Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout INFO: task syz-executor.1:32257 blocked for more than 140 seconds. Not tainted 4.14.276-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28912 32257 8043 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:781 [inline] kvm_put_kvm+0x30a/0xab0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:830 __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: 0033:0x7fcf9ee0ed2b RSP: 002b:00007ffe15e592a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007fcf9ee0ed2b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000000a RBP: 00007fcf9ef70960 R08: 0000000000000000 R09: 00007fcf9ef73760 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000020e37 R13: 00007fcf9ef739a8 R14: 00007fcf9ef6f100 R15: 0000000000000002 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 1 lock held by in:imklog/7716: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:819 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.276-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: 7717 Comm: rs:main Q:Reg Not tainted 4.14.276-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a5894500 task.stack: ffff888092200000 RIP: 0010:queue_lock kernel/futex.c:2343 [inline] RIP: 0010:futex_wait_setup+0xf9/0x260 kernel/futex.c:2792 RSP: 0018:ffff8880922079f0 EFLAGS: 00000202 RAX: ffffc90000c74a00 RBX: ffff888092207af0 RCX: 000000002d6afbba RDX: 00000000000001ff RSI: 0000000000000000 RDI: 0000000000000200 RBP: ffffed1012440f5e R08: 0000000000000000 R09: 0000000000000000 R10: 1ffff11012440ff9 R11: 0000000000000000 R12: 000055d4f822c28c R13: ffff888092207a48 R14: ffff888092207bb8 R15: ffffc90000c74a00 FS: 00007f4c92199700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdebb56f010 CR3: 00000000ab1c2000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: futex_wait+0x199/0x5a0 kernel/futex.c:2850 do_futex+0x1d8/0x1570 kernel/futex.c:3906 SYSC_futex kernel/futex.c:3966 [inline] SyS_futex+0x1da/0x290 kernel/futex.c:3934 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f4c94bda17f RSP: 002b:00007f4c92198c70 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4c94bda17f RDX: 00000000000004af RSI: 0000000000000080 RDI: 000055d4f822c28c RBP: 000055d4f822c288 R08: 000055d4f822c000 R09: 0000000000000257 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4c92198cd0 R13: 0000000000000000 R14: 000055d4f7fd3290 R15: 0000000000000000 Code: c1 ed 03 48 01 c5 eb 10 e8 45 3b 09 00 f6 44 24 14 01 0f 85 27 01 00 00 e8 35 3b 09 00 4c 89 f7 e8 4d bf ff ff 49 89 c7 f0 ff 00 <4c> 8d 40 08 48 8b 44 24 08 80 38 00 0f 85 14 01 00 00 48 8b 04 ---------------- Code disassembly (best guess): 0: c1 ed 03 shr $0x3,%ebp 3: 48 01 c5 add %rax,%rbp 6: eb 10 jmp 0x18 8: e8 45 3b 09 00 callq 0x93b52 d: f6 44 24 14 01 testb $0x1,0x14(%rsp) 12: 0f 85 27 01 00 00 jne 0x13f 18: e8 35 3b 09 00 callq 0x93b52 1d: 4c 89 f7 mov %r14,%rdi 20: e8 4d bf ff ff callq 0xffffbf72 25: 49 89 c7 mov %rax,%r15 28: f0 ff 00 lock incl (%rax) * 2b: 4c 8d 40 08 lea 0x8(%rax),%r8 <-- trapping instruction 2f: 48 8b 44 24 08 mov 0x8(%rsp),%rax 34: 80 38 00 cmpb $0x0,(%rax) 37: 0f 85 14 01 00 00 jne 0x151 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 04 .byte 0x4