ip6_tunnel: l0 xmit: Local address not yet configured! INFO: task kworker/u4:23:7567 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:23 D26352 7567 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 _synchronize_rcu_expedited+0x5ab/0x850 kernel/rcu/tree_exp.h:615 synchronize_net+0x2b/0x40 net/core/dev.c:8217 dev_deactivate_many+0x3cf/0x980 net/sched/sch_generic.c:931 __dev_close_many+0x10a/0x260 net/core/dev.c:1441 INFO: task syz-executor.1:8512 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29712 8512 1846 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 sock_do_ioctl+0x92/0xb0 net/socket.c:980 sock_ioctl+0x253/0x440 net/socket.c:1070 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.1:8562 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D30064 8562 1846 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.1:8569 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29952 8569 1846 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 sock_do_ioctl+0x92/0xb0 net/socket.c:980 sock_ioctl+0x253/0x440 net/socket.c:1070 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.4:8518 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29024 8518 1854 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006 INFO: task syz-executor.4:8528 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29776 8528 1854 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645 ip_setsockopt+0x36/0x90 net/ipv4/ip_sockglue.c:1248 tcp_setsockopt net/ipv4/tcp.c:2805 [inline] tcp_setsockopt+0x81/0xc0 net/ipv4/tcp.c:2799 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x12b/0x210 net/socket.c:1843 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.4:8533 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29024 8533 1854 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006 INFO: task syz-executor.4:8565 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29776 8565 1854 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645 ip_setsockopt+0x36/0x90 net/ipv4/ip_sockglue.c:1248 tcp_setsockopt net/ipv4/tcp.c:2805 [inline] tcp_setsockopt+0x81/0xc0 net/ipv4/tcp.c:2799 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x12b/0x210 net/socket.c:1843 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.3:8560 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27104 8560 1860 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678 inet6_ioctl+0xff/0x1b0 net/ipv6/af_inet6.c:554 sock_do_ioctl+0x65/0xb0 net/socket.c:973 sock_ioctl+0x253/0x440 net/socket.c:1070 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.3:8579 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D30064 8579 1860 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966 inet6_ioctl+0x114/0x1b0 net/ipv6/af_inet6.c:557 sock_do_ioctl+0x65/0xb0 net/socket.c:973 sock_ioctl+0x253/0x440 net/socket.c:1070 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1759: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.0/3165: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.0/3189: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by udevd/3701: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 2 locks held by syz-executor.5/4353: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1456 [inline] #1: (sk_lock-AF_PACKET){+.+.}, at: [] packet_release+0x4c9/0xb80 net/packet/af_packet.c:3036 2 locks held by syz-executor.5/5598: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x375/0x850 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.0/5912: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 3 locks held by kworker/0:4/5967: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431 2 locks held by syz-executor.3/6126: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 #1: (&ep->mtx){+.+.}, at: [] ep_free+0xd9/0x220 fs/eventpoll.c:859 2 locks held by syz-executor.3/7130: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:699 5 locks held by kworker/u4:23/7567: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x136/0x860 net/core/net_namespace.c:449 #3: (rtnl_mutex){+.+.}, at: [] ip6_tnl_exit_net+0x71/0x550 net/ipv6/ip6_tunnel.c:2265 #4: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #4: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x307/0x850 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.5/7794: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.0/12859: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.5/13291: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.5/13603: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.5/13613: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.5/15185: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.0/15434: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.3/16140: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 1 lock held by syz-executor.4/16427: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.3/18223: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 1 lock held by syz-executor.0/18235: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 2 locks held by kworker/u4:31/19722: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 2 locks held by syz-executor.4/20495: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:699 2 locks held by syz-executor.3/24503: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1456 [inline] #1: (sk_lock-AF_PACKET){+.+.}, at: [] packet_release+0x4c9/0xb80 net/packet/af_packet.c:3036 1 lock held by syz-executor.3/28445: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.0/28524: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 2 locks held by syz-executor.3/30012: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:699 1 lock held by udevd/740: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 1 lock held by syz-executor.1/931: #0: (epmutex){+.+.}, at: [] ep_free+0x6d/0x220 fs/eventpoll.c:839 1 lock held by syz-executor.5/1601: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.2/1824: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.5/2121: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 1 lock held by syz-executor.1/5237: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 2 locks held by syz-executor.4/6734: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:699 1 lock held by syz-executor.1/8512: #0: (rtnl_mutex){+.+.}, at: [] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.1/8562: #0: (rtnl_mutex){+.+.}, at: [] __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309 1 lock held by syz-executor.1/8569: #0: (rtnl_mutex){+.+.}, at: [] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.4/8518: #0: (rtnl_mutex){+.+.}, at: [] devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006 1 lock held by syz-executor.4/8528: #0: (rtnl_mutex){+.+.}, at: [] do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645 1 lock held by syz-executor.4/8533: #0: (rtnl_mutex){+.+.}, at: [] devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006 1 lock held by syz-executor.4/8565: #0: (rtnl_mutex){+.+.}, at: [] do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645 1 lock held by syz-executor.3/8560: #0: (rtnl_mutex){+.+.}, at: [] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678 1 lock held by syz-executor.3/8579: #0: (rtnl_mutex){+.+.}, at: [] addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966 1 lock held by syz-executor.3/8581: #0: (rtnl_mutex){+.+.}, at: [] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678 1 lock held by syz-executor.3/8586: #0: (rtnl_mutex){+.+.}, at: [] addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966 1 lock held by syz-executor.3/8587: #0: (rtnl_mutex){+.+.}, at: [] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678 1 lock held by syz-executor.3/8590: #0: (rtnl_mutex){+.+.}, at: [] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678 1 lock held by syz-executor.3/8592: #0: (rtnl_mutex){+.+.}, at: [] __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309 1 lock held by syz-executor.5/8561: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.5/8578: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.0/8583: #0: (rtnl_mutex){+.+.}, at: [] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.0/8585: #0: (rtnl_mutex){+.+.}, at: [] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.2/8596: #0: (rtnl_mutex){+.+.}, at: [] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.105+ #29 Workqueue: events rtc_timer_do_work task: ffff8881d66ac680 task.stack: ffff8881d66c8000 RIP: 0010:__lock_release kernel/locking/lockdep.c:3760 [inline] RIP: 0010:lock_release+0x1de/0x730 kernel/locking/lockdep.c:4010 RSP: 0018:ffff8881d66cf9a8 EFLAGS: 00000002 RAX: 0000000000000004 RBX: 1ffff1103acd9f38 RCX: ffff8881d66cf9e0 RDX: 0000000000000004 RSI: 1ffffffff4b58485 RDI: ffff8881d66aceac RBP: ffffffffa720a5a0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000246 R11: 0000000000000001 R12: ffff8881d1f36b88 R13: ffff8881d66ac680 R14: 0000000000000004 R15: ffff8881d66acea8 FS: 0000000000000000(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9ffa3700 CR3: 0000000209226006 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4e 04 00 00 44 89 f0 0b 05 c0 bd 80 03 0f 84 49 03 00 00 48 8d 4c 24 38 44 89 f2 <4c> 89 e6 4c 89 ef e8 57 6a ff ff 48 85 c0 48 89 c1 0f 84 15 03