INFO: task syz.3.18051:10396 blocked for more than 150 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.18051     state:D stack:25016 pid:10396 tgid:10396 ppid:6844   task_flags:0x40004c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7379
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3857
 netdev_run_todo+0x2ff/0x10d0 net/core/dev.c:11710
 tun_detach drivers/net/tun.c:647 [inline]
 tun_chr_close+0x13c/0x1c0 drivers/net/tun.c:3506
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:1004
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
 __do_sys_exit_group kernel/exit.c:1158 [inline]
 __se_sys_exit_group kernel/exit.c:1156 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1156
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d5399ce59
RSP: 002b:00007fff9b74b6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f0d5399ce59
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 0000000000001386 R08: 00007fff9b74bb37 R09: 000000000000000b
R10: 00007f0d53c15fa0 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f0d53c1627c R14: 00007f0d53c16278 R15: 00007f0d53c16270
 </TASK>
INFO: task syz.1.18053:10406 blocked for more than 154 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.