INFO: task syz-executor.1:8822 blocked for more than 143 seconds.
Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24632 pid:8822 tgid:8822 ppid:5111 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17df/0x4a40 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6804 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6819
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
drain_workqueue+0xc9/0x390 kernel/workqueue.c:3730
destroy_workqueue+0xba/0xc40 kernel/workqueue.c:5319
hci_release_dev+0x136/0x1670 net/bluetooth/hci_core.c:2807
bt_host_release+0x83/0x90 net/bluetooth/hci_sysfs.c:94
device_release+0x99/0x1c0
kobject_cleanup lib/kobject.c:682 [inline]
kobject_release lib/kobject.c:716 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f5/0x430 lib/kobject.c:733
hci_uart_tty_close+0x1c1/0x290 drivers/bluetooth/hci_ldisc.c:552
tty_ldisc_kill+0xa3/0x1a0 drivers/tty/tty_ldisc.c:607
tty_ldisc_release+0x174/0x200 drivers/tty/tty_ldisc.c:775
tty_release_struct+0x2b/0xe0 drivers/tty/tty_io.c:1696
tty_release+0xd0c/0x12c0 drivers/tty/tty_io.c:1867
__fput+0x429/0x8a0 fs/file_table.c:376
__do_sys_close fs/open.c:1554 [inline]
__se_sys_close fs/open.c:1539 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1539
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f8321e7cc9a
RSP: 002b:00007fff04cf51c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f8321e7cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b32b20000 R09: 0000000000000466
R10: 000000008135fff4 R11: 0000000000000293 R12: 00007f8321a00178
R13: ffffffffffffffff R14: 00007f8321a00000 R15: 0000000000058dfa
Showing all locks held in the system:
2 locks held by kworker/u4:0/10:
#0: ffff8880b943c758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:567
#1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
1 lock held by khungtaskd/29:
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:4/60:
1 lock held by udevd/4521:
2 locks held by getty/4828:
#0: ffff888029e870a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.1/8822:
#0: ffff88805d9b00a0 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:289 [inline]
#0: ffff88805d9b00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair_timeout drivers/tty/tty_ldisc.c:352 [inline]
#0: ffff88805d9b00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock_pair drivers/tty/tty_ldisc.c:366 [inline]
#0: ffff88805d9b00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_release+0x110/0x200 drivers/tty/tty_ldisc.c:774
3 locks held by syz-executor.4/12469:
2 locks held by syz-executor.4/12471:
#0: ffff88801d8ea420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x61/0x200 fs/namespace.c:453
#1: ffff888079d51800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff888079d51800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: lock_two_nondirectories+0xe1/0x170 fs/inode.c:1110
1 lock held by syz-executor.1/12485:
2 locks held by syz-executor.1/12487:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112