INFO: task kworker/dying:22 blocked for more than 140 seconds. Not tainted 4.9.185+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/dying D26776 22 2 0x80000000 0000000000000087 ffff8801d9c20000 0000000000000000 ffff8801db721000 ffff8801da6b2f80 ffff8801db721018 ffff8801d9c2f8c0 ffffffff8280c5ae 0000000000000246 ffff8801d9c20000 0000000000000000 ffff8801db7218f0 Call Trace: [<0000000042c6e244>] schedule+0x92/0x1c0 /kernel/sched/core.c:3546 [<000000001a843f2d>] __rt_mutex_slowlock+0x99/0x290 /kernel/locking/rtmutex.c:1221 [<00000000b4d1b24c>] rt_mutex_slowlock+0x199/0x4c0 /kernel/locking/rtmutex.c:1293 [<000000001f365f60>] rt_mutex_fastlock /kernel/locking/rtmutex.c:1439 [inline] [<000000001f365f60>] rt_mutex_lock+0x2d/0x40 /kernel/locking/rtmutex.c:1499 [<00000000cf427f51>] process_notifier /drivers/misc/uid_sys_stats.c:636 [inline] [<00000000cf427f51>] process_notifier+0x96/0x670 /drivers/misc/uid_sys_stats.c:625 [<000000001ae63217>] notifier_call_chain+0xb4/0x1d0 /kernel/notifier.c:93 [<00000000c034d95c>] __blocking_notifier_call_chain /kernel/notifier.c:317 [inline] [<00000000c034d95c>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] [<00000000c034d95c>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] [<00000000c034d95c>] blocking_notifier_call_chain+0x80/0xa0 /kernel/notifier.c:325 [<000000004ef3d6a6>] profile_task_exit+0x1f/0x30 /kernel/profile.c:140 [<00000000a6893897>] do_exit+0x90/0x2aa0 /kernel/exit.c:744 [<000000002b0684d1>] kthread+0x22b/0x310 /kernel/kthread.c:214 [<00000000f64e9440>] ret_from_fork+0x5c/0x70 /arch/x86/entry/entry_64.S:375 Showing all locks held in the system: 1 lock held by kworker/dying/3: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/5: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/22: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<000000009b8bfa74>] check_hung_uninterruptible_tasks /kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000009b8bfa74>] watchdog+0x14b/0xaf0 /kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000689ab3fb>] debug_show_all_locks+0x7f/0x21f /kernel/locking/lockdep.c:4336 1 lock held by kworker/dying/64: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 3 locks held by rs:main Q:Reg/1892: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000c7bded42>] __fdget_pos+0xa8/0xd0 /fs/file.c:782 #1: (sb_writers#4){.+.+.+}, at: [<00000000fb85a170>] file_start_write /./include/linux/fs.h:2646 [inline] #1: (sb_writers#4){.+.+.+}, at: [<00000000fb85a170>] vfs_write+0x3e9/0x520 /fs/read_write.c:558 #2: (&sb->s_type->i_mutex_key#9){++++++}, at: [<000000003818eada>] inode_lock /./include/linux/fs.h:771 [inline] #2: (&sb->s_type->i_mutex_key#9){++++++}, at: [<000000003818eada>] __generic_file_fsync+0xcd/0x1c0 /fs/libfs.c:978 1 lock held by rsyslogd/1894: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000c7bded42>] __fdget_pos+0xa8/0xd0 /fs/file.c:782 2 locks held by getty/2022: #0: (&tty->ldisc_sem){++++++}, at: [<00000000de042d3f>] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000330a9b7a>] n_tty_read+0x1fe/0x1820 /drivers/tty/n_tty.c:2156 1 lock held by syz-executor.5/2099: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.2/2101: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 2 locks held by kworker/u4:2/2109: #0: ("events_unbound"){.+.+.+}, at: [<00000000757e9694>] process_one_work+0x790/0x1600 /kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<000000009f442cd4>] process_one_work+0x7ce/0x1600 /kernel/workqueue.c:2111 1 lock held by kworker/dying/2119: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/2159: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/2170: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/2184: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4923: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4928: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4937: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4945: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4953: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4969: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4972: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4978: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/4984: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 2 locks held by kworker/u4:18/4988: #0: ("events_unbound"){.+.+.+}, at: [<00000000757e9694>] process_one_work+0x790/0x1600 /kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<000000009f442cd4>] process_one_work+0x7ce/0x1600 /kernel/workqueue.c:2111 1 lock held by syz-executor.0/5075: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/5390: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/6909: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/8725: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by kworker/dying/9971: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by udevd/10028: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by udevd/10369: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.4/11368: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.3/13917: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.0/15741: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.0/15749: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.0/15758: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.0/15775: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.3/15764: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.3/15772: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.3/15780: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.2/15765: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.2/15768: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.2/15779: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.5/15774: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.5/15776: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.5/15777: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.4/15778: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.4/15782: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.4/15785: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/15781: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/15783: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/15786: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/15788: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by syz-executor.1/15789: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by modprobe/15784: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by modprobe/15787: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15790: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15791: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15792: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15793: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15794: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 1 lock held by getty/15795: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] __blocking_notifier_call_chain /kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain /kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000b1c414b1>] blocking_notifier_call_chain+0x6a/0xa0 /kernel/notifier.c:325 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.185+ #8 ffff8801d98d7cc8 ffffffff81b5a081 0000000000000000 0000000000000000 0000000000000000 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b6531c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<0000000059cf87f9>] __dump_stack /lib/dump_stack.c:15 [inline] [<0000000059cf87f9>] dump_stack+0xc1/0x120 /lib/dump_stack.c:51 [<000000001da12acf>] nmi_cpu_backtrace.cold+0x47/0x87 /lib/nmi_backtrace.c:99 [<0000000065aac42b>] nmi_trigger_cpumask_backtrace+0x124/0x155 /lib/nmi_backtrace.c:60 [<0000000050390073>] arch_trigger_cpumask_backtrace+0x14/0x20 /arch/x86/kernel/apic/hw_nmi.c:37 [<00000000d62a9915>] trigger_all_cpu_backtrace /./include/linux/nmi.h:58 [inline] [<00000000d62a9915>] check_hung_task /kernel/hung_task.c:126 [inline] [<00000000d62a9915>] check_hung_uninterruptible_tasks /kernel/hung_task.c:183 [inline] [<00000000d62a9915>] watchdog+0x670/0xaf0 /kernel/hung_task.c:263 [<00000000138f0ba2>] kthread+0x278/0x310 /kernel/kthread.c:211 [<00000000f64e9440>] ret_from_fork+0x5c/0x70 /arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff8281b701