INFO: task udevd:4540 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:0     pid:4540  tgid:4540  ppid:3137   task_flags:0x400140 flags:0x00000019
Call trace:
 __switch_to+0x208/0x4f0 arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0xd58/0x3180 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xd0/0x344 kernel/sched/core.c:7026
 io_schedule+0xac/0x114 kernel/sched/core.c:7871
 folio_wait_bit_common+0x2a8/0x634 mm/filemap.c:1330
 folio_put_wait_locked mm/filemap.c:1494 [inline]
 do_read_cache_folio+0x240/0x3f4 mm/filemap.c:4006
 read_cache_folio+0x44/0x6c mm/filemap.c:4056
 read_mapping_folio include/linux/pagemap.h:999 [inline]
 read_part_sector+0xac/0x5f4 block/partitions/core.c:722
 msdos_partition+0xe4/0x1f3c block/partitions/msdos.c:592
 check_partition block/partitions/core.c:141 [inline]
 blk_add_partitions block/partitions/core.c:589 [inline]
 bdev_disk_changed+0x508/0xf0c block/partitions/core.c:693
 blkdev_get_whole+0x144/0x1e4 block/bdev.c:748
 bdev_open+0x1dc/0xa84 block/bdev.c:957
 blkdev_open+0x270/0x3dc block/fops.c:694
 do_dentry_open+0x6a4/0x103c fs/open.c:965
 vfs_open+0x5c/0x2fc fs/open.c:1097
 do_open fs/namei.c:3975 [inline]
 path_openat+0x148c/0x24b0 fs/namei.c:4134
 do_filp_open+0x184/0x360 fs/namei.c:4161
 do_sys_openat2+0xe0/0x160 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __arm64_sys_openat+0x12c/0x1bc fs/open.c:1463
 __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+0x40/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x288 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff800087341ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6769
1 lock held by klogd/3126:
2 locks held by getty/3262:
 #0: ffff0000180ec0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80008d65b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdc0 drivers/tty/n_tty.c:2222
1 lock held by sshd-session/3316:
 #0: ffff00006a0b7fd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:638 [inline]
 #0: ffff00006a0b7fd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1546 [inline]
 #0: ffff00006a0b7fd8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1868 [inline]
 #0: ffff00006a0b7fd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x328/0x3180 kernel/sched/core.c:6833
2 locks held by syz-executor/3317:
1 lock held by udevd/4540:
 #0: ffff000014990358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945
2 locks held by kworker/u8:3/4933:
1 lock held by syz.0.732/5709:
 #0: ffff000014990358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945
1 lock held by syz.2.952/6286:
 #0: ffff0000252e26d0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:330 [inline]
 #0: ffff0000252e26d0 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x17c/0x348 mm/util.c:578
2 locks held by syz.2.952/6287:

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