syzbot


INFO: task hung in static_key_disable_cpuslocked (2)

Status: auto-obsoleted due to no activity on 2026/02/16 21:05
Subsystems: bpf
[Documentation on labels]
First crash: 111d, last: 111d
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in static_key_disable_cpuslocked kernel 1 3 583d 618d 0/29 auto-obsoleted due to no activity on 2024/11/02 01:37

Sample crash report:
INFO: task syz.2.488:8001 blocked for more than 153 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.488       state:D stack:25672 pid:8001  tgid:8000  ppid:5839   task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
 jump_label_lock kernel/jump_label.c:27 [inline]
 static_key_disable_cpuslocked+0x8d/0x1b0 kernel/jump_label.c:238
 static_key_disable+0x1a/0x20 kernel/jump_label.c:248
 tracepoint_remove_func kernel/tracepoint.c:370 [inline]
 tracepoint_probe_unregister+0x80e/0x9b0 kernel/tracepoint.c:504
 bpf_raw_tp_link_release+0x43/0x70 kernel/bpf/syscall.c:3754
 bpf_link_free+0xed/0x330 kernel/bpf/syscall.c:3265
 bpf_link_put_direct kernel/bpf/syscall.c:3308 [inline]
 bpf_link_release+0x6b/0x80 kernel/bpf/syscall.c:3315
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc1158f6c9
RSP: 002b:00007fdc1237b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 00007fdc117e5fa0 RCX: 00007fdc1158f6c9
RDX: 0000000000000010 RSI: 0000200000000180 RDI: 0000000000000008
RBP: 00007fdc11611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdc117e6038 R14: 00007fdc117e5fa0 R15: 00007ffd8afb91e8
 </TASK>

Showing all locks held in the system:
1 lock held by kworker/R-rcu_g/4:

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/18 20:55 net-next a057e8e4ac5b ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in static_key_disable_cpuslocked
* Struck through repros no longer work on HEAD.