syzbot

INFO: task udevd:3160 blocked for more than 450 seconds.
      Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:0     pid:3160  tgid:3160  ppid:2959   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:1031 [inline]
 folio_lock include/linux/pagemap.h:1027 [inline]
 __filemap_get_folio+0x35c/0x798 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+0x754/0x1f54 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:595
INFO: task syz-executor346:3167 blocked for more than 450 seconds.
      Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor346 state:D stack:0     pid:3167  tgid:3166  ppid:3156   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:595
INFO: lockdep is turned off.