INFO: task udevd:3530 blocked for more than 430 seconds. Not tainted 6.8.0-rc5-syzkaller-g9fc1ccccfd8d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:3530 tgid:3530 ppid:2976 flags:0x0000000d Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0xad8/0x2ae8 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xd0/0x24c kernel/sched/core.c:6817 io_schedule+0xac/0x114 kernel/sched/core.c:9023 folio_wait_bit_common+0x2ac/0x6dc mm/filemap.c:1274 __folio_lock mm/filemap.c:1612 [inline] folio_lock include/linux/pagemap.h:1048 [inline] folio_lock include/linux/pagemap.h:1044 [inline] __filemap_get_folio+0x358/0x794 mm/filemap.c:1865 truncate_inode_pages_range+0x270/0xa7c mm/truncate.c:367 truncate_inode_pages+0x14/0x20 mm/truncate.c:439 kill_bdev block/bdev.c:79 [inline] blkdev_flush_mapping+0xfc/0x24c block/bdev.c:638 blkdev_put_whole+0xd4/0xf0 block/bdev.c:669 bdev_release+0x30c/0x778 block/bdev.c:985 blkdev_release+0x2c/0x4c block/fops.c:631 __fput+0x1a4/0x92c fs/file_table.c:376 ____fput+0x10/0x1c fs/file_table.c:404 task_work_run+0x124/0x20c kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x754/0x1f50 kernel/exit.c:871 do_group_exit+0xa4/0x208 kernel/exit.c:1020 get_signal+0x199c/0x1ae0 kernel/signal.c:2893 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x47c/0x3208 arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x11c/0x140 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.0:3627 blocked for more than 430 seconds. Not tainted 6.8.0-rc5-syzkaller-g9fc1ccccfd8d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:3627 tgid:3626 ppid:3557 flags:0x00000005 Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0xad8/0x2ae8 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xd0/0x24c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __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_by_dev+0x190/0xa20 block/bdev.c:859 blkdev_open+0xcc/0x29c block/fops.c:615 do_dentry_open+0x4e8/0x128c fs/open.c:953 vfs_open+0x90/0xc8 fs/open.c:1087 do_open fs/namei.c:3641 [inline] path_openat+0x1480/0x20b4 fs/namei.c:3798 do_filp_open+0x16c/0x330 fs/namei.c:3825 do_sys_openat2+0x12c/0x160 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __arm64_sys_openat+0x12c/0x1b8 fs/open.c:1430 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x140 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff8000867e7300 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x2d4 kernel/locking/lockdep.c:6608 2 locks held by klogd/2965: 2 locks held by getty/3096: #0: ffff00001481a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000895ab2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2201 1 lock held by udevd/3530: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0xac/0x778 block/bdev.c:969 1 lock held by syz-executor.0/3627: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x190/0xa20 block/bdev.c:859 1 lock held by syz-executor.0/3697: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x190/0xa20 block/bdev.c:859 1 lock held by syz-executor.0/3772: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x190/0xa20 block/bdev.c:859 1 lock held by syz-executor.0/3842: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x190/0xa20 block/bdev.c:859 1 lock held by syz-executor.0/3911: #0: ffff0000109c04c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x190/0xa20 block/bdev.c:859 =============================================