INFO: task syz-executor.0:6215 blocked for more than 143 seconds.
      Not tainted 5.2.0-rc3+ #34
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28128  6215   8864 0x80004006
Call Trace:
 context_switch kernel/sched/core.c:2818 [inline]
 __schedule+0x7cb/0x1560 kernel/sched/core.c:3445
 schedule+0xa8/0x260 kernel/sched/core.c:3509
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:601 [inline]
 rwsem_down_write_failed+0x7a1/0xc60 kernel/locking/rwsem-xadd.c:633
 __down_write kernel/locking/rwsem.h:227 [inline]
 down_write+0x93/0xa0 kernel/locking/rwsem.c:68
 unregister_netdevice_notifier+0x7e/0x390 net/core/dev.c:1713
 bcm_release+0x93/0x5d0 net/can/bcm.c:1525
 __sock_release+0xce/0x2a0 net/socket.c:601
 sock_close+0x1b/0x30 net/socket.c:1273
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x90a/0x2fa0 kernel/exit.c:877
 do_group_exit+0x135/0x370 kernel/exit.c:981
 get_signal+0x471/0x24b0 kernel/signal.c:2640