INFO: task kworker/u4:6:7714 blocked for more than 140 seconds. Not tainted 4.14.138+ #30 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:6 D27536 7714 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 cleanup_net+0x136/0x870 net/core/net_namespace.c:450 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<00000000da7ca4b7>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1758: #0: (&tty->ldisc_sem){++++}, at: [<00000000aabf0bf0>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ee103dbf>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 3 locks held by kworker/u4:6/7714: #0: ("%s""netns"){+.+.}, at: [<0000000035a84934>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: (net_cleanup_work){+.+.}, at: [<000000006c570d3a>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 #2: (net_mutex){+.+.}, at: [<0000000054782eb0>] cleanup_net+0x136/0x870 net/core/net_namespace.c:450 1 lock held by syz-executor.4/13047: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13054: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13056: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13069: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13077: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13109: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13113: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13117: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13122: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13148: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13158: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13169: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13175: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13177: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13184: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13188: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13195: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13198: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13210: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13211: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13236: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13273: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13274: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13292: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13293: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/13294: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13295: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13303: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13307: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13332: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13335: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13385: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13423: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13444: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13467: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13480: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13509: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13527: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13563: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13603: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13651: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13681: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13706: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13726: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13757: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13768: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13771: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13787: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13789: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13797: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13798: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13809: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/13842: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13843: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/13850: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13854: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13885: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13905: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13932: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13936: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/13961: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/13981: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/13983: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14020: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14040: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14049: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14056: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14057: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14065: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14080: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14101: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14117: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14119: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14127: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14134: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14139: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14144: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14164: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14166: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14171: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14179: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14185: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14197: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14218: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14223: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14244: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14248: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14249: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14255: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14284: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14291: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14295: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14299: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14309: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14312: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14324: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14326: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14346: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14392: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14427: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14449: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14483: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14491: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14510: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14515: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14548: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14556: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14567: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14573: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14587: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14592: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14638: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14656: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14668: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14669: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14677: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14689: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14736: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/14746: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.1/14765: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.5/14783: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14793: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/14827: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14867: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14897: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/14972: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/14985: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15019: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/15021: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/15027: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15117: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15178: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15233: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15353: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15384: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15404: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15438: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15473: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15504: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/15726: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15766: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15835: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/15877: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/15931: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16068: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16135: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16216: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16268: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16332: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16388: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16446: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/16463: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16495: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16566: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/16586: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16615: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/16629: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16706: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16775: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16833: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16880: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16926: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/16980: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17001: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17077: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17128: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17216: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17313: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17421: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17488: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17534: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17598: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17670: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17721: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17781: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17831: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17883: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/17968: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18035: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18150: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18218: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18263: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/18290: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18315: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18441: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18452: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18517: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18578: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18621: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18669: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18724: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18758: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18789: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18832: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18860: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18891: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18919: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/18972: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/18974: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19013: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19030: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19062: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19097: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19126: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19165: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19229: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19260: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/19293: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19301: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19314: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19350: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19404: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19434: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/19439: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19472: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/19485: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19493: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19518: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/19525: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19554: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.3/19573: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19613: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19621: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19674: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19681: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19720: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.4/19721: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19768: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19823: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19866: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19916: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/19995: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20039: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20086: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20094: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20136: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20175: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20219: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20259: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20297: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20316: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20344: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20369: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20387: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.0/20405: #0: (net_mutex){+.+.}, at: [<0000000066a1cbf4>] copy_net_ns+0x150/0x480 net/core/net_namespace.c:410 1 lock held by syz-executor.2/21131: #0: (&mm->mmap_sem){++++}, at: [<0000000010303dc0>] vm_mmap_pgoff+0x147/0x1c0 mm/util.c:331 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.138+ #30 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21172 Comm: syz-executor.0 Not tainted 4.14.138+ #30 task: 0000000000d60ba1 task.stack: 00000000b2d9a93e RIP: 0010:pick_next_task kernel/sched/core.c:3290 [inline] RIP: 0010:__schedule+0x363/0x1f80 kernel/sched/core.c:3420 RSP: 0018:ffff88816352f5b8 EFLAGS: 00000002 RAX: ffff88816e058638 RBX: 0000000000000001 RCX: 1ffffffff11028a0 RDX: 1ffff1103b745576 RSI: 00000000ffffffff RDI: 0000000000000046 RBP: ffff88816352f688 R08: 0000000000007855 R09: ffffed103b745449 R10: ffffed103b745448 R11: ffff8881dba2a243 R12: ffff8881dba2a240 R13: 000000000002a240 R14: dffffc0000000000 R15: ffff88816e058000 FS: 00007feebf363700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e821000 CR3: 0000000189c26001 CR4: 00000000001606b0 Call Trace: preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] zap_pte_range mm/memory.c:1399 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xb90/0x1320 mm/memory.c:1515 unmap_single_vma+0x118/0x170 mm/memory.c:1560 unmap_vmas+0x43/0xa0 mm/memory.c:1590 exit_mmap+0x213/0x440 mm/mmap.c:3072 __mmput kernel/fork.c:938 [inline] mmput+0xeb/0x370 kernel/fork.c:959 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:861 do_group_exit+0x100/0x2e0 kernel/exit.c:977 get_signal+0x39f/0x1cc0 kernel/signal.c:2409 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459829 RSP: 002b:00007feebf362c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007feebf3636d4 R13: 00000000004c5d12 R14: 00000000004da738 R15: 00000000ffffffff Code: 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 10 1a 00 00 41 f6 47 24 20 0f 85 3c 0b 00 00 49 8d 87 30 06 00 00 48 89 85 60 ff ff ff <49> 8d 7f 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03