blktrace: Concurrent blktraces are not allowed on loop6
blktrace: Concurrent blktraces are not allowed on loop6
INFO: task syz-executor.6:17123 blocked for more than 143 seconds.
      Not tainted 5.10.176 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.6  state:D stack:27952 pid:17123 ppid:   286 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3797 [inline]
 __schedule+0x824/0x1ea0 kernel/sched/core.c:4545
 schedule+0xcb/0x270 kernel/sched/core.c:4623
 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4682
 __mutex_lock_common kernel/locking/mutex.c:1047 [inline]
 __mutex_lock+0x7a8/0x10b0 kernel/locking/mutex.c:1109
 perf_event_ctx_lock_nested+0x243/0x4f0 kernel/events/core.c:1386
 perf_event_ctx_lock kernel/events/core.c:1399 [inline]
 perf_event_release_kernel+0x3a6/0xc50 kernel/events/core.c:5072
 perf_release+0x33/0x50 kernel/events/core.c:5170
 __fput+0x285/0x980 fs/file_table.c:281
 task_work_run+0xe2/0x1a0 kernel/task_work.c:161
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x186/0x190 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x38/0x1e0 kernel/entry/common.c:274
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fda206d872b
RSP: 002b:00007fffb3dc9830 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007fda206d872b
RDX: ffffffffffffffbc RSI: 0000000000000081 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fda2083f1b0
R13: 00007fffb3dc9950 R14: 00007fda20838f60 R15: 000000000034e03f
INFO: task syz-executor.6:17124 blocked for more than 143 seconds.
      Not tainted 5.10.176 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.6  state:D stack:27952 pid:17124 ppid:   286 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3797 [inline]
 __schedule+0x824/0x1ea0 kernel/sched/core.c:4545
 schedule+0xcb/0x270 kernel/sched/core.c:4623
 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4682
 __mutex_lock_common kernel/locking/mutex.c:1047 [inline]
 __mutex_lock+0x7a8/0x10b0 kernel/locking/mutex.c:1109
 mutex_lock_double kernel/events/core.c:11598 [inline]
 __perf_event_ctx_lock_double kernel/events/core.c:11742 [inline]
 __do_sys_perf_event_open+0x1248/0x2d50 kernel/events/core.c:12015
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fda20725b19
RSP: 002b:00007fda1dc9b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fda20838f60 RCX: 00007fda20725b19
RDX: 0000000000000000 RSI: 0000000000000552 RDI: 0000000020001d80
RBP: 00007fda2077ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffb3dc97cf R14: 00007fda1dc9b300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/22:
 #0: ffffffff84ff7ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x27b kernel/locking/lockdep.c:6390
1 lock held by in:imklog/177:
1 lock held by syz-executor.6/17123:
 #0: ffff888049d65cb0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_ctx_lock_nested+0x243/0x4f0 kernel/events/core.c:1386
3 locks held by syz-executor.6/17124:
 #0: ffff88804569f458 (&sig->exec_update_lock){++++}-{3:3}, at: __do_sys_perf_event_open+0xfc5/0x2d50 kernel/events/core.c:11997
 #1: ffff888049d65cb0 (&ctx->mutex){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11597 [inline]
 #1: ffff888049d65cb0 (&ctx->mutex){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11742 [inline]
 #1: ffff888049d65cb0 (&ctx->mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x123b/0x2d50 kernel/events/core.c:12015
 #2: ffff888049d65cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: mutex_lock_double kernel/events/core.c:11598 [inline]
 #2: ffff888049d65cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __perf_event_ctx_lock_double kernel/events/core.c:11742 [inline]
 #2: ffff888049d65cb0 (&ctx->mutex/1){+.+.}-{3:3}, at: __do_sys_perf_event_open+0x1248/0x2d50 kernel/events/core.c:12015

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