Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout INFO: task syz-executor.0:10084 blocked for more than 140 seconds. Not tainted 4.14.279-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27704 10084 7999 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 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 usb_start_wait_urb+0x125/0x440 drivers/usb/core/message.c:61 usb_bulk_msg+0x1f6/0x500 drivers/usb/core/message.c:252 proc_bulk+0x331/0x6d0 drivers/usb/core/devio.c:1223 usbdev_do_ioctl+0x5b0/0x2b70 drivers/usb/core/devio.c:2449 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2599 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: 0033:0x7ff4fd59f0e9 RSP: 002b:00007ff4fbf14168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff4fd6b1f60 RCX: 00007ff4fd59f0e9 RDX: 0000000020000200 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007ff4fd5f908d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9d90e01f R14: 00007ff4fbf14300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1532: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.279-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: 7804 Comm: kworker/1:3 Not tainted 4.14.279-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_long gc_worker task: ffff88809d276240 task.stack: ffff88809c5b0000 RIP: 0010:debug_lockdep_rcu_enabled+0x63/0xe0 kernel/rcu/update.c:299 RSP: 0018:ffff88809c5b7cd0 EFLAGS: 00000297 RAX: 0000000000000003 RBX: 0000000000013afb RCX: 1ffffffff127a500 RDX: 0000000000000004 RSI: 0000000000000002 RDI: 0000000000000297 RBP: 1ffffffff11e1312 R08: ffffffff8b9bd750 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88823554ebe8 R14: 0000000000010000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f13dbc96000 CR3: 00000000a29b9000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:681 [inline] gc_worker+0x5d5/0xb50 net/netfilter/nf_conntrack_core.c:1128 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:404 Code: 79 48 c7 c0 00 28 3d 89 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 64 <8b> 0d f7 05 f7 07 85 c9 74 45 65 48 8b 1c 25 c0 7f 02 00 48 8d ---------------- Code disassembly (best guess): 0: 79 48 jns 0x4a 2: c7 c0 00 28 3d 89 mov $0x893d2800,%eax 8: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx f: fc ff df 12: 48 89 c1 mov %rax,%rcx 15: 83 e0 07 and $0x7,%eax 18: 48 c1 e9 03 shr $0x3,%rcx 1c: 83 c0 03 add $0x3,%eax 1f: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx 23: 38 d0 cmp %dl,%al 25: 7c 04 jl 0x2b 27: 84 d2 test %dl,%dl 29: 75 64 jne 0x8f * 2b: 8b 0d f7 05 f7 07 mov 0x7f705f7(%rip),%ecx # 0x7f70628 <-- trapping instruction 31: 85 c9 test %ecx,%ecx 33: 74 45 je 0x7a 35: 65 48 8b 1c 25 c0 7f mov %gs:0x27fc0,%rbx 3c: 02 00 3e: 48 rex.W 3f: 8d .byte 0x8d