INFO: task syz-executor.0:5165 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-next-20231114-syzkaller-01346-g5ba73bec5e7b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27616 pid:5165 tgid:5164 ppid:5140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xede/0x5b00 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b4/0x9c0 kernel/locking/mutex.c:747
bdev_release+0xcd/0xa90 block/bdev.c:965
blkdev_release+0x37/0x50 block/fops.c:616
__fput+0x270/0xbb0 fs/file_table.c:394
task_work_run+0x14c/0x240 kernel/task_work.c:180
get_signal+0x105a/0x2770 kernel/signal.c:2678
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x4551e9
RSP: 002b:00007fd03db160d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 000000000054cf00 RCX: 00000000004551e9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00000000004a06fd R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049f8fd
R13: 000000000000000b R14: 000000000054cf00 R15: 00007ffcbd983738
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
5 locks held by kworker/u4:8/2415:
2 locks held by getty/4815:
#0: ffff88814b13c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc4/0x1490 drivers/tty/n_tty.c:2201
1 lock held by udevd/5129:
#0: ffff88801d4504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x27c/0xed0 block/bdev.c:855
1 lock held by syz-executor.0/5165:
#0: ffff88801d4504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0xcd/0xa90 block/bdev.c:965
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc1-next-20231114-syzkaller-01346-g5ba73bec5e7b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 77 Comm: kworker/u4:5 Not tainted 6.7.0-rc1-next-20231114-syzkaller-01346-g5ba73bec5e7b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:check_preemption_disabled+0x28/0xe0 lib/smp_processor_id.c:19
Code: 1f 00 41 54 55 53 48 83 ec 08 65 8b 1d 8d 3e 82 75 65 8b 05 82 3e 82 75 a9 ff ff ff 7f 74 0b 48 83 c4 08 89 d8 5b 5d 41 5c c3 <9c> 58 f6 c4 02 74 ee 65 48 8b 05 59 3e 82 75 f6 40 2f 04 48 89 fd
RSP: 0018:ffffc900015f7ae8 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8accc340 RDI: ffffffff8b2f14a0
RBP: 0000000000000246 R08: 0000000000000000 R09: fffffbfff1e31c6a
R10: ffffffff8f18e357 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8ce51f70 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005580f6823038 CR3: 000000000cd78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_acquire kernel/locking/lockdep.c:5752 [inline]
lock_acquire+0x172/0x530 kernel/locking/lockdep.c:5718
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
cpus_read_lock+0x42/0x160 kernel/cpu.c:489
static_key_disable+0x12/0x20 kernel/jump_label.c:242
toggle_allocation_gate mm/kfence/core.c:835 [inline]
toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:822
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2636
process_scheduled_works kernel/workqueue.c:2709 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2790
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242