INFO: task syz-executor270:5176 blocked for more than 143 seconds.
      Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor270 state:D stack:26224 pid:5176  tgid:5175  ppid:5097   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6738
 __schedule_loop kernel/sched/core.c:6815 [inline]
 schedule+0x14a/0x320 kernel/sched/core.c:6830
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752
 bdev_release+0x1cb/0xa20 block/bdev.c:1028
 blkdev_release+0x15/0x20 block/fops.c:628
 __fput+0x42b/0x8a0 fs/file_table.c:423
 task_work_run+0x250/0x310 kernel/task_work.c:180
 get_signal+0x1672/0x1850 kernel/signal.c:2683
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0xc8/0x360 kernel/entry/common.c:212
 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7eff251414b9
RSP: 002b:00007eff250ff218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007eff251c8328 RCX: 00007eff251414b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005
RBP: 00007eff251c8320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007eff251c832c
R13: 00007eff251951a4 R14: 64626e2f7665642f R15: 00000000ffffff43
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4819:
 #0: ffff888029eb00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900037c32f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by udevd/5098:
 #0: ffff88801fb664c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862
1 lock held by syz-executor270/5176:
 #0: ffff88801fb664c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x1cb/0xa20 block/bdev.c:1028

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <TASK>
 __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+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u8:1 Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:bcmp+0x9/0x1e0 lib/string.c:697
Code: 41 5d 41 5e 41 5f 5d e9 85 ff 11 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 50 49 89 d6 49 89 f7 49 89 fc 48 ba 00 00 00 00 00
RSP: 0018:ffffc900001078c0 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffffffff8ba57748 RCX: dffffc0000000000
RDX: 0000000000000005 RSI: ffffffff92671900 RDI: ffffffff81ea67b5
RBP: ffffc90000107a10 R08: ffffffff81337451 R09: ffffffff81337316
R10: 0000000000000002 R11: ffff888016ea3c00 R12: 0000000000000000
R13: ffffffff92671900 R14: ffffffff92671900 R15: ffffffff8ba576aa
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e92d123680 CR3: 000000000df32000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __jump_label_patch+0x2a8/0x490 arch/x86/kernel/jump_label.c:65
 arch_jump_label_transform_queue+0x68/0x100 arch/x86/kernel/jump_label.c:137
 __jump_label_update+0x177/0x3a0 kernel/jump_label.c:475
 static_key_disable_cpuslocked+0xce/0x1c0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:831
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa01/0x1770 kernel/workqueue.c:3335
 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416
 kthread+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.661 msecs