Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout INFO: task syz-executor.2:8028 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D25176 8028 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 blkdev_get+0x88/0x890 fs/block_dev.c:1611 blkdev_open+0x1cc/0x250 fs/block_dev.c:1772 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:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 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+0x5e/0xd3 RIP: 0033:0x7fbd38f23284 RSP: 002b:00007fff82e235c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fff82e236c0 RCX: 00007fbd38f23284 RDX: 0000000000000002 RSI: 00007fff82e23700 RDI: 00000000ffffff9c RBP: 00007fff82e23700 R08: 0000000000000000 R09: 00007fff82e234d0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 000000000003cd06 R14: 0000000000000001 R15: 00007fff82e23700 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 syz-executor.2/8028: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 fs/block_dev.c:1455 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9611 Comm: systemd-udevd Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 task: ffff888097d6e1c0 task.stack: ffff888059b90000 RIP: 0010:radix_tree_next_chunk+0x209/0x8c0 lib/radix-tree.c:1767 RSP: 0018:ffff888059b97970 EFLAGS: 00000287 RAX: ffff888097d6e1c0 RBX: 0000000000000022 RCX: 0000000000000036 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888059b97a78 RBP: ffff88805cd5d168 R08: 0000000000000000 R09: 0000000000020011 R10: ffff888097d6ea70 R11: ffff888097d6e1c0 R12: ffff88805cd5d140 R13: dffffc0000000000 R14: ffff88805cd5d278 R15: 0000000000000000 FS: 00007f9e8ba258c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdd2107f000 CR3: 000000009a48f000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_get_entries+0x4c4/0x870 mm/filemap.c:1560 pagevec_lookup_entries+0x35/0x70 mm/swap.c:933 truncate_inode_pages_range+0x1ac/0x13e0 mm/truncate.c:292 kill_bdev fs/block_dev.c:98 [inline] __blkdev_put+0x24c/0x800 fs/block_dev.c:1797 blkdev_close+0x86/0xb0 fs/block_dev.c:1875 __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+0x5e/0xd3 RIP: 0033:0x7f9e8ab6b270 RSP: 002b:00007ffc2e541988 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f9e8ab6b270 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007f9e8ba25710 R08: 000055979162bdf0 R09: 000055979162bb00 R10: 00007f9e8ba258c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00005597916256e0 R14: 0000000000000003 R15: 000000000000000e Code: 24 40 20 0f 85 a1 00 00 00 e8 44 15 56 fa 49 8d 5e 01 48 83 fb 3f 0f 87 6b 05 00 00 e8 31 15 56 fa 49 8d 6c 24 28 4f 8d 74 f4 30 22 15 56 fa 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 0f 85 84 05