syzbot


WARNING in perf_pending_task

Status: upstream: reported C repro on 2025/06/27 13:50
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+4281a7c76d4ee0c96c3c@syzkaller.appspotmail.com
First crash: 145d, last: 6h50m
Bug presence (3)
Date Name Commit Repro Result
2025/08/18 linux-6.1.y (ToT) 0bc96de781b4 C [report] WARNING in perf_pending_task
2025/07/02 upstream (ToT) 66701750d556 C [report] WARNING in perf_pending_task
2025/08/18 upstream (ToT) c17b750b3ad9 C Didn't crash
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 missing-backport -1 C 59 19h00m 140d 0/2 upstream: reported C repro on 2025/07/03 08:45
linux-5.15 WARNING in perf_pending_task origin:upstream -1 C 348 19h06m 143d 0/3 upstream: reported C repro on 2025/06/29 10:30
upstream WARNING in perf_pending_task perf -1 C 35773 124d 148d 29/29 fixed on 2025/09/04 16:57
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/09/02 06:16 4h07m fix candidate upstream OK (0) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4843 at kernel/events/core.c:6592 perf_sigtrap kernel/events/core.c:6592 [inline]
WARNING: CPU: 0 PID: 4843 at kernel/events/core.c:6592 perf_pending_task+0x358/0x470 kernel/events/core.c:6704
Modules linked in:
CPU: 0 PID: 4843 Comm: syz.0.165 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:perf_sigtrap kernel/events/core.c:6592 [inline]
RIP: 0010:perf_pending_task+0x358/0x470 kernel/events/core.c:6704
Code: ff 84 db 75 14 e8 b8 d1 da ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a4 d1 da ff e8 f7 7b 5a ff eb e5 e8 98 d1 da ff <0f> 0b e9 f3 fe ff ff e8 8c d1 da ff 48 c7 c7 d0 03 bc 8c 4c 89 f6
RSP: 0018:ffffc90004f47c60 EFLAGS: 00010293
RAX: ffffffff81a604c8 RBX: ffff88805f135258 RCX: ffff8880747f3b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100e8fe8b1
R10: ffffed100e8fe8b1 R11: 1ffff1100e8fe8b0 R12: ffff8880747f3b80
R13: ffff8880740cb160 R14: ffff88805f135020 R15: 1ffff1100be26a04
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555578efb808 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37e398f6c9
Code: Unable to access opcode bytes at 0x7f37e398f69f.
RSP: 002b:00007ffe03c1c568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f37e398f6c9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe03c1c5cc R08: 0000000203c1c65f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000094
R13: 00000000000927c0 R14: 000000000001459f R15: 00007ffe03c1c620
 </TASK>

Crashes (531):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/14 16:17 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/10/30 14:34 linux-6.1.y f6e38ae624cf fd2207e7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/09/10 14:32 linux-6.1.y f97f1002271b fdeaa69b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/09/09 16:24 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/09/09 15:23 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/09/09 14:09 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/09/07 14:43 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/29 08:11 linux-6.1.y f89b6e15694c d401b9d7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/27 12:35 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/27 11:26 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/09 00:15 linux-6.1.y 3594f306da12 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/03 22:41 linux-6.1.y 3594f306da12 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/13 08:08 linux-6.1.y dfc486ec9cce 3cda49cf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/06/29 21:31 linux-6.1.y 7e69c33e4858 fc9d8ee5 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/05 02:49 linux-6.1.y 3594f306da12 f5bcc8dc .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/20 01:22 linux-6.1.y f6e38ae624cf 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 16:22 linux-6.1.y f6e38ae624cf 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 13:48 linux-6.1.y f6e38ae624cf 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 12:23 linux-6.1.y f6e38ae624cf 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 09:27 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 06:46 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 06:14 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/19 03:00 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/18 23:46 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/18 22:01 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/18 17:58 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/18 12:12 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/18 07:42 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/17 23:24 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/17 10:56 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/17 06:05 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 23:51 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 18:31 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 16:15 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 15:11 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 12:53 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 09:41 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 07:39 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 05:49 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/16 00:33 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/15 20:46 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/15 18:51 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/15 13:47 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/15 11:38 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 23:20 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 19:28 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 17:52 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 10:10 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 07:27 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 03:10 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/14 01:15 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/13 22:37 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/13 07:45 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/13 04:48 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/13 02:19 linux-6.1.y f6e38ae624cf 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/12 00:29 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/11 22:59 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/11 16:14 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/11 13:48 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/11 11:39 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/11 05:36 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/11/10 15:13 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/06/27 13:49 linux-6.1.y 7e69c33e4858 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
* Struck through repros no longer work on HEAD.