INFO: task syz.0.6177:20378 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.6177      state:D stack:0     pid:20378 tgid:20373 ppid:3278   flags:0x00400001
Call trace:
 __switch_to+0x200/0x364 arch/arm64/kernel/process.c:606
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0xafc/0x2dcc kernel/sched/core.c:6693
 __schedule_loop kernel/sched/core.c:6770 [inline]
 schedule+0xd0/0x304 kernel/sched/core.c:6785
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6842
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:752
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:804
 bdev_open+0x2c4/0xa84 block/bdev.c:904
 blkdev_open+0x24c/0x378 block/fops.c:631
 do_dentry_open+0x4fc/0x1028 fs/open.c:958
 vfs_open+0x5c/0x2fc fs/open.c:1088
 do_open fs/namei.c:3774 [inline]
 path_openat+0x14fc/0x2588 fs/namei.c:3933
 do_filp_open+0x16c/0x330 fs/namei.c:3960
 do_sys_openat2+0x12c/0x160 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_compat_sys_openat fs/open.c:1492 [inline]
 __se_compat_sys_openat fs/open.c:1490 [inline]
 __arm64_compat_sys_openat+0x128/0x1b4 fs/open.c:1490
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
 do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:157
 el0_svc_compat+0x4c/0x17c arch/arm64/kernel/entry-common.c:852
 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:862
 el0t_32_sync+0x194/0x198 arch/arm64/kernel/entry.S:603

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffff800086df5460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x48/0x340 kernel/locking/lockdep.c:6714
1 lock held by klogd/3088:
2 locks held by getty/3218:
 #0: ffff000017a710a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80008ce9b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2211
1 lock held by sshd/3271:
1 lock held by udevd/20366:
 #0: ffff000013ebd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa84 block/bdev.c:904
1 lock held by syz.0.6177/20375:
 #0: ffff000013ebd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x104/0x510 block/bdev.c:1087
1 lock held by syz.0.6177/20378:
 #0: ffff000013ebd4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa84 block/bdev.c:904

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