syzbot

INFO: task syz.3.2651:13517 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2651      state:D stack:0     pid:13517 tgid:13513 ppid:6409   flags:0x0000000d
Call trace:
 __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x13d4/0x2418 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6621
 io_schedule+0x8c/0x124 kernel/sched/core.c:7401
 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209
 __wait_on_bit kernel/sched/wait_bit.c:49 [inline]
 out_of_line_wait_on_bit+0x208/0x334 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 read_extent_buffer_pages+0x528/0x6d4 fs/btrfs/extent_io.c:3622
 btrfs_read_extent_buffer+0xc0/0x6a4 fs/btrfs/disk-io.c:229
 read_tree_block fs/btrfs/disk-io.c:637 [inline]
 read_tree_root_path+0x240/0x668 fs/btrfs/disk-io.c:1054
 load_global_roots_objectid+0x3b0/0x80c fs/btrfs/disk-io.c:2170
 load_global_roots fs/btrfs/disk-io.c:2215 [inline]
 btrfs_read_roots fs/btrfs/disk-io.c:2238 [inline]
 init_tree_roots+0x83c/0x19c4 fs/btrfs/disk-io.c:2678
 open_ctree+0x12e8/0x21b0 fs/btrfs/disk-io.c:3417
 btrfs_fill_super fs/btrfs/super.c:965 [inline]
 btrfs_get_tree_super fs/btrfs/super.c:1888 [inline]
 btrfs_get_tree+0xdd0/0x1368 fs/btrfs/super.c:2114
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 fc_mount+0x24/0xac fs/namespace.c:1231
 btrfs_get_tree_subvol fs/btrfs/super.c:2077 [inline]
 btrfs_get_tree+0x4e4/0x1368 fs/btrfs/super.c:2115
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3472
 path_mount+0x590/0xe04 fs/namespace.c:3799