syzbot


INFO: task hung in perf_uprobe_destroy (2)

Status: auto-closed as invalid on 2022/01/13 17:48
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 388d, last: 388d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in perf_uprobe_destroy 2 1366d 1397d 0/24 auto-closed as invalid on 2019/09/08 15:37

Sample crash report:
INFO: task syz-executor.2:22734 blocked for more than 141 seconds.
      Not tainted 5.15.0-next-20211112-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:28776 pid:22734 ppid:  6545 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4984 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6265
 schedule+0xd2/0x260 kernel/sched/core.c:6338
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6397
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 perf_uprobe_destroy+0x23/0x130 kernel/trace/trace_event_perf.c:347
 _free_event+0x2ee/0x1390 kernel/events/core.c:4982
 put_event kernel/events/core.c:5076 [inline]
 perf_event_release_kernel+0x6f2/0x940 kernel/events/core.c:5191
 perf_release+0x33/0x40 kernel/events/core.c:5201
 __fput+0x286/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xc14/0x2b40 kernel/exit.c:832
 do_group_exit+0x125/0x310 kernel/exit.c:929
 get_signal+0x47d/0x2220 kernel/signal.c:2830
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4775a97ae9
RSP: 002b:00007f477300d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f4775baaf68 RCX: 00007f4775a97ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4775baaf68
RBP: 00007f4775baaf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4775baaf6c
R13: 00007ffdd557babf R14: 00007f477300d300 R15: 0000000000022000
 </TASK>

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/11/14 17:46 linux-next f2e19fd15bd7 83f5c9b5 .config log report info INFO: task hung in perf_uprobe_destroy
* Struck through repros no longer work on HEAD.