INFO: task kworker/u5:1:25915 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:1 state:D stack:28352 pid:25915 ppid: 2 flags:0x00004000
Workqueue: hci6 hci_power_on
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0x957/0xec0 kernel/sched/core.c:6428
schedule+0xeb/0x1b0 kernel/sched/core.c:6500
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6559
__mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
hci_dev_do_open net/bluetooth/hci_core.c:480 [inline]
hci_power_on+0x178/0x650 net/bluetooth/hci_core.c:963
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
INFO: task syz-executor.5:25930 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:26488 pid:25930 ppid: 3649 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0x957/0xec0 kernel/sched/core.c:6428
schedule+0xeb/0x1b0 kernel/sched/core.c:6500
schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
__flush_work kernel/workqueue.c:3075 [inline]
__cancel_work_timer+0x585/0x740 kernel/workqueue.c:3162
hci_dev_close_sync+0x31/0xcc0 net/bluetooth/hci_sync.c:4091
hci_dev_do_close net/bluetooth/hci_core.c:553 [inline]
hci_unregister_dev+0x1b1/0x460 net/bluetooth/hci_core.c:2685
hci_uart_tty_close+0x1a7/0x280 drivers/bluetooth/hci_ldisc.c:548
tty_ldisc_kill drivers/tty/tty_ldisc.c:608 [inline]
tty_ldisc_hangup+0x432/0x610 drivers/tty/tty_ldisc.c:724
__tty_hangup+0x494/0x6d0 drivers/tty/tty_io.c:637
tty_vhangup drivers/tty/tty_io.c:707 [inline]
tty_ioctl+0x606/0xc60 drivers/tty/tty_io.c:2718
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f9a03e89109
RSP: 002b:00007f9a04fec168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9a03f9bf60 RCX: 00007f9a03e89109
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007f9a03ee30ad R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd954d6b1f R14: 00007f9a04fec300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cb1ebe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3292:
#0: ffff88814a4a2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124
3 locks held by kworker/u5:1/25915:
#0: ffff888020a14938 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc90004a17d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffff888073d45048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:480 [inline]
#2: ffff888073d45048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x178/0x650 net/bluetooth/hci_core.c:963
3 locks held by syz-executor.5/25930:
#0: ffff8880409e31c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup+0xc3/0x6d0 drivers/tty/tty_io.c:597
#1: ffff8880409e3098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline]
#1: ffff8880409e3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock+0x6a/0xb0 drivers/tty/tty_ldisc.c:314
#2: ffff888073d45048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:551 [inline]
#2: ffff888073d45048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x1a9/0x460 net/bluetooth/hci_core.c:2685
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xd18/0xd60 kernel/hung_task.c:378
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2963 Comm: syslogd Not tainted 5.19.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x42/0x120 lib/smp_processor_id.c:55
Code: 08 65 8b 1d 30 30 d7 75 65 8b 05 a1 85 d7 75 a9 ff ff ff 7f 74 22 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 cc 00 00 00 <89> d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 48 c7 04 24 00 00 00 00
RSP: 0018:ffffc90002d4fde0 EFLAGS: 00000046
RAX: f14b1cd5e49bfc00 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8a8d32a0 RDI: ffffffff8ae98a60
RBP: 0000000000000000 R08: ffffffff81e88e27 R09: ffffed10289e00fa
R10: ffffed10289e00fa R11: 1ffff110289e00f9 R12: 0000000000000246
R13: ffff88807e543b00 R14: 00000000ffffffff R15: ffffffff8cb1eb60
FS: 00007fe33512b800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00f2c3000 CR3: 000000007f31b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:466 [inline]
lock_is_held_type+0x10a/0x190 kernel/locking/lockdep.c:5709
lock_is_held include/linux/lockdep.h:279 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_sys_exit+0x2d/0xd0 include/trace/events/syscalls.h:44
syscall_exit_work+0x4a/0xe0 kernel/entry/common.c:245
syscall_exit_to_user_mode_prepare+0x62/0x80 kernel/entry/common.c:276
__syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline]
syscall_exit_to_user_mode+0xa/0x60 kernel/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fe3352b78fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffe4c2cb008 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: 0000000000000052 RBX: 0000000000000002 RCX: 00007fe3352b78fe
RDX: 00000000000000ff RSI: 0000556524fdd950 RDI: 0000000000000000
RBP: 0000556524fdd910 R08: 00007fe335347040 R09: 00007fe3353470c0
R10: 00007fe335346fc0 R11: 0000000000000246 R12: 0000556524fdd997
R13: 0000556524fdd950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 08 65 8b or %ah,-0x75(%rbp)
3: 1d 30 30 d7 75 sbb $0x75d73030,%eax
8: 65 8b 05 a1 85 d7 75 mov %gs:0x75d785a1(%rip),%eax # 0x75d785b0
f: a9 ff ff ff 7f test $0x7fffffff,%eax
14: 74 22 je 0x38
16: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
1d: 00 00
1f: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
24: 0f 85 cc 00 00 00 jne 0xf6
* 2a: 89 d8 mov %ebx,%eax <-- trapping instruction
2c: 48 83 c4 10 add $0x10,%rsp
30: 5b pop %rbx
31: 41 5c pop %r12
33: 41 5e pop %r14
35: 41 5f pop %r15
37: c3 retq
38: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
3f: 00