INFO: task udevd:4731 blocked in I/O wait
INFO: task udevd:4731 blocked in I/O wait for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:0     pid:4731  tgid:4731  ppid:4339   task_flags:0x400140 flags:0x00800411
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7270
 __schedule_loop kernel/sched/core.c:7347 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7362
 io_schedule+0x1c/0xe0 kernel/sched/core.c:8190
 folio_wait_bit_common+0x6b8/0xa30 mm/filemap.c:1329
 folio_put_wait_locked mm/filemap.c:1498 [inline]
 do_read_cache_folio+0x23c/0x5a8 mm/filemap.c:4138
 read_cache_folio+0x68/0x88 mm/filemap.c:4188
 read_mapping_folio include/linux/pagemap.h:1015 [inline]
 read_part_sector+0xcc/0x708 block/partitions/core.c:724
 adfspart_check_POWERTEC+0x94/0x5b8 block/partitions/acorn.c:451
 check_partition block/partitions/core.c:143 [inline]
 blk_add_partitions block/partitions/core.c:591 [inline]
 bdev_disk_changed+0x6e4/0x1224 block/partitions/core.c:695
 blkdev_get_whole+0x15c/0x240 block/bdev.c:793
 bdev_open+0x2b4/0x880 block/bdev.c:1002
 blkdev_open+0x2d4/0x408 block/fops.c:674
 do_dentry_open+0x5c4/0xfc0 fs/open.c:996
 vfs_open+0x44/0x2dc fs/open.c:1101
 do_open fs/namei.c:4837 [inline]
 path_openat+0x1084/0x18f4 fs/namei.c:5000
 do_file_open+0x1c8/0x2e8 fs/namei.c:5029
 do_sys_openat2+0x114/0x1e8 fs/open.c:1417
 do_sys_open+0xb0/0xe0 fs/open.c:1423
 __do_sys_openat fs/open.c:1439 [inline]
 __se_sys_openat fs/open.c:1434 [inline]
 __arm64_sys_openat+0xa8/0xc4 fs/open.c:1434
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590

Showing all locks held in the system:
locks held by khungtaskd/31: 1, last CPU#1:
 #0: ffff800088de2060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff800088de2060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff800088de2060 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6837
locks held by pr/ttyAMA-1/41: 2, last CPU#0:
 #0: ffff800088cbf158 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline]
 #0: ffff800088cbf158 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:439 [inline]
 #0: ffff800088cbf158 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x4c/0x68 kernel/printk/printk.c:291
 #1: ffff0000c2ade098 (&port_lock_key){....}-{3:3}, at: __uart_port_lock_irqsave include/linux/serial_core.h:613 [inline]
 #1: ffff0000c2ade098 (&port_lock_key){....}-{3:3}, at: pl011_console_device_lock+0x90/0xe4 drivers/tty/serial/amba-pl011.c:2715
locks held by getty/4488: 2, on CPU#1:
 #0: ffff0000cd2ad0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff8000925de2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211
locks held by udevd/4731: 1, on CPU#1:
 #0: ffff0000c74f7350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 block/bdev.c:990
locks held by syz.2.732/8886: 1, on CPU#0:
 #0: ffff0000c89ca0e8 (&type->s_umount_key#73/1){+.+.}-{4:4}, at: alloc_super fs/super.c:365 [inline]
 #0: ffff0000c89ca0e8 (&type->s_umount_key#73/1){+.+.}-{4:4}, at: sget_fc+0x7b0/0x14e8 fs/super.c:889

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