Bluetooth: hci11 command 0x041b tx timeout Bluetooth: hci10 command 0x040f tx timeout Bluetooth: hci11 command 0x040f tx timeout Bluetooth: hci10 command 0x0419 tx timeout Bluetooth: hci11 command 0x0419 tx timeout BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 239s! INFO: task kworker/1:0:18 blocked for more than 140 seconds. Showing busy workqueues and worker pools: workqueue events: flags=0x0 Not tainted 4.14.305-syzkaller #0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. in-flight: 18:key_garbage_collector kworker/1:0 D pwq 0: 27216 18 2 0x80000000 cpus=0 Workqueue: events key_garbage_collector node=0 flags=0x0 nice=0 active=24/256 refcnt=25 in-flight: 3:rtc_timer_do_work pending: wait_rcu_exp_gp, vmstat_shepherd , cache_reap, macvlan_process_broadcast Call Trace: , macvlan_process_broadcast, defense_work_handler, defense_work_handler context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 , defense_work_handler , defense_work_handler, defense_work_handler, defense_work_handler, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, rht_deferred_worker, free_obj_work , hci_cmd_timeout, hci_cmd_timeout schedule+0x8d/0x1b0 kernel/sched/core.c:3430 , l2cap_info_timeout exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline] _synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596 , l2cap_info_timeout , rfkill_any_led_trigger_worker, bpf_prog_free_deferred workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: gc_worker workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=7 in-flight: 742:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 8932:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn workqueue events_power_efficient: flags=0x80 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 refcnt=5 pending: process_srcu, do_cache_clean, fb_flashcursor, neigh_periodic_work workqueue mm_percpu_wq: flags=0x8 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: vmstat_update workqueue netns: flags=0xe000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=4 in-flight: 9245:cleanup_net workqueue dm_bufio_cache: flags=0x8 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: work_fn workqueue ipv6_addrconf: flags=0x40008 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 in-flight: 3625:addrconf_verify_work pool 0: cpus=0 key_garbage_collector+0x2af/0x7c0 security/keys/gc.c:292 node=0 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 flags=0x0 nice=0 hung=239s workers=5 idle: 7998 4315 9180 24 pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=5 idle: 9153 23 8607 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 34 2904 22 5 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task kworker/u4:3:742 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:3 D26880 742 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xed/0x2e0 fs/notify/mark.c:757 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task syz-executor.1:7983 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25336 7983 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline] _synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 namespace_unlock fs/namespace.c:1448 [inline] do_umount fs/namespace.c:1650 [inline] SYSC_umount fs/namespace.c:1754 [inline] SyS_umount+0x791/0xeb0 fs/namespace.c:1723 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f4edbf14567 RSP: 002b:00007ffd3e75fd08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4edbf14567 RDX: 00007ffd3e75fdda RSI: 000000000000000a RDI: 00007ffd3e75fdd0 RBP: 00007ffd3e75fdd0 R08: 00000000ffffffff R09: 00007ffd3e75fba0 R10: 0000555556f07903 R11: 0000000000000246 R12: 00007f4edbf6db24 R13: 00007ffd3e760e90 R14: 0000555556f07810 R15: 00007ffd3e760ed0 INFO: task syz-executor.2:7990 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D25632 7990 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 namespace_unlock fs/namespace.c:1448 [inline] do_umount fs/namespace.c:1650 [inline] SYSC_umount fs/namespace.c:1754 [inline] SyS_umount+0x791/0xeb0 fs/namespace.c:1723 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fb3761f2567 RSP: 002b:00007ffe307528a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb3761f2567 RDX: 00007ffe3075297a RSI: 000000000000000a RDI: 00007ffe30752970 RBP: 00007ffe30752970 R08: 00000000ffffffff R09: 00007ffe30752740 R10: 0000555556acf903 R11: 0000000000000246 R12: 00007fb37624bb24 R13: 00007ffe30753a30 R14: 0000555556acf810 R15: 00007ffe30753a70 INFO: task kworker/u4:5:8932 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:5 D28992 8932 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task kworker/u4:6:9245 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:6 D27904 9245 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 netdev_wait_allrefs net/core/dev.c:7853 [inline] netdev_run_todo+0x79d/0xad0 net/core/dev.c:7947 ip6gre_exit_net+0x423/0x570 net/ipv6/ip6_gre.c:1212 ops_exit_list+0xad/0x160 net/core/net_namespace.c:142 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:487 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task syz-executor.4:10551 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28912 10551 8012 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 _synchronize_rcu_expedited+0x522/0x770 kernel/rcu/tree_exp.h:615 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 pfkey_release+0x20e/0x2b0 net/key/af_key.c:193 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 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+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f344133ffab RSP: 002b:00007ffce9cc2fa0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f344133ffab RDX: 00007f3440f02108 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f34414af980 R08: 0000000000000000 R09: 00007f3440f02000 R10: 00007f3440f02110 R11: 0000000000000293 R12: 000000000002e1ad R13: 00007ffce9cc30a0 R14: 00007f34414adf80 R15: 0000000000000032 INFO: task syz-executor.0:10584 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27192 10584 7982 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnl_newlink+0x7e1/0x1830 net/core/rtnetlink.c:2682 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fbdd52490f9 RSP: 002b:00007fbdd3779168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbdd5369120 RCX: 00007fbdd52490f9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00007fbdd52a4ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3e6bfd6f R14: 00007fbdd3779300 R15: 0000000000022000 INFO: task syz-executor.0:10586 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28680 10586 7982 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline] _synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596 synchronize_net+0x2b/0x40 net/core/dev.c:8248 dev_deactivate_many+0x3d9/0x970 net/sched/sch_generic.c:936 __dev_close_many+0x11d/0x270 net/core/dev.c:1437 dev_close_many+0x205/0x5f0 net/core/dev.c:1475 rollback_registered_many+0x399/0xbb0 net/core/dev.c:7189 rollback_registered+0xca/0x170 net/core/dev.c:7253 unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274 unregister_vlan_dev+0x25a/0x490 net/8021q/vlan.c:107 vlan_ioctl_handler+0x26e/0xcb0 net/8021q/vlan.c:593 sock_ioctl+0x32c/0x4c0 net/socket.c:1049 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fbdd52490f9 RSP: 002b:00007fbdd3758168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbdd53691f0 RCX: 00007fbdd52490f9 RDX: 0000000020000000 RSI: 0000000000008982 RDI: 0000000000000007 RBP: 00007fbdd52a4ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3e6bfd6f R14: 00007fbdd3758300 R15: 0000000000022000 INFO: task syz-executor.3:10590 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28312 10590 8006 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 exp_funnel_lock kernel/rcu/tree_exp.h:295 [inline] _synchronize_rcu_expedited+0x5f6/0x770 kernel/rcu/tree_exp.h:596 bdi_remove_from_list mm/backing-dev.c:935 [inline] bdi_unregister+0x144/0x610 mm/backing-dev.c:941 release_bdi mm/backing-dev.c:970 [inline] kref_put include/linux/kref.h:70 [inline] bdi_put+0x127/0x160 mm/backing-dev.c:979 generic_shutdown_super+0x2aa/0x370 fs/super.c:460 kill_anon_super+0x36/0x90 fs/super.c:1006 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 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+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f55d533962a RSP: 002b:00007f55d38a9f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffec RBX: 0000000000000000 RCX: 00007f55d533962a RDX: 0000000020000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007f55d38aa020 R08: 00007f55d38aa020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000080 R14: 00007f55d38a9fe0 R15: 0000000020000380 Showing all locks held in the system: 2 locks held by kworker/1:0/18: #0: ("events"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (key_gc_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 2 locks held by kworker/u4:3/742: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 3 locks held by kworker/1:2/3625: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4421 1 lock held by syz-executor.2/7990: #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596 2 locks held by kworker/u4:5/8932: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (connector_reaper_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 4 locks held by kworker/u4:6/9245: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x110/0x840 net/core/net_namespace.c:453 #3: (rtnl_mutex){+.+.}, at: [] netdev_wait_allrefs net/core/dev.c:7853 [inline] #3: (rtnl_mutex){+.+.}, at: [] netdev_run_todo+0x79d/0xad0 net/core/dev.c:7947 2 locks held by syz-executor.4/10551: #0: (&sb->s_type->i_mutex_key#13){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #0: (&sb->s_type->i_mutex_key#13){+.+.}, at: [] __sock_release+0x86/0x2b0 net/socket.c:601 #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x2c2/0x770 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.0/10584: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnl_newlink+0x7e1/0x1830 net/core/rtnetlink.c:2682 2 locks held by syz-executor.0/10586: #0: (vlan_ioctl_mutex){+.+.}, at: [] sock_ioctl+0x313/0x4c0 net/socket.c:1047 #1: (rtnl_mutex){+.+.}, at: [] vlan_ioctl_handler+0x9a/0xcb0 net/8021q/vlan.c:518 1 lock held by syz-executor.4/10607: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 1 lock held by syz-executor.0/10618: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 1 lock held by syz-executor.4/10629: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 1 lock held by syz-executor.0/10640: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 1 lock held by syz-executor.4/10651: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 1 lock held by syz-executor.0/10662: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 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+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Workqueue: events rtc_timer_do_work task: ffff8880b5fd60c0 task.stack: ffff8880b5fe0000 RIP: 0010:mark_lock+0x2f/0x1050 kernel/locking/lockdep.c:3161 RSP: 0018:ffff8880b5fe7b18 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 1ffff11016bfad2d RSI: ffff8880b5fd6948 RDI: ffff8880b5fd60c0 RBP: 0000000000000003 R08: ffffffff8b9c1d78 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: ffff8880b5fd60c0 R14: ffff8880b5fd6968 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8141382000 CR3: 00000000a22db000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2854 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2875 [inline] trace_hardirqs_on_caller+0x288/0x580 kernel/locking/lockdep.c:2930 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:192 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] rtc_handle_legacy_irq+0x7a/0x180 drivers/rtc/interface.c:515 rtc_timer_do_work+0x220/0x590 drivers/rtc/interface.c:881 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Code: 00 00 00 fc ff df 41 57 89 d1 41 89 d7 41 56 4c 8d 76 20 4c 89 f2 41 55 49 89 fd 41 54 48 c1 ea 03 41 bc 01 00 00 00 55 41 d3 e4 <48> 89 f5 53 48 83 ec 18 0f b6 04 02 84 c0 74 08 3c 01 0f 8e d6 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: df 41 57 filds 0x57(%rcx) 3: 89 d1 mov %edx,%ecx 5: 41 89 d7 mov %edx,%r15d 8: 41 56 push %r14 a: 4c 8d 76 20 lea 0x20(%rsi),%r14 e: 4c 89 f2 mov %r14,%rdx 11: 41 55 push %r13 13: 49 89 fd mov %rdi,%r13 16: 41 54 push %r12 18: 48 c1 ea 03 shr $0x3,%rdx 1c: 41 bc 01 00 00 00 mov $0x1,%r12d 22: 55 push %rbp 23: 41 d3 e4 shl %cl,%r12d * 26: 48 89 f5 mov %rsi,%rbp <-- trapping instruction 29: 53 push %rbx 2a: 48 83 ec 18 sub $0x18,%rsp 2e: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 32: 84 c0 test %al,%al 34: 74 08 je 0x3e 36: 3c 01 cmp $0x1,%al 38: 0f .byte 0xf 39: 8e d6 mov %esi,%ss