INFO: task udevd:3528 blocked for more than 430 seconds. Not tainted 6.8.0-syzkaller-g1f440397665f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:3528 tgid:3528 ppid:2974 flags:0x0000000d Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5409 [inline] __schedule+0xad8/0x2ae8 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6828 io_schedule+0xac/0x114 kernel/sched/core.c:9034 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:85 [inline] blkdev_flush_mapping+0xfc/0x24c block/bdev.c:644 blkdev_put_whole+0xd4/0xf0 block/bdev.c:675 bdev_release+0x378/0x7d4 block/bdev.c:1044 blkdev_release+0x14/0x24 block/fops.c:628 __fput+0x1a4/0x92c fs/file_table.c:423 ____fput+0x10/0x1c fs/file_table.c:451 task_work_run+0x124/0x20c kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x754/0x2000 kernel/exit.c:878 do_group_exit+0xa4/0x208 kernel/exit.c:1027 get_signal+0x199c/0x1ae0 kernel/signal.c:2907 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 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffff800086838ce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x2d4 kernel/locking/lockdep.c:6608 2 locks held by syslogd/2959: #0: ffff00006a892198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:559 [inline] #0: ffff00006a892198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1385 [inline] #0: ffff00006a892198 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1699 [inline] #0: ffff00006a892198 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x268/0x2ae8 kernel/sched/core.c:6652 #1: ffff00006a87dcc8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x258/0x74c kernel/sched/psi.c:988 1 lock held by klogd/2963: 2 locks held by getty/3092: #0: ffff000013e6f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008960b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2201 1 lock held by udevd/3528: #0: ffff0000105944c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0xf8/0x7d4 block/bdev.c:1028 1 lock held by syz-executor.0/3623: #0: ffff0000105944c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2b0/0xa28 block/bdev.c:862 1 lock held by syz-executor.0/3697: #0: ffff0000105944c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2b0/0xa28 block/bdev.c:862 1 lock held by syz-executor.0/3769: #0: ffff0000105944c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2b0/0xa28 block/bdev.c:862 =============================================