84 d5 e5 ff ff e8 24 5d 28 00 31 ff e8 cd d2 17 00 e9 c4 e5 ff ff e8 13 5d 28 00 0f 0b e9 dd fa ff ff e8 07 5d 28 00 <0f> 0b 41 bd 00 80 00 00 e9 7e f4 ff ff e8 85 fa 5f 00 e9 5e e9 ff
RSP: 0018:ffff8880965cfc30 EFLAGS: 00010093
RAX: ffff8880943a2280 RBX: 0000000100000000 RCX: ffffffff81427434
RDX: 0000000000000000 RSI: ffffffff81427fb9 RDI: 0000000000000005
RBP: ffff8880965cfce8 R08: ffff8880943a2280 R09: ffffed10136b715a
R10: ffffed10136b7159 R11: ffff88809b5b8acb R12: 0000000000000000
R13: 0000000000008000 R14: dffffc0000000000 R15: ffff8880943a2280
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath+0x40a/0x4c0 arch/x86/entry/common.c:271
 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:407
RIP: 0033:0x446749
Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fae630dfdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 00000000006dbc28 RCX: 0000000000446749
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 000000000a01ffff
RBP: 00000000006dbc20 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007fff74b7165f R14: 00007fae630e09c0 R15: 20c49ba5e353f7cf
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/02/18 09:46 linux-4.19.y 9b15f7fae677 1ce142dc .config console log report syz C ci2-linux-4-19
2019/06/13 11:30 linux-4.19.y 768292d05361 3f4e812b .config console log report syz ci2-linux-4-19
* Struck through repros no longer work on HEAD.