INFO: task kworker/u5:1:17665 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller-00060-g30306f6194ca #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:1 state:D stack:25008 pid:17665 ppid: 2 flags:0x00004000
Workqueue: hci7 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.3:4470 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller-00060-g30306f6194ca #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26584 pid: 4470 ppid: 3640 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: 0033:0x7f281e089109
RSP: 002b:00007f281f197168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f281e19bf60 RCX: 00007f281e089109
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007f281e0e305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe91d516f R14: 00007f281f197300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by pr/ttyS0/16:
1 lock held by khungtaskd/29:
#0: ffffffff8cb1eca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:3/52:
2 locks held by getty/3290:
#0: ffff888027174098 (&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/u5:1/17665:
#0: ffff888017c0f938 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc900164f7d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffff88803dab1048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:480 [inline]
#2: ffff88803dab1048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x178/0x650 net/bluetooth/hci_core.c:963
3 locks held by syz-executor.3/4470:
#0: ffff888079bbc1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup+0xc3/0x6d0 drivers/tty/tty_io.c:597
#1: ffff888079bbc098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline]
#1: ffff888079bbc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock+0x6a/0xb0 drivers/tty/tty_ldisc.c:314
#2: ffff88803dab1048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:551 [inline]
#2: ffff88803dab1048 (&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-00060-g30306f6194ca #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: 16 Comm: pr/ttyS0 Not tainted 5.19.0-rc2-syzkaller-00060-g30306f6194ca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_serial_in+0x71/0xb0 drivers/tty/serial/8250/8250_port.c:460
Code: f5 93 d6 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 66 7e 29 fd 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 89 e9 80 e1 07 38 c1 7c ad 48 89 ef
RSP: 0018:ffffc90000157958 EFLAGS: 00000002
RAX: 1ffffffff2319700 RBX: ffffffff918cb9e0 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff84b11291 R09: ffffed1028dc0047
R10: ffffed1028dc0047 R11: 1ffff11028dc0046 R12: 0000000000000000
R13: ffff888140160820 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce256f3d88 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:118 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2085 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3354 [inline]
serial8250_console_write+0x10d1/0x16d0 drivers/tty/serial/8250/8250_port.c:3436
call_console_driver kernel/printk/printk.c:2075 [inline]
__console_emit_next_record+0x82c/0xb30 kernel/printk/printk.c:2916
console_emit_next_record kernel/printk/printk.c:3721 [inline]
printk_kthread_func+0x9d8/0xd20 kernel/printk/printk.c:3837
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess), 3 bytes skipped:
0: fc cld
1: 89 e9 mov %ebp,%ecx
3: 41 d3 e6 shl %cl,%r14d
6: 48 83 c3 40 add $0x40,%rbx
a: 48 89 d8 mov %rbx,%rax
d: 48 c1 e8 03 shr $0x3,%rax
11: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
16: 74 08 je 0x20
18: 48 89 df mov %rbx,%rdi
1b: e8 66 7e 29 fd callq 0xfd297e86
20: 44 03 33 add (%rbx),%r14d
23: 44 89 f2 mov %r14d,%edx
26: ec in (%dx),%al
* 27: 0f b6 c0 movzbl %al,%eax <-- trapping instruction
2a: 5b pop %rbx
2b: 41 5e pop %r14
2d: 41 5f pop %r15
2f: 5d pop %rbp
30: c3 retq
31: 89 e9 mov %ebp,%ecx
33: 80 e1 07 and $0x7,%cl
36: 38 c1 cmp %al,%cl
38: 7c ad jl 0xffffffe7
3a: 48 89 ef mov %rbp,%rdi