INFO: task kworker/0:1:22 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:1 D27448 22 2 0x80000000 Workqueue: events linkwatch_event Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 linkwatch_event+0xa/0x50 net/core/link_watch.c:236 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 INFO: task kworker/u4:5:1883 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:5 D26704 1883 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 cleanup_net+0x13b/0x870 net/core/net_namespace.c:453 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 INFO: task syz-executor.2:7415 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27040 7415 5869 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline] _synchronize_rcu_expedited+0x68c/0x840 kernel/rcu/tree_exp.h:596 synchronize_net+0x2b/0x40 net/core/dev.c:8222 dev_deactivate_many+0x3cf/0x980 net/sched/sch_generic.c:935 __dev_close_many+0x10a/0x260 net/core/dev.c:1441 dev_close_many+0x215/0x600 net/core/dev.c:1479 rollback_registered_many+0x35b/0xab0 net/core/dev.c:7191 rollback_registered+0xe6/0x1a0 net/core/dev.c:7255 unregister_netdevice_queue net/core/dev.c:8248 [inline] unregister_netdevice_queue+0x1a1/0x220 net/core/dev.c:8241 unregister_netdevice include/linux/netdevice.h:2437 [inline] __tun_detach+0xa9d/0xcf0 drivers/net/tun.c:576 tun_detach drivers/net/tun.c:586 [inline] tun_chr_close+0x41/0x60 drivers/net/tun.c:2660 __fput+0x25e/0x710 fs/file_table.c:210 task_work_run+0x125/0x1a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:164 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: 0033:0x45a669 RSP: 002b:00007efe0d65ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000b RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007efe0d65b6d4 R13: 00000000004fb3f2 R14: 00000000004d36b8 R15: 00000000ffffffff INFO: task syz-executor.3:7414 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D26752 7414 1867 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb7/0x100 net/socket.c:656 ___sys_sendmsg+0x752/0x890 net/socket.c:2062 __sys_sendmsg+0xb6/0x150 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f2b885d4c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b885d56d4 R13: 00000000004c8bca R14: 00000000004df1d8 R15: 00000000ffffffff INFO: task syz-executor.3:7420 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28000 7420 1867 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb7/0x100 net/socket.c:656 ___sys_sendmsg+0x752/0x890 net/socket.c:2062 __sys_sendmsg+0xb6/0x150 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f2b885b3c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b885b46d4 R13: 00000000004c8bca R14: 00000000004df1d8 R15: 00000000ffffffff INFO: task syz-executor.5:7424 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28496 7424 4632 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb7/0x100 net/socket.c:656 sock_write_iter+0x20f/0x360 net/socket.c:925 call_write_iter include/linux/fs.h:1798 [inline] do_iter_readv_writev+0x379/0x580 fs/read_write.c:679 do_iter_write fs/read_write.c:958 [inline] do_iter_write+0x152/0x550 fs/read_write.c:939 vfs_writev+0x146/0x2d0 fs/read_write.c:1003 do_writev+0x10c/0x2e0 fs/read_write.c:1038 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f6f92e4cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f92e4d6d4 R13: 00000000004c7f1e R14: 00000000004e3798 R15: 00000000ffffffff INFO: task syz-executor.5:7427 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27552 7427 4632 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 sock_do_ioctl+0x92/0xb0 net/socket.c:981 sock_ioctl+0x253/0x440 net/socket.c:1071 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/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f6f92e2bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000006 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f92e2c6d4 R13: 00000000004c437e R14: 00000000004d8758 R15: 00000000ffffffff INFO: task syz-executor.5:7429 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27904 7429 4632 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb7/0x100 net/socket.c:656 sock_write_iter+0x20f/0x360 net/socket.c:925 call_write_iter include/linux/fs.h:1798 [inline] do_iter_readv_writev+0x379/0x580 fs/read_write.c:679 do_iter_write fs/read_write.c:958 [inline] do_iter_write+0x152/0x550 fs/read_write.c:939 vfs_writev+0x146/0x2d0 fs/read_write.c:1003 do_writev+0x10c/0x2e0 fs/read_write.c:1038 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f6f92e0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f92e0b6d4 R13: 00000000004c7f1e R14: 00000000004e3798 R15: 00000000ffffffff INFO: task syz-executor.5:7447 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27840 7447 4632 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb7/0x100 net/socket.c:656 sock_write_iter+0x20f/0x360 net/socket.c:925 call_write_iter include/linux/fs.h:1798 [inline] do_iter_readv_writev+0x379/0x580 fs/read_write.c:679 do_iter_write fs/read_write.c:958 [inline] do_iter_write+0x152/0x550 fs/read_write.c:939 vfs_writev+0x146/0x2d0 fs/read_write.c:1003 do_writev+0x10c/0x2e0 fs/read_write.c:1038 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f6f92de9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f92dea6d4 R13: 00000000004c7f1e R14: 00000000004e3798 R15: 00000000ffffffff INFO: task syz-executor.5:7448 blocked for more than 140 seconds. Not tainted 4.14.154+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28896 7448 4632 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3499 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 sock_do_ioctl+0x92/0xb0 net/socket.c:981 sock_ioctl+0x253/0x440 net/socket.c:1071 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/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a669 RSP: 002b:00007f6f92dc8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000006 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f92dc96d4 R13: 00000000004c437e R14: 00000000004d8758 R15: 00000000ffffffff Showing all locks held in the system: 3 locks held by kworker/0:1/22: #0: ("events"){+.+.}, at: [<00000000b561233c>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: ((linkwatch_work).work){+.+.}, at: [<000000004a726725>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 #2: (rtnl_mutex){+.+.}, at: [<0000000044881ced>] linkwatch_event+0xa/0x50 net/core/link_watch.c:236 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<0000000011ffcf5e>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544 2 locks held by getty/1775: #0: (&tty->ldisc_sem){++++}, at: [<000000009338604f>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b6d12ff8>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 4 locks held by kworker/u4:5/1883: #0: ("%s""netns"){+.+.}, at: [<00000000b561233c>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: (net_cleanup_work){+.+.}, at: [<000000004a726725>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 #2: (net_mutex){+.+.}, at: [<00000000516ac193>] cleanup_net+0x136/0x870 net/core/net_namespace.c:450 #3: (rtnl_mutex){+.+.}, at: [<0000000078a9195d>] cleanup_net+0x13b/0x870 net/core/net_namespace.c:453 3 locks held by kworker/0:3/3790: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [<00000000b561233c>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: ((addr_chk_work).work){+.+.}, at: [<000000004a726725>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 #2: (rtnl_mutex){+.+.}, at: [<0000000010b8958b>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431 1 lock held by syz-executor.2/7415: #0: (rtnl_mutex){+.+.}, at: [<00000000fbc03f2d>] tun_detach drivers/net/tun.c:585 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000fbc03f2d>] tun_chr_close+0x34/0x60 drivers/net/tun.c:2660 1 lock held by syz-executor.3/7414: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.3/7420: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.5/7424: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.5/7427: #0: (rtnl_mutex){+.+.}, at: [<000000003a11a788>] dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.5/7429: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.5/7447: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.5/7448: #0: (rtnl_mutex){+.+.}, at: [<000000003a11a788>] dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 2 locks held by syz-executor.4/7431: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<0000000017627c2c>] inode_lock include/linux/fs.h:724 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<0000000017627c2c>] __sock_release+0x86/0x2c0 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [<000000000af149c9>] raw_close+0xe/0x30 net/ipv4/raw.c:699 2 locks held by syz-executor.4/7432: #0: (sk_lock-AF_PACKET){+.+.}, at: [<0000000084e18ef2>] lock_sock include/net/sock.h:1462 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [<0000000084e18ef2>] packet_setsockopt+0xe19/0x27a0 net/packet/af_packet.c:3700 #1: (rtnl_mutex){+.+.}, at: [<000000001da2d87b>] prb_calc_retire_blk_tmo net/packet/af_packet.c:576 [inline] #1: (rtnl_mutex){+.+.}, at: [<000000001da2d87b>] init_prb_bdqc net/packet/af_packet.c:639 [inline] #1: (rtnl_mutex){+.+.}, at: [<000000001da2d87b>] packet_set_ring+0x133d/0x17d0 net/packet/af_packet.c:4356 1 lock held by syz-executor.1/7453: #0: (rtnl_mutex){+.+.}, at: [<000000003a11a788>] dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.1/7454: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 1 lock held by syz-executor.1/7456: #0: (rtnl_mutex){+.+.}, at: [<000000003a11a788>] dev_ioctl+0x531/0xdf0 net/core/dev_ioctl.c:421 1 lock held by syz-executor.1/7457: #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [<00000000b9a17f74>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.154+ #0 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xe5/0x154 lib/dump_stack.c:58 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 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff98aa68f3