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WARNING in posix_cpu_timer_del (3)

Status: closed as invalid on 2019/10/04 07:44
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+dabf3198a30ed5a2158f@syzkaller.appspotmail.com
First crash: 1697d, last: 1683d
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
WARNING in posix_cpu_timer_del (3) 2 (3) 2019/09/06 06:14
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in posix_cpu_timer_del (2) kernel C done 76 1697d 1699d 0/26 closed as invalid on 2019/09/02 05:17
upstream WARNING in posix_cpu_timer_del kernel C done 241 1699d 1702d 0/26 closed as invalid on 2019/08/31 03:15

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9863 at kernel/time/posix-cpu-timers.c:401 posix_cpu_timer_del+0x2f0/0x3b0 kernel/time/posix-cpu-timers.c:401
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9863 Comm: syz-executor971 Not tainted 5.3.0-rc6-next-20190830 #75
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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2dc/0x755 kernel/panic.c:220
 __warn.cold+0x2f/0x3c kernel/panic.c:581
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:posix_cpu_timer_del+0x2f0/0x3b0 kernel/time/posix-cpu-timers.c:401
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 83 bb c8 00 00 00 00 74 16 e8 00 58 0d 00 <0f> 0b e9 87 fe ff ff e8 c4 38 48 00 e9 dd fd ff ff e8 ea 57 0d 00
RSP: 0018:ffff88808771fa30 EFLAGS: 00010093
RAX: ffff888095cec480 RBX: ffff8880a11b0a10 RCX: 1ffff11012b9d9a2
RDX: 0000000000000000 RSI: ffffffff8164fe10 RDI: ffff8880a11b0ad8
RBP: ffff88808771fac0 R08: 0000000000000002 R09: ffff888095cecd18
R10: fffffbfff138aef8 R11: ffffffff89c577c7 R12: ffff88809abec4c0
R13: 1ffff11010ee3f47 R14: ffff88808771fa98 R15: ffff8880a11b0a68
 timer_delete_hook kernel/time/posix-timers.c:978 [inline]
 itimer_delete kernel/time/posix-timers.c:1021 [inline]
 exit_itimers+0xdb/0x2e0 kernel/time/posix-timers.c:1041
 do_exit+0x1980/0x2e60 kernel/exit.c:853
 do_group_exit+0x135/0x360 kernel/exit.c:983
 get_signal+0x47c/0x2500 kernel/signal.c:2734
 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:159
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446679
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:00007ffff1ee67e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000012e22 RCX: 0000000000446679
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc2c
RBP: 00000000006dbc2c R08: 000000037ffffa00 R09: 000000037ffffa00
R10: 00007ffff1ee6800 R11: 0000000000000246 R12: 00000000006dbc20
R13: 0000000000000000 R14: 000000000000002d R15: 20c49ba5e353f7cf
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (40):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/02 22:10 linux-next 6d028043b55e 14544a56 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/02 06:07 linux-next 6d028043b55e db7c31ca .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/16 04:37 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/16 03:40 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/16 02:48 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/15 06:35 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/15 01:24 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/14 22:51 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/14 18:07 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/14 16:49 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/14 03:25 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/14 01:47 linux-next 6d028043b55e 32d59357 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/12 16:55 linux-next 6d028043b55e 0b7672ee .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/12 02:48 linux-next 6d028043b55e f4e53c10 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/12 02:42 linux-next 6d028043b55e f4e53c10 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/12 01:13 linux-next 6d028043b55e f4e53c10 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/11 20:06 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/10 23:32 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/10 14:06 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/10 10:29 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/09 20:44 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/09 07:43 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/09 07:00 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/09 05:58 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/08 05:24 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/07 18:19 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/07 10:04 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/07 09:24 linux-next 6d028043b55e a60cb4cd .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/06 12:15 linux-next 6d028043b55e 040fda58 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/06 03:56 linux-next 6d028043b55e 040fda58 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/06 03:54 linux-next 6d028043b55e 040fda58 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/04 13:14 linux-next 6d028043b55e 12381952 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/04 08:22 linux-next 6d028043b55e 12381952 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/04 07:32 linux-next 6d028043b55e 12381952 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/03 19:02 linux-next 6d028043b55e 48448e71 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/03 19:01 linux-next 6d028043b55e 48448e71 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/02 17:49 linux-next 6d028043b55e 14544a56 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/02 13:23 linux-next 6d028043b55e db7c31ca .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/02 11:15 linux-next 6d028043b55e db7c31ca .config console log report ci-upstream-linux-next-kasan-gce-root
2019/09/02 05:23 linux-next 6d028043b55e db7c31ca .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.