syzbot


WARNING in perf_pending_task

Status: upstream: reported C repro on 2025/06/24 19:01
Subsystems: perf
[Documentation on labels]
Reported-by: syzbot+2fe61cb2a86066be6985@syzkaller.appspotmail.com
Fix commit: 3da6bb419750 perf/core: Fix WARN in perf_sigtrap()
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu-native-arm64-kvm]
First crash: 50d, last: 24d
Discussions (7)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 5.15 2/3] perf/core: Fix WARN in perf_sigtrap() 1 (1) 2025/07/14 23:08
[PATCH AUTOSEL 6.1 3/4] perf/core: Fix WARN in perf_sigtrap() 1 (1) 2025/07/14 23:07
[PATCH AUTOSEL 6.6 4/6] perf/core: Fix WARN in perf_sigtrap() 1 (1) 2025/07/14 23:07
[PATCH AUTOSEL 6.12 07/12] perf/core: Fix WARN in perf_sigtrap() 1 (1) 2025/07/14 23:07
[PATCH AUTOSEL 6.15 08/15] perf/core: Fix WARN in perf_sigtrap() 1 (1) 2025/07/14 23:06
[PATCH] perf/core: Fix WARN in perf_sigtrap() 5 (6) 2025/07/10 12:46
[syzbot] [perf?] WARNING in perf_pending_task 1 (2) 2025/06/29 10:51
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 13 4d04h 39d 0/2 upstream: reported C repro on 2025/07/03 08:45
linux-6.1 WARNING in perf_pending_task origin:upstream -1 C 60 20h09m 45d 0/3 upstream: reported C repro on 2025/06/27 13:50
linux-5.15 WARNING in perf_pending_task origin:upstream -1 C 46 1d00h 43d 0/3 upstream: reported C repro on 2025/06/29 10:30
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/07/05 14:43 20m penguin-kernel@i-love.sakura.ne.jp patch upstream OK log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5309 at kernel/events/core.c:7211 perf_sigtrap kernel/events/core.c:7211 [inline]
WARNING: CPU: 0 PID: 5309 at kernel/events/core.c:7211 perf_pending_task+0x319/0x400 kernel/events/core.c:7325
Modules linked in:
CPU: 0 UID: 0 PID: 5309 Comm: syz-executor122 Not tainted 6.16.0-rc2-syzkaller-00378-gb67ec639010f #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:perf_sigtrap kernel/events/core.c:7211 [inline]
RIP: 0010:perf_pending_task+0x319/0x400 kernel/events/core.c:7325
Code: 85 8f 00 00 00 41 fe 4d 00 eb 05 e8 21 4f cd ff 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 4e 34 76 09 cc e8 08 4f cd ff 90 <0f> 0b 90 41 80 3c 1c 00 0f 85 02 ff ff ff e9 05 ff ff ff 44 89 e1
RSP: 0018:ffffc9000d41f9d0 EFLAGS: 00010293
RAX: ffffffff81f2fe18 RBX: dffffc0000000000 RCX: ffff888032cbc880
RDX: 0000000000000000 RSI: 0000000074971a36 RDI: 0000000000000000
RBP: 0000000074971a36 R08: ffffffff8fa10af7 R09: 1ffffffff1f4215e
R10: dffffc0000000000 R11: ffffffff81f2fb00 R12: 1ffff110035f390f
R13: ffff888032cbc880 R14: ffff88801af9cad8 R15: ffff88801af9c878
FS:  0000000000000000(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000018 CR3: 000000000df38000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x22e0 kernel/exit.c:964
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1105
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ae420dab9
Code: Unable to access opcode bytes at 0x7f9ae420da8f.
RSP: 002b:00007ffd20a313c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 00007f9ae420dab9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f9ae42805f0 R08: 0000000000000000 R09: 0000000000000006
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (35773):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/22 23:55 upstream b67ec639010f d6cdfb8a .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in perf_pending_task
2025/06/22 23:26 upstream b67ec639010f d6cdfb8a .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in perf_pending_task
2025/07/12 10:12 upstream 379f604cc3dc 3cda49cf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in perf_pending_task
2025/07/18 23:53 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 23:40 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 22:23 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 21:09 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 19:25 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 18:08 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 16:56 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 16:02 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 15:33 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/18 14:57 bpf 0238c45fbbf8 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in perf_pending_task
2025/07/19 05:08 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 04:50 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 04:26 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 04:09 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 03:55 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 03:37 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 03:18 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 03:03 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 02:44 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 02:20 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 01:59 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 01:36 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 01:02 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 00:35 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/19 00:13 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 23:18 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 23:03 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 22:44 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 22:05 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 21:53 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 21:40 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 21:27 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 20:59 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 20:39 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 20:23 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 20:05 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 19:44 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 19:10 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 18:47 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 17:37 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 17:16 bpf-next 0ee30d937c14 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 15:45 bpf-next 0768e980feb5 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
2025/07/18 15:17 bpf-next 0768e980feb5 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in perf_pending_task
* Struck through repros no longer work on HEAD.