BTRFS error (device loop4): superblock checksum mismatch
BTRFS error (device loop4): open_ctree failed
BTRFS error (device loop4): unsupported checksum algorithm 3786
BTRFS error (device loop4): superblock checksum mismatch
BTRFS error (device loop4): open_ctree failed
INFO: task syz-executor2:17614 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc7+ #54
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D23280 17614  30226 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:00007f8dfb380c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8dfb3816d4
R13: 00000000004bdae2 R14: 00000000004cc628 R15: 00000000ffffffff
INFO: task syz-executor2:17619 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc7+ #54
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D23840 17619  30226 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:00007f8dfb35fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8dfb3606d4
R13: 00000000004bdae2 R14: 00000000004cc628 R15: 00000000ffffffff
INFO: task syz-executor2:17647 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc7+ #54
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D25352 17647  30226 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
 __do_sys_openat fs/open.c:1090 [inline]
 __se_sys_openat fs/open.c:1084 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1084
 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:00007f8dfb31dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457519
RDX: 0000000000000000 RSI: 0000000020000140 RDI: ffffffffffffff9c
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8dfb31e6d4
R13: 00000000004c2b1e R14: 00000000004d4158 R15: 00000000ffffffff
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 979 Comm: khungtaskd Not tainted 4.19.0-rc7+ #54
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: 1.402 msecs
NMI backtrace for cpu 1
CPU: 1 PID: 3195 Comm: udevd Not tainted 4.19.0-rc7+ #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_lockdep_rcu_enabled+0x26/0x90 kernel/rcu/update.c:252
Code: 00 00 00 00 48 c7 c7 90 bf f3 89 55 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 89 e5 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 <83> c0 03 38 d0 7c 04 84 d2 75 4c 8b 15 29 f7 8b 08 85 d2 74 3e 48
RSP: 0018:ffff8801c7a17198 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff10038f42e3a RCX: ffffffff81e493fd
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffffffff89f3bf90
RBP: ffff8801c7a17198 R08: ffff8801c7a0e180 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801c7dbc883 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007fa7972ed7a0(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001c7f6a000 CR4: 00000000001406e0
Call Trace:
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x3fa/0x520 kernel/locking/lockdep.c:3899
 __mutex_lock_common kernel/locking/mutex.c:925 [inline]
 __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 ep_scan_ready_list+0xd2d/0x1050 fs/eventpoll.c:690
 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: 0033:0x7fa796a01943
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:00007ffd9eafb508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fa796a01943
RDX: 0000000000000008 RSI: 00007ffd9eafb600 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 000000000147d880 R15: 0000000001464250