syzbot


WARNING in perf_pending_task

Status: upstream: reported C repro on 2025/06/29 10:30
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+5033aaab8eff7ec95477@syzkaller.appspotmail.com
First crash: 62d, last: 2h31m
Bug presence (1)
Date Name Commit Repro Result
2025/07/06 upstream (ToT) 1f988d0788f5 C [report] WARNING in perf_pending_task
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING in perf_pending_task origin:upstream -1 C 20 1d02h 58d 0/2 upstream: reported C repro on 2025/07/03 08:45
linux-6.1 WARNING in perf_pending_task origin:upstream missing-backport -1 C 88 1d02h 64d 0/3 upstream: reported C repro on 2025/06/27 13:50
upstream WARNING in perf_pending_task perf -1 C 35773 42d 66d 28/29 upstream: reported C repro on 2025/06/24 19:01

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4704 at kernel/events/core.c:6674 perf_sigtrap kernel/events/core.c:6674 [inline]
WARNING: CPU: 0 PID: 4704 at kernel/events/core.c:6674 perf_pending_task+0x358/0x470 kernel/events/core.c:6786
Modules linked in:
CPU: 0 PID: 4704 Comm: syz.0.194 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:perf_sigtrap kernel/events/core.c:6674 [inline]
RIP: 0010:perf_pending_task+0x358/0x470 kernel/events/core.c:6786
Code: ff 84 db 75 14 e8 c8 a0 de ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b4 a0 de ff e8 27 57 67 ff eb e5 e8 a8 a0 de ff <0f> 0b e9 f3 fe ff ff e8 9c a0 de ff 48 c7 c7 e0 1a 1a 8c 4c 89 f6
RSP: 0018:ffffc90003f6fd18 EFLAGS: 00010293
RAX: ffffffff81992378 RBX: ffff88813fe363d0 RCX: ffff88801bb4bb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed10037698b3
R10: ffffed10037698b3 R11: 1ffff110037698b2 R12: ffff88801bb4bb80
R13: ffff88807cdb2d58 R14: ffff88813fe361a0 R15: 1ffff11027fc6c34
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa61b6bcdac CR3: 000000000be8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x61e/0x20a0 kernel/exit.c:883
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 __do_sys_exit_group kernel/exit.c:1008 [inline]
 __se_sys_exit_group kernel/exit.c:1006 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1006
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa61b493be9
Code: Unable to access opcode bytes at RIP 0x7fa61b493bbf.
RSP: 002b:00007ffc46ff1968 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa61b493be9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc46ff19cc R08: 0000000246ff1a5f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000000b1
R13: 00000000000927c0 R14: 00000000000143bd R15: 00007ffc46ff1a20
 </TASK>

Crashes (111):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/24 07:53 linux-5.15.y c79648372d02 bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/19 20:12 linux-5.15.y c79648372d02 254a27c1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/19 19:27 linux-5.15.y c79648372d02 254a27c1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/07/23 18:15 linux-5.15.y c79648372d02 e1dd4f22 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/07/04 22:11 linux-5.15.y 3dea0e7f549e d869b261 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/30 11:21 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/29 22:18 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/29 21:00 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/29 11:28 linux-5.15.y 01879f56bdde 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/29 08:41 linux-5.15.y 01879f56bdde d401b9d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/27 05:03 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/26 23:16 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/25 21:19 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/25 19:12 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/24 21:32 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/24 16:24 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/23 19:28 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/23 15:29 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/22 00:46 linux-5.15.y c79648372d02 3e79b825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/21 10:55 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/21 07:33 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/21 05:27 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/21 02:13 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/20 23:47 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/19 07:23 linux-5.15.y c79648372d02 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/19 06:59 linux-5.15.y c79648372d02 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/18 17:37 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/18 16:32 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/18 06:11 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/18 02:25 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/18 00:56 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/17 23:37 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/17 21:45 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/17 03:13 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/16 20:03 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/16 17:19 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/16 11:08 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/16 05:55 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/15 19:26 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/15 15:20 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/15 06:20 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/15 05:35 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/14 07:45 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/14 05:26 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/14 01:10 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/13 20:14 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/13 15:40 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/13 13:55 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/13 11:03 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/13 01:07 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/12 09:23 linux-5.15.y c79648372d02 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/12 06:09 linux-5.15.y c79648372d02 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/11 04:34 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/08/10 09:40 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
2025/06/29 10:29 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in perf_pending_task
* Struck through repros no longer work on HEAD.