Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout INFO: task syz-executor.5:7419 blocked for more than 140 seconds. Not tainted 4.19.163-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27752 7419 5932 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6f6/0xd20 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x3fb/0x5d0 kernel/sched/completion.c:115 wait_for_completion_timeout+0xe/0x10 kernel/sched/completion.c:155 usb_start_wait_urb+0x12f/0x280 drivers/usb/core/message.c:62 usb_bulk_msg+0x1d4/0x610 drivers/usb/core/message.c:253 proc_bulk+0x4e5/0x630 drivers/usb/core/devio.c:1206 usbdev_do_ioctl+0x1191/0x28d0 drivers/usb/core/devio.c:2430 usbdev_ioctl+0x9/0x10 drivers/usb/core/devio.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f12b77fec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000001aa80 RCX: 000000000045d5b9 RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffe7532922f R14: 00007f12b77ff9c0 R15: 000000000118cf4c Showing all locks held in the system: 1 lock held by khungtaskd/1091: #0: 0000000004be2113 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4442 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1091 Comm: khungtaskd Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x22a lib/dump_stack.c:118 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf5/0x119 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x5c3/0xb40 kernel/hung_task.c:287 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10 Comm: rcu_preempt Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:806 [inline] RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] RIP: 0010:_raw_spin_lock_irqsave+0x22/0xd0 kernel/locking/spinlock.c:152 Code: fa 48 8b 5d f8 58 c9 c3 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 54 53 48 89 fb 48 c7 c7 80 fa 51 88 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 85 00 00 00 48 83 3d ec ac 77 01 00 74 77 9c 58 RSP: 0018:ffff8881f56dfba8 EFLAGS: 00000a06 RAX: dffffc0000000000 RBX: ffffffff889a22e0 RCX: 0000000000000000 RDX: 1ffffffff10a3f50 RSI: 0000000000000001 RDI: ffffffff8851fa80 RBP: ffff8881f56dfbb8 R08: fffffbfff1466f82 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a337c08 R13: ffffffff8a337c00 R14: ffff8881eea60508 R15: ffff8881f6823a40 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77875e5000 CR3: 000000000846d006 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __free_object+0x1a/0x1f0 lib/debugobjects.c:251 free_object lib/debugobjects.c:272 [inline] debug_object_free+0x235/0x3e0 lib/debugobjects.c:652 destroy_timer_on_stack kernel/time/timer.c:753 [inline] schedule_timeout+0x3af/0xd20 kernel/time/timer.c:1822 rcu_gp_kthread+0xd2b/0x23e0 kernel/rcu/tree.c:2202 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415