INFO: task syz-executor4:22200 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc7+ #279
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D25280 22200   5914 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 fanotify_get_response fs/notify/fanotify/fanotify.c:68 [inline]
 fanotify_handle_event+0x7fb/0x9a0 fs/notify/fanotify/fanotify.c:245
 send_to_group fs/notify/fsnotify.c:234 [inline]
 fsnotify+0x87f/0x12f0 fs/notify/fsnotify.c:367
 fsnotify_perm include/linux/fsnotify.h:52 [inline]
 security_file_open+0x16f/0x1b0 security/security.c:986
 do_dentry_open+0x331/0x1250 fs/open.c:758
 vfs_open+0xa0/0xd0 fs/open.c:880
 do_last fs/namei.c:3418 [inline]
 path_openat+0x12bf/0x5160 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x568/0x700 fs/open.c:1063
 ksys_open include/linux/syscalls.h:1276 [inline]
 __do_sys_creat fs/open.c:1121 [inline]
 __se_sys_creat fs/open.c:1119 [inline]
 __x64_sys_creat+0x61/0x80 fs/open.c:1119
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457519
Code: Bad RIP value.
RSP: 002b:00007f5052650c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f50526516d4
R13: 00000000004bdae2 R14: 00000000004cc628 R15: 00000000ffffffff
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 985 Comm: khungtaskd Not tainted 4.19.0-rc7+ #279
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0xb3e/0x1050 kernel/hung_task.c:265
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 0 to CPUs 1:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.015 msecs
NMI backtrace for cpu 1
CPU: 1 PID: 3197 Comm: udevd Not tainted 4.19.0-rc7+ #279
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:805 [inline]
RIP: 0010:lock_release+0x10c/0x970 kernel/locking/lockdep.c:3915
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 47 07 00 00 48 83 3d bc ff d0 07 00 0f 84 80 06 00 00 9c 58 <0f> 1f 44 00 00 48 c7 c7 90 f2 31 89 48 89 85 e0 fe ff ff 48 b8 00
RSP: 0018:ffff8801c83673a0 EFLAGS: 00000286
RAX: 0000000000000286 RBX: 1ffff1003906ce78 RCX: 1ffff1003906cea5
RDX: 1ffffffff1263e50 RSI: 0000000000000001 RDI: ffffffff8931f280
RBP: ffff8801c83674c8 R08: 0000000000000000 R09: ffffed00390ebc70
R10: ffffed00390ebc70 R11: ffff8801c875e383 R12: ffff8801c8358200
R13: ffff8801c83674a0 R14: ffff8801c875e400 R15: ffff8801c875e300
FS:  00007f0491f4e7a0(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001c8209000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __mutex_unlock_slowpath+0x102/0x8c0 kernel/locking/mutex.c:1197
 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713
 ep_scan_ready_list+0xbeb/0x1050 fs/eventpoll.c:755
 ep_send_events fs/eventpoll.c:1713 [inline]
 ep_poll+0x572/0x13d0 fs/eventpoll.c:1840
 do_epoll_wait+0x1b0/0x200 fs/eventpoll.c:2198
 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2205 [inline]
 __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0491662943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007ffe77d22308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f0491662943
RDX: 0000000000000008 RSI: 00007ffe77d22400 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 000000000227b880 R15: 0000000002272250