INFO: task syz-executor405:5101 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc1-syzkaller-00317-ga693b9c95abd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor405 state:D stack:26048 pid:5101  tgid:5100  ppid:5097   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 bdev_release+0x184/0x700 block/bdev.c:1080
 blkdev_release+0x15/0x20 block/fops.c:623
 __fput+0x408/0x8b0 fs/file_table.c:422
 task_work_run+0x251/0x310 kernel/task_work.c:180
 ptrace_notify+0x2d2/0x380 kernel/signal.c:2402
 ptrace_report_syscall include/linux/ptrace.h:415 [inline]
 ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
 syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
 syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2187f834b9
RSP: 002b:00007f2187f3b228 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f218800a328 RCX: 00007f2187f834b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f218800a320 R08: 00007f2187f3b6c0 R09: 00007f2187f3b6c0
R10: 00007f2187f3b6c0 R11: 0000000000000246 R12: 00007f218800a32c
R13: 00007f2187fd71a4 R14: 64626e2f7665642f R15: 00007ffce2611518
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4848:
 #0: ffff88802ab9b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by udevd/5098:
 #0: ffff8880201854c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xe5/0xc60 block/bdev.c:897
1 lock held by syz-executor405/5101:
 #0: ffff8880201854c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x184/0x700 block/bdev.c:1080

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

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc1-syzkaller-00317-ga693b9c95abd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 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:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:379
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc1-syzkaller-00317-ga693b9c95abd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:prepare_task_switch kernel/sched/core.c:5210 [inline]
RIP: 0010:context_switch kernel/sched/core.c:5355 [inline]
RIP: 0010:__schedule+0x97a/0x4a20 kernel/sched/core.c:6745
Code: 04 00 0f 84 cf 10 00 00 48 8b 44 24 18 48 8d 98 f8 15 00 00 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 <84> c0 0f 85 06 12 00 00 80 4b 03 40 48 8b 44 24 10 4c 8d b8 60 0a
RSP: 0018:ffffc900001a7bc0 EFLAGS: 00000012
RAX: 0000000000000000 RBX: ffff8880176a95f8 RCX: ffffffff8b8f4818
RDX: 0000000000000000 RSI: ffffffff8c1ff220 RDI: ffffffff8c1ff1e0
RBP: ffffc900001a7da8 R08: ffffffff8fad456f R09: 1ffffffff1f5a8ad
R10: dffffc0000000000 R11: fffffbfff1f5a8ae R12: ffffc900001a7cc0
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88802b89bc00
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d34226d680 CR3: 000000007e110000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 schedule_idle+0x53/0x90 kernel/sched/core.c:6863
 do_idle+0x56a/0x5d0 kernel/sched/idle.c:360
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.443 msecs