INFO: task syz.1.708:5547 blocked for more than 430 seconds. Not tainted 6.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.708 state:D stack:0 pid:5547 tgid:5546 ppid:3311 task_flags:0x400140 flags:0x00400011 Call trace: __switch_to+0x208/0x4f4 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0xd34/0x3184 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6878 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:747 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:799 bdev_release+0x104/0x510 block/bdev.c:1128 blkdev_release+0x14/0x24 block/fops.c:684 __fput+0x2c8/0x954 fs/file_table.c:465 ____fput+0x14/0x20 fs/file_table.c:493 task_work_run+0x128/0x210 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x1dc/0x264 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc_compat+0xfc/0x17c arch/arm64/kernel/entry-common.c:912 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:921 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605 INFO: task syz.1.708:5549 blocked for more than 430 seconds. Not tainted 6.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.708 state:D stack:0 pid:5549 tgid:5546 ppid:3311 task_flags:0x400040 flags:0x00400001 Call trace: __switch_to+0x208/0x4f4 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5396 [inline] __schedule+0xd34/0x3184 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6878 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:747 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:799 bdev_open+0x2c4/0xa84 block/bdev.c:945 blkdev_open+0x1d8/0x31c block/fops.c:676 do_dentry_open+0x6f8/0x153c fs/open.c:964 vfs_open+0x5c/0x2fc fs/open.c:1094 do_open fs/namei.c:3887 [inline] path_openat+0x148c/0x24b0 fs/namei.c:4046 do_filp_open+0x184/0x360 fs/namei.c:4073 do_sys_openat2+0xe0/0x160 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_compat_sys_openat fs/open.c:1514 [inline] __se_compat_sys_openat fs/open.c:1512 [inline] __arm64_compat_sys_openat+0x128/0x1b8 fs/open.c:1512 __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:911 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:921 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605 Showing all locks held in the system: 4 locks held by kworker/u8:1/27: 1 lock held by khungtaskd/32: #0: ffff8000873405e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6764 2 locks held by kworker/u8:8/1582: 2 locks held by getty/3250: #0: ffff000016e020a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d5db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdc0 drivers/tty/n_tty.c:2222 1 lock held by udevd/5394: #0: ffff000014c34358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945 1 lock held by syz.1.708/5547: #0: ffff000014c34358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x104/0x510 block/bdev.c:1128 1 lock held by syz.1.708/5549: #0: ffff000014c34358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945 1 lock held by syz.2.1367/7490: #0: ffff000014c34358 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0xe4/0x2a0 block/bdev.c:1288 1 lock held by syz.2.1367/7491: #0: ffff000014c34358 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0xe4/0x2a0 block/bdev.c:1288 =============================================