syzbot


WARNING in task_participate_group_stop

Status: upstream: reported C repro on 2019/12/02 13:46
Reported-by: syzbot+51c9c4fb88f389de5869@syzkaller.appspotmail.com
First crash: 1157d, last: 136d

Fix bisection: failed (bisect log)
similar bugs (8):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in task_participate_group_stop C inconclusive 8 134d 1157d 0/1 upstream: reported C repro on 2019/12/02 14:36
upstream WARNING in task_participate_group_stop (2) C inconclusive unreliable 20 36d 1739d 0/24 upstream: reported C repro on 2018/04/29 17:00
android-414 WARNING in task_participate_group_stop C 2 1428d 1391d 0/1 public: reported C repro on 2019/04/12 00:01
android-44 WARNING in task_participate_group_stop (2) C 4 1428d 1390d 0/2 public: reported C repro on 2019/04/13 00:00
android-49 WARNING in task_participate_group_stop C 15 1848d 2005d 2/3 fixed on 2018/02/06 12:55
upstream WARNING in task_participate_group_stop C 29 1905d 1920d 4/24 fixed on 2018/02/02 04:39
android-44 WARNING in task_participate_group_stop C 10 1857d 1864d 2/2 fixed on 2018/02/06 10:09
android-49 WARNING in task_participate_group_stop (2) C 11 1157d 1389d 0/3 public: reported C repro on 2019/04/14 00:00

Sample crash report:
hrtimer: interrupt took 53128 ns
WARNING: CPU: 1 PID: 8103 at kernel/signal.c:372 task_participate_group_stop+0x29e/0x300 kernel/signal.c:372
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8103 Comm: 3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:task_participate_group_stop+0x29e/0x300 kernel/signal.c:372
Code: 00 f0 83 44 24 fc 00 be 15 00 00 00 4c 89 ef e8 a8 25 0e 00 e9 4c fe ff ff e8 4e a0 27 00 0f 0b e9 f2 fd ff ff e8 42 a0 27 00 <0f> 0b e9 a3 fe ff ff 48 89 ef e8 93 7c 5d 00 e9 6d fe ff ff 48 89
RSP: 0018:ffff88809563fbd0 EFLAGS: 00010093
RAX: ffff8880b15d60c0 RBX: 0000000000000000 RCX: ffffffff813ae3c0
RDX: 0000000000000000 RSI: ffffffff813ae52e RDI: 0000000000000005
RBP: ffff8880abce0d20 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880abce0c80
R13: ffff8880b15d6540 R14: 0000000000040000 R15: 0000000000000000
 do_signal_stop+0x1f1/0x860 kernel/signal.c:2277
 get_signal+0xf17/0x1f70 kernel/signal.c:2464
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ff6e75dc120
Code: Bad RIP value.
RSP: 002b:00007fff2fddd360 EFLAGS: 00000200 ORIG_RAX: 000000000000003b
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (11):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-linux-4-19 2022/09/18 17:29 linux-4.19.y 3f8a27f9e27b dd9a85ff .config console log report syz C [disk image] [vmlinux] WARNING in task_participate_group_stop
ci2-linux-4-19 2021/01/23 16:24 linux-4.19.y 43d555d83c3f 52e37319 .config console log report syz C WARNING in task_participate_group_stop
ci2-linux-4-19 2020/03/29 06:12 linux-4.19.y 54b4fa6d3955 05736b29 .config console log report syz C
ci2-linux-4-19 2021/06/21 01:11 linux-4.19.y eb575cd5d7f6 aba2b2fb .config console log report syz WARNING in task_participate_group_stop
ci2-linux-4-19 2021/06/07 04:33 linux-4.19.y 1722257b8ece 500c2339 .config console log report syz WARNING in task_participate_group_stop
ci2-linux-4-19 2021/06/01 23:33 linux-4.19.y 6b7b0056defc 032639db .config console log report syz WARNING in task_participate_group_stop
ci2-linux-4-19 2021/05/06 13:11 linux-4.19.y 97a8651cadce 06c27ff5 .config console log report syz WARNING in task_participate_group_stop
ci2-linux-4-19 2019/12/02 12:45 linux-4.19.y 174651bdf802 f879db37 .config console log report syz
ci2-linux-4-19 2022/09/18 17:08 linux-4.19.y 3f8a27f9e27b dd9a85ff .config console log report info [disk image] [vmlinux] WARNING in task_participate_group_stop
ci2-linux-4-19 2021/05/11 14:44 linux-4.19.y 3c8c23092588 ca873091 .config console log report info WARNING in task_participate_group_stop
ci2-linux-4-19 2021/04/20 16:26 linux-4.19.y 2965db2e004c c0ced557 .config console log report info WARNING in task_participate_group_stop
* Struck through repros no longer work on HEAD.