INFO: task udevd:3907 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc1+ #78
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd           D23792  3907      1 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:1003 [inline]
 __mutex_lock+0x751/0x1340 kernel/locking/mutex.c:1073
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
 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:2267 [inline]
 path_lookupat.isra.0+0xe3/0x8d0 fs/namei.c:2315
 filename_lookup+0x1b0/0x410 fs/namei.c:2346
 user_path_at_empty+0x43/0x50 fs/namei.c:2606
 do_readlinkat+0xe9/0x320 fs/stat.c:399
 __do_sys_readlink fs/stat.c:432 [inline]
 __se_sys_readlink fs/stat.c:429 [inline]
 __x64_sys_readlink+0x78/0xb0 fs/stat.c:429
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fe5e64fd577
Code: Bad RIP value.
RSP: 002b:00007ffc417e1e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 0000000000709030 RCX: 00007fe5e64fd577
RDX: 0000000000000400 RSI: 00007ffc417e1e20 RDI: 00007ffc417e2300
RBP: 00007ffc417e2b60 R08: 00007ffc417e2b60 R09: 00007fe5e6551de0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc417e2300
R13: 0000000000000400 R14: 000000000073dfb0 R15: 0000000000709030
INFO: task syz-executor.0:11596 blocked for more than 147 seconds.
      Not tainted 5.3.0-rc1+ #78
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D24264 11596  11595 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:1003 [inline]
 __mutex_lock+0x751/0x1340 kernel/locking/mutex.c:1073
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
 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