audit: type=1400 audit(337.894:1095): avc: denied { map } for pid=23964 comm="blkid" path="/lib/x86_64-linux-gnu/libuuid.so.1.3.0" dev="sda1" ino=2819 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 ip6_tunnel:  xmit: Local address not yet configured! INFO: task kworker/u4:14:8614 blocked for more than 140 seconds. Not tainted 4.14.68+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:14 D27048 8614 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1718 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x3bc/0x4e0 kernel/sched/completion.c:123 flush_work+0x3b8/0x6e0 kernel/workqueue.c:2885 flush_all_backlogs net/core/dev.c:4638 [inline] rollback_registered_many+0x505/0xac0 net/core/dev.c:7168 unregister_netdevice_many+0x43/0x210 net/core/dev.c:8231 sit_exit_net+0x42a/0x600 net/ipv6/sit.c:1868 ops_exit_list.isra.3+0xa8/0x150 net/core/net_namespace.c:142 cleanup_net+0x3e9/0x880 net/core/net_namespace.c:483 process_one_work+0x86e/0x15c0 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task syz-executor5:9562 blocked for more than 140 seconds. Not tainted 4.14.68+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D27624 9562 1852 0x80000002 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tun_detach drivers/net/tun.c:593 [inline] tun_chr_close+0x33/0x50 drivers/net/tun.c:2662 __fput+0x25e/0x6f0 fs/file_table.c:210 task_work_run+0x116/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x8f8/0x2800 kernel/exit.c:865 do_group_exit+0x100/0x2e0 kernel/exit.c:968 get_signal+0x4e5/0x1470 kernel/signal.c:2348 do_signal+0x8f/0x1660 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x116/0x150 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457099 RSP: 002b:00007f36ad9decf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000009300a8 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000009300a8 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009300ac R13: 00007ffd626c004f R14: 00007f36ad9df9c0 R15: 0000000000000000 INFO: task kworker/1:4:19543 blocked for more than 140 seconds. Not tainted 4.14.68+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:4 D29272 19543 2 0x80000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4432 process_one_work+0x86e/0x15c0 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task syz-executor5:20773 blocked for more than 140 seconds. Not tainted 4.14.68+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D27624 20773 20769 0x80000002 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 raw_close+0xe/0x30 net/ipv4/raw.c:699 inet_release+0xf7/0x1c0 net/ipv4/af_inet.c:444 __sock_release+0xce/0x250 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1138 __fput+0x25e/0x6f0 fs/file_table.c:210 task_work_run+0x116/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x8f8/0x2800 kernel/exit.c:865 do_group_exit+0x100/0x2e0 kernel/exit.c:968 get_signal+0x4e5/0x1470 kernel/signal.c:2348 do_signal+0x8f/0x1660 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x116/0x150 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457099 RSP: 002b:00007f36ad9decf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000009300a8 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000009300a8 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009300ac R13: 00007ffd626c004f R14: 00007f36ad9df9c0 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by getty/1760: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142 5 locks held by kworker/u4:14/8614: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x787/0x15c0 kernel/workqueue.c:2085 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x7bf/0x15c0 kernel/workqueue.c:2089 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x14c/0x880 net/core/net_namespace.c:449 #3: (rtnl_mutex){+.+.}, at: [] sit_exit_net+0x86/0x600 net/ipv6/sit.c:1866 #4: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:138 [inline] #4: (cpu_hotplug_lock.rw_sem){++++}, at: [] flush_all_backlogs net/core/dev.c:4631 [inline] #4: (cpu_hotplug_lock.rw_sem){++++}, at: [] rollback_registered_many+0x416/0xac0 net/core/dev.c:7168 1 lock held by syz-executor5/9562: #0: (rtnl_mutex){+.+.}, at: [] tun_detach drivers/net/tun.c:593 [inline] #0: (rtnl_mutex){+.+.}, at: [] tun_chr_close+0x33/0x50 drivers/net/tun.c:2662 3 locks held by kworker/1:4/19543: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x787/0x15c0 kernel/workqueue.c:2085 #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x7bf/0x15c0 kernel/workqueue.c:2089 #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4432 2 locks held by syz-executor5/20773: #0: (&sb->s_type->i_mutex_key#9){+.+.}, at: [] inode_lock include/linux/fs.h:713 [inline] #0: (&sb->s_type->i_mutex_key#9){+.+.}, at: [] __sock_release+0x84/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:699 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.68+ #4 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 23959 Comm: syz-executor7 Not tainted 4.14.68+ #4 task: ffff88019c1d9780 task.stack: ffff880183d50000 RIP: 0033:0x4023c4 RSP: 002b:00007f4359016690 EFLAGS: 00000286 RAX: 00000000d3e2f628 RBX: 0000000000000007 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 00007f43590166c0 RDI: 0000000000000007 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d7008 R14: 00000000004ca112 R15: 0000000000000000 FS: 00007f4359017700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000728010 CR3: 00000001d7336004 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600