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: 64d, last: 1d10h
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 -1 C 20 1d10h 58d 0/2 upstream: reported C repro on 2025/07/03 08:45
linux-5.15 WARNING in perf_pending_task origin:upstream -1 C 113 1h56m 62d 0/3 upstream: reported C repro on 2025/06/29 10:30
upstream WARNING in perf_pending_task perf -1 C 35773 42d 67d 28/29 upstream: reported C repro on 2025/06/24 19:01

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4567 at kernel/events/core.c:6592 perf_sigtrap kernel/events/core.c:6592 [inline]
WARNING: CPU: 1 PID: 4567 at kernel/events/core.c:6592 perf_pending_task+0x358/0x470 kernel/events/core.c:6704
Modules linked in:
CPU: 1 PID: 4567 Comm: syz.0.82 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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 e8 d5 da ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 d4 d5 da ff e8 67 86 5a ff eb e5 e8 c8 d5 da ff <0f> 0b e9 f3 fe ff ff e8 bc d5 da ff 48 c7 c7 70 ff bb 8c 4c 89 f6
RSP: 0018:ffffc900039bfc60 EFLAGS: 00010293
RAX: ffffffff81a5fa58 RBX: ffff88807a5d5e58 RCX: ffff888018f49dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed10031e94f9
R10: ffffed10031e94f9 R11: 1ffff110031e94f8 R12: ffff888018f49dc0
R13: ffff88802967b560 R14: ffff88807a5d5c20 R15: 1ffff1100f4bab84
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f023b7dac CR3: 000000000c88e000 CR4: 00000000003506e0
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: 0033:0x7f8f0218ebe9
Code: Unable to access opcode bytes at 0x7f8f0218ebbf.
RSP: 002b:00007ffc77b5de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8f0218ebe9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc77b5decc R08: 0000000277b5df5f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000041
R13: 00000000000927c0 R14: 0000000000011e43 R15: 00007ffc77b5df20
 </TASK>

Crashes (88):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/08/29 11:29 linux-6.1.y f89b6e15694c 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/28 21:59 linux-6.1.y f89b6e15694c d401b9d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/28 02:04 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/26 18:08 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/25 17:06 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/25 12:28 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/24 09:38 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/23 22:53 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/22 18:05 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/20 11:18 linux-6.1.y 0bc96de781b4 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/20 01:11 linux-6.1.y 0bc96de781b4 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/19 04:35 linux-6.1.y 0bc96de781b4 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/19 02:29 linux-6.1.y 0bc96de781b4 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/17 19:02 linux-6.1.y 0bc96de781b4 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/15 05:05 linux-6.1.y 3594f306da12 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/13 22:51 linux-6.1.y 3594f306da12 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/11 09:30 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/10 00:42 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/08 12:29 linux-6.1.y 3594f306da12 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/08 03:32 linux-6.1.y 3594f306da12 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/07 10:37 linux-6.1.y 3594f306da12 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/05 08:44 linux-6.1.y 3594f306da12 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/05 05:57 linux-6.1.y 3594f306da12 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/08/01 15:03 linux-6.1.y 3594f306da12 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/31 16:11 linux-6.1.y 3594f306da12 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/31 02:55 linux-6.1.y 3594f306da12 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/28 09:05 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/27 19:34 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/27 03:06 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/26 01:50 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/25 06:15 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/24 22:44 linux-6.1.y 3594f306da12 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/24 22:44 linux-6.1.y 3594f306da12 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/24 12:23 linux-6.1.y 3594f306da12 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/23 19:01 linux-6.1.y 3369c6df2fae e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/23 08:32 linux-6.1.y 3369c6df2fae e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/21 05:59 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/21 00:36 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/20 12:04 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/20 09:42 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/19 01:00 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/18 18:44 linux-6.1.y 3369c6df2fae 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/18 18:32 linux-6.1.y 3369c6df2fae 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/01 11:06 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/01 11:01 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/01 11:00 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/01 10:58 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/07/01 10:57 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in perf_pending_task
2025/06/29 20:32 linux-6.1.y 7e69c33e4858 fc9d8ee5 .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.