Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout INFO: task syz-executor.5:10235 blocked for more than 140 seconds. Not tainted 4.14.262-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28816 10235 7990 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 request_wait_answer+0x30d/0x620 fs/fuse/dev.c:478 __fuse_request_send+0x108/0x1a0 fs/fuse/dev.c:498 fuse_request_send fs/fuse/dev.c:511 [inline] fuse_simple_request+0x2fa/0x790 fs/fuse/dev.c:569 fuse_send_open+0x170/0x1c0 fs/fuse/file.c:43 fuse_do_open+0x25d/0x460 fs/fuse/file.c:134 fuse_open_common+0x12a/0x250 fs/fuse/file.c:218 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f070b0beeb9 RSP: 002b:00007f0709a34168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f070b1d1f60 RCX: 00007f070b0beeb9 RDX: 0000000000080101 RSI: 000000002000c380 RDI: ffffffffffffff9c RBP: 00007f070b11908d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda0aa899f R14: 00007f0709a34300 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 1 CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.262-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: 7965 Comm: syz-fuzzer Not tainted 4.14.262-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809798a180 task.stack: ffff888095f78000 RIP: 0010:trace_hardirqs_off+0x0/0x10 kernel/locking/lockdep.c:2975 RSP: 0018:ffff888095f7fd50 EFLAGS: 00000086 RAX: 1ffffffff11e127a RBX: 00000000000522c0 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff88f83720 RDI: ffffffff8c002148 RBP: ffffffff8c002148 R08: ffffffff8b9c2a48 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 R13: ffffffff88f83720 R14: ffff888095f7fde8 R15: ffffffff8c002148 FS: 000000c00002e090(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1054a43028 CR3: 00000000b06c1000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:160 debug_object_free lib/debugobjects.c:598 [inline] debug_object_free+0x52/0x320 lib/debugobjects.c:586 destroy_hrtimer_on_stack kernel/time/hrtimer.c:427 [inline] hrtimer_nanosleep+0x1ff/0x4b0 kernel/time/hrtimer.c:1552 SYSC_nanosleep kernel/time/hrtimer.c:1569 [inline] SyS_nanosleep+0x116/0x170 kernel/time/hrtimer.c:1556 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x46db9d RSP: 002b:000000c00003df18 EFLAGS: 00000202 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 000000000046db9d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000c00003df18 RBP: 000000c00003df28 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000000043b6e0 R13: 0000000000000000 R14: 00000000008de168 R15: 0000000000000000 Code: f0 88 e8 54 e3 3d 00 e9 5d fe ff ff 48 c7 c7 00 fa fa 8b e8 d3 e2 3d 00 e9 79 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 8b 3c 24 e9 47 fd ff ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: e8 54 e3 3d 00 callq 0x3de359 5: e9 5d fe ff ff jmpq 0xfffffe67 a: 48 c7 c7 00 fa fa 8b mov $0xffffffff8bfafa00,%rdi 11: e8 d3 e2 3d 00 callq 0x3de2e9 16: e9 79 ff ff ff jmpq 0xffffff94 1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 22: 00 00 00 00 26: 0f 1f 00 nopl (%rax) * 29: 48 8b 3c 24 mov (%rsp),%rdi <-- trapping instruction 2d: e9 47 fd ff ff jmpq 0xfffffd79 32: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 39: 48 rex.W 3a: b8 .byte 0xb8 3b: 00 00 add %al,(%rax)