Bluetooth: hci0: command 0x0406 tx timeout
INFO: task syz-executor.0:8734 blocked for more than 140 seconds.
Not tainted 4.19.163-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27992 8734 8137 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common+0x29c/0x470 kernel/sched/completion.c:115
__flush_work+0x4bb/0x8b0 kernel/workqueue.c:2928
__cancel_work_timer+0x412/0x590 kernel/workqueue.c:3015
p9_conn_destroy net/9p/trans_fd.c:904 [inline]
p9_fd_close+0x305/0x520 net/9p/trans_fd.c:934
p9_client_create+0x901/0x12e0 net/9p/client.c:1084
v9fs_session_init+0x1dd/0x1770 fs/9p/v9fs.c:421
v9fs_mount+0x73/0x910 fs/9p/vfs_super.c:135
mount_fs+0xa3/0x30c fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2469 [inline]
do_mount+0x113c/0x2f10 fs/namespace.c:2799
ksys_mount+0xcf/0x130 fs/namespace.c:3015
__do_sys_mount fs/namespace.c:3029 [inline]
__se_sys_mount fs/namespace.c:3026 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3026
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45e149
Code: 8d 15 4b da 21 01 48 8b 1c ca 83 3d 70 73 24 01 00 75 27 48 89 58 28 48 8b 44 24 20 48 89 04 ca 48 8d 05 22 da 21 01 48 89 04 <24> e8 91 c4 fa ff 48 8b 6c 24 28 48 83 c4 30 c3 48 8d 78 28 48 89
RSP: 002b:00007f15cac7ac68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e149
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 000000000119c1c8 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c184
R13: 00007ffc3790f57f R14: 00007f15cac7b9c0 R15: 000000000119c184
Showing all locks held in the system:
1 lock held by khungtaskd/1567:
#0: 000000001d2bbbcc (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440
2 locks held by kworker/1:3/4712:
#0: 0000000058fc6d81 ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2126
#1: 0000000027fd2b49 ((work_completion)(&m->wq)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2130
1 lock held by in:imklog/7794:
#0: 0000000099f141cd (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1567 Comm: khungtaskd Not tainted 4.19.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4690 Comm: systemd-journal Not tainted 4.19.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100
Code: 00 6e 88 4c 89 25 cc 39 bf 0b 41 bc f4 ff ff ff e8 a0 f9 ea ff 48 c7 05 b6 39 bf 0b 00 00 00 00 e9 39 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 80 df 01 00 65 8b 15 ec 0e 9d 7e 81 e2 00 01 1f 00
RSP: 0018:ffff8880a0d8fc40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff816a0737
RDX: 0000000000000000 RSI: ffffffff816a0740 RDI: 0000000000000005
RBP: ffff88813be83e40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000286
R13: ffff88813be83e40 R14: ffff88809fb00380 R15: ffff8880a0d8fd50
FS: 00007f16b7df28c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16b51d6008 CR3: 00000000a0dbb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_off+0x50/0x200 kernel/trace/trace_preemptirq.c:40
kmem_cache_free+0x56/0x260 mm/slab.c:3761
putname+0xe1/0x120 fs/namei.c:261
filename_lookup+0x3d0/0x5a0 fs/namei.c:2358
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x248/0x7a0 fs/open.c:397
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f16b70ae9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007fff09079298 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007fff0907c2c0 RCX: 00007f16b70ae9c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055590ecfd9a3
RBP: 00007fff090793e0 R08: 000055590ecf33e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055590fa128a0 R15: 00007fff090798d0