Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout INFO: task syz-executor.4:11527 blocked for more than 140 seconds. Not tainted 4.14.198-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28288 11527 6397 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1731 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 flush_work+0x3fe/0x770 kernel/workqueue.c:2893 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2964 p9_conn_destroy net/9p/trans_fd.c:898 [inline] p9_fd_close+0x28d/0x420 net/9p/trans_fd.c:925 p9_client_create+0x736/0x12c0 net/9p/client.c:1095 v9fs_session_init+0x1c5/0x1540 fs/9p/v9fs.c:422 v9fs_mount+0x73/0x860 fs/9p/vfs_super.c:135 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45de59 RSP: 002b:00007fd04dbc1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000021780 RCX: 000000000045de59 RDX: 0000000020000080 RSI: 0000000020000300 RDI: 0000000000000000 RBP: 000000000118c018 R08: 0000000020000740 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4 R13: 00007ffcddcf91df R14: 00007fd04dbc29c0 R15: 000000000118bfd4 Showing all locks held in the system: 2 locks held by kworker/1:1/23: #0: ("events"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087 #1: ((&m->rq)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091 1 lock held by khungtaskd/1067: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1067 Comm: khungtaskd Not tainted 4.14.198-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+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f 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: 3654 Comm: systemd-journal Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888093df83c0 task.stack: ffff888093e00000 RIP: 0010:get_stack_pointer arch/x86/include/asm/stacktrace.h:82 [inline] RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:58 [inline] RIP: 0010:__save_stack_trace+0x152/0x160 arch/x86/kernel/stacktrace.c:43 RSP: 0018:ffff888093e07af8 EFLAGS: 00000046 RAX: ffff888093df83c0 RBX: ffff88809fd972e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888093df83c0 RDI: ffff888093e07b88 RBP: ffff888093e07b78 R08: 1ffff1101483c6f1 R09: ffffed1013fb2e58 R10: 0000000000000000 R11: ffff888093df83c0 R12: ffff888093e07b88 R13: 0000000000000000 R14: 00000000ffffff9c R15: 00005609b4e719a3 FS: 00007fa911eb88c0(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa90f3ad000 CR3: 000000009420f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 security_cred_free+0x71/0xb0 security/security.c:1003 put_cred_rcu+0xe3/0x300 kernel/cred.c:117 __put_cred+0x1a1/0x210 kernel/cred.c:151 put_cred include/linux/cred.h:271 [inline] SYSC_faccessat fs/open.c:444 [inline] SyS_faccessat+0x52a/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa9111749c7 RSP: 002b:00007ffebc8ca248 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffebc8cd270 RCX: 00007fa9111749c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005609b4e719a3 RBP: 00007ffebc8ca390 R08: 00005609b4e673e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00005609b5e668c0 R15: 00007ffebc8ca880 Code: 10 e9 26 ff ff ff 48 89 df 48 89 55 80 48 89 75 88 e8 b3 d7 1d 00 48 8b 75 88 85 c0 48 8b 55 80 0f 84 de fe ff ff e9 01 ff ff ff <48> 89 e9 e9 00 ff ff ff 66 0f 1f 44 00 00 31 c9 31 d2 65 48 8b