INFO: task kworker/0:1:12 blocked for more than 145 seconds.
      Not tainted 5.3.0-rc1+ #80
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:1     D26528    12      2 0x80004000
Workqueue: events kernfs_notify_workfn
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xa8/0x270 kernel/sched/core.c:3944
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003
 __mutex_lock_common kernel/locking/mutex.c:1007 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092
 kernfs_notify_workfn+0xe0/0x490 fs/kernfs/file.c:882
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task syz-executor.0:15275 blocked for more than 148 seconds.
      Not tainted 5.3.0-rc1+ #80
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D24264 15275  15274 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xa8/0x270 kernel/sched/core.c:3944
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003
 __mutex_lock_common kernel/locking/mutex.c:1007 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092
 kernfs_iop_permission+0x66/0xb0 fs/kernfs/inode.c:283
 do_inode_permission fs/namei.c:384 [inline]
 inode_permission+0x36b/0x560 fs/namei.c:449
 may_lookup fs/namei.c:1700 [inline]
 link_path_walk.part.0+0x9fa/0x1340 fs/namei.c:2082
 link_path_walk fs/namei.c:2070 [inline]
 path_mountpoint+0xe0/0x1e60 fs/namei.c:2692
 filename_mountpoint+0x190/0x3c0 fs/namei.c:2715
 user_path_mountpoint_at+0x3a/0x50 fs/namei.c:2745
 ksys_umount+0x167/0xf00 fs/namespace.c:1680
 __do_sys_umount fs/namespace.c:1706 [inline]
 __se_sys_umount fs/namespace.c:1704 [inline]
 __x64_sys_umount+0x54/0x80 fs/namespace.c:1704
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c257
Code: Bad RIP value.
RSP: 002b:00007ffecc19a6d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000055 RCX: 000000000045c257
RDX: 0000000000403520 RSI: 0000000000000002 RDI: 00007ffecc19a780
RBP: 0000000000000642 R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000202 R12: 00007ffecc19b810
R13: 0000555556239940 R14: 0000000000000000 R15: 00007ffecc19b810
INFO: task syz-executor.5:23391 blocked for more than 152 seconds.
      Not tainted 5.3.0-rc1+ #80
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D24232 23391  23390 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xa8/0x270 kernel/sched/core.c:3944
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003
 __mutex_lock_common kernel/locking/mutex.c:1007 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092
 kernfs_iop_permission+0x66/0xb0 fs/kernfs/inode.c:283