Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout INFO: task syz-executor.5:9732 blocked for more than 140 seconds. Not tainted 4.14.264-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28880 9732 7991 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 kthread_stop+0xce/0x640 kernel/kthread.c:555 kvm_mmu_pre_destroy_vm+0x41/0x50 arch/x86/kvm/mmu.c:5912 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:769 [inline] kvm_put_kvm+0x30a/0xa90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:806 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:817 __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+0x46/0xbb RIP: 0033:0x7fa8c9d04c9b RSP: 002b:00007fff1c7e5430 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007fa8c9d04c9b RDX: 00007fa8c9e6a038 RSI: ffffffffffffffff RDI: 0000000000000005 RBP: 00007fa8c9e66960 R08: 0000000000000000 R09: 00007fa8c9e6a040 R10: 00007fff1c7e5530 R11: 0000000000000293 R12: 000000000000df57 R13: 00007fff1c7e5530 R14: 00007fa8c9e64f60 R15: 0000000000000032 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.264-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4625 Comm: systemd-journal Not tainted 4.14.264-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a12b6180 task.stack: ffff8880a12b8000 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1d/0x50 kernel/kcov.c:67 RSP: 0018:ffff8880a12bfbf0 EFLAGS: 00000246 RAX: ffff8880a12b6180 RBX: ffff8880a112c4c0 RCX: 000000007fff0000 RDX: 0000000000000000 RSI: ffffc90001ad4030 RDI: ffffffff878f06c8 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000007fff0000 R13: ffff8880a12bfe68 R14: ffff8880a12bfd08 R15: 000000007fff0000 FS: 00007f76b42738c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f76b1682000 CR3: 00000000a16f0000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seccomp_run_filters+0x12a/0x540 kernel/seccomp.c:210 __seccomp_filter+0x7e/0xd60 kernel/seccomp.c:671 __secure_computing+0xdd/0x3e0 kernel/seccomp.c:800 syscall_trace_enter+0x359/0xc20 arch/x86/entry/common.c:121 do_syscall_64+0x41b/0x640 arch/x86/entry/common.c:283 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f76b3802840 RSP: 002b:00007fff3f319648 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fff3f319950 RCX: 00007f76b3802840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055667cac02e0 RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055667cab3040 R14: 00007fff3f319910 R15: 000055667cac05e0 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 48 85 c0 74 1a 65 8b 15 cb 42 ad 7e 81 e2 00 01 1f 00 75 0b <8b> 90 58 13 00 00 83 fa 01 74 01 c3 48 8b 34 24 48 8b 88 60 13 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 65 48 8b 04 25 c0 7f mov %gs:0x27fc0,%rax 15: 02 00 17: 48 85 c0 test %rax,%rax 1a: 74 1a je 0x36 1c: 65 8b 15 cb 42 ad 7e mov %gs:0x7ead42cb(%rip),%edx # 0x7ead42ee 23: 81 e2 00 01 1f 00 and $0x1f0100,%edx 29: 75 0b jne 0x36 * 2b: 8b 90 58 13 00 00 mov 0x1358(%rax),%edx <-- trapping instruction 31: 83 fa 01 cmp $0x1,%edx 34: 74 01 je 0x37 36: c3 retq 37: 48 8b 34 24 mov (%rsp),%rsi 3b: 48 rex.W 3c: 8b .byte 0x8b 3d: 88 60 13 mov %ah,0x13(%rax)