INFO: task syz-executor:18149 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc6-syzkaller-00308-gb31c44928842 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:19344 pid:18149 tgid:18149 ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_workqueue+0x7d6/0x1710 kernel/workqueue.c:3968
 drain_workqueue+0xc9/0x3a0 kernel/workqueue.c:4081
 destroy_workqueue+0xba/0xc40 kernel/workqueue.c:5785
 btrfs_destroy_workqueue+0x45/0x260 fs/btrfs/async-thread.c:360
 btrfs_stop_all_workers+0x3d/0x2a0 fs/btrfs/disk-io.c:1780
 close_ctree+0x67d/0xd20 fs/btrfs/disk-io.c:4361
 generic_shutdown_super+0x136/0x2d0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1237
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2121
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f12e137cef9
RSP: 002b:00007fff7753f5e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f12e13eef09 RCX: 00007f12e137cef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000005 R08: 00007fff7753d387 R09: 00007fff775408a0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff775408a0
R13: 00007f12e13eeee4 R14: 0000555565f1e4a8 R15: 00007fff77541960
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-00308-gb31c44928842 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4657 Comm: syslogd Not tainted 6.11.0-rc6-syzkaller-00308-gb31c44928842 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:sock_read_iter+0x2cd/0x3e0 net/socket.c:1139
Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 fc 00 00 00 8b 94 24 84 00 00 00 48 8b 7c 24 10 48 8d 74 24 40 e8 06 22 ff ff 48 63 d8 <ba> 28 00 00 00 48 8b 7c 24 08 48 8b 74 24 18 e8 ef 0d 83 f8 eb 07
RSP: 0018:ffffc90003d57b60 EFLAGS: 00000286
RAX: 0000000000000050 RBX: 0000000000000050 RCX: ffff88807cb70000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffc90003d578e0
RBP: ffffc90003d57c90 R08: ffffc90003d578e7 R09: 1ffff920007aaf1c
R10: dffffc0000000000 R11: fffff520007aaf1d R12: dffffc0000000000
R13: 1ffff920007aaf70 R14: ffffc90003d57d28 R15: ffffc90003d57be4
FS:  00007fe35248c380(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce47fb5ec0 CR3: 000000003459e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x9bd/0xbc0 fs/read_write.c:476
 ksys_read+0x1a0/0x2c0 fs/read_write.c:619
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3525e0b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fffb0e8e0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe3525e0b6a
RDX: 00000000000000ff RSI: 000055fc782b5950 RDI: 0000000000000000
RBP: 000055fc782b5910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007fe35277f3a3 R11: 0000000000000246 R12: 000055fc782b59a1
R13: 000055fc782b5950 R14: 0000000000000000 R15: 00007fe3527c4a80
 </TASK>