Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout INFO: task syz-executor.5:7985 blocked for more than 140 seconds. Not tainted 4.14.225-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D25608 7985 1 0x80000006 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 _rcu_barrier+0x56/0x3b0 kernel/rcu/tree.c:3546 netdev_run_todo+0xf9/0xad0 net/core/dev.c:7919 tun_detach drivers/net/tun.c:587 [inline] tun_chr_close+0x46/0x60 drivers/net/tun.c:2679 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xa44/0x2850 kernel/exit.c:868 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2423 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x160/0x200 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+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x419554 RSP: 002b:00007ffe5e27a500 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: 0000000000000003 RBX: 00007ffe5e27a610 RCX: 0000000000419554 RDX: 0000000000000002 RSI: 00007ffe5e27a650 RDI: 00000000ffffff9c RBP: 00007ffe5e27a650 R08: 0000000000000000 R09: 00007ffe5e27a410 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 000000000002d377 R14: 0000000000000000 R15: 00007ffe5e27a650 INFO: task syz-executor.4:9531 blocked for more than 140 seconds. Not tainted 4.14.225-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29344 9531 7983 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 sock_ioctl+0x313/0x4c0 net/socket.c:1047 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+0x46/0xbb RIP: 0033:0x465f69 RSP: 002b:00007f0065463188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465f69 RDX: 0000000020000380 RSI: 0000000000008982 RDI: 0000000000000005 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffe389593df R14: 00007f0065463300 R15: 0000000000022000 INFO: task syz-executor.4:9532 blocked for more than 140 seconds. Not tainted 4.14.225-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27488 9532 7983 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 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 _rcu_barrier+0x24f/0x3b0 kernel/rcu/tree.c:3611 netdev_run_todo+0xf9/0xad0 net/core/dev.c:7919 vlan_ioctl_handler+0x150/0xcb0 net/8021q/vlan.c:618 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+0x46/0xbb RIP: 0033:0x465f69 RSP: 002b:00007f0065442188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465f69 RDX: 0000000020000380 RSI: 0000000000008982 RDI: 0000000000000005 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffe389593df R14: 00007f0065442300 R15: 0000000000022000 Showing all locks held in the system: 4 locks held by kworker/u4:0/5: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x110/0x840 net/core/net_namespace.c:450 #3: (rcu_preempt_state.barrier_mutex){+.+.}, at: [] _rcu_barrier+0x56/0x3b0 kernel/rcu/tree.c:3546 1 lock held by khungtaskd/1526: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.5/7985: #0: (rcu_preempt_state.barrier_mutex){+.+.}, at: [] _rcu_barrier+0x56/0x3b0 kernel/rcu/tree.c:3546 1 lock held by syz-executor.4/9531: #0: (vlan_ioctl_mutex){+.+.}, at: [] sock_ioctl+0x313/0x4c0 net/socket.c:1047 2 locks held by syz-executor.4/9532: #0: (vlan_ioctl_mutex){+.+.}, at: [] sock_ioctl+0x313/0x4c0 net/socket.c:1047 #1: (rcu_preempt_state.barrier_mutex){+.+.}, at: [] _rcu_barrier+0x56/0x3b0 kernel/rcu/tree.c:3546 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1526 Comm: khungtaskd Not tainted 4.14.225-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9521 Comm: syz-executor.3 Not tainted 4.14.225-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809ad04040 task.stack: ffff8880423f8000 RIP: 0010:general_protection+0x0/0x50 arch/x86/entry/entry_64.S:1115 RSP: 0000:fffffe0000033fd0 EFLAGS: 00000002 RAX: 0000000000000002 RBX: 0000000000000000 RCX: 000000000003ffff RDX: 0000000000000008 RSI: 0000000000000008 RDI: 00007fcb3bb8115c RBP: 00007fcb3bb81170 R08: 00007fff7bf96000 R09: 00000000004bfa8f R10: 001af1d216f34c56 R11: 0000000000000001 R12: 00007fff7bf95080 R13: 0000000000014edc R14: 00007fcb3bb81300 R15: 0000000000022000 FS: 00007fcb3bb81700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcb3bb80f80 CR3: 000000009f0f9000 CR4: 00000000001406e4 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0033:0x7fff7bf9893e RSP: 002b:00007fcb3bb81148 EFLAGS: 00010202 Code: e9 c6 02 00 00 e8 f1 01 00 00 48 89 e7 48 8b 74 24 78 48 c7 44 24 78 ff ff ff ff e8 5b 3b db f9 e9 a6 02 00 00 66 0f 1f 44 00 00 <0f> 1f 00 f6 44 24 10 03 75 20 e8 c1 01 00 00 48 89 e7 48 8b 74