INFO: task kworker/u4:14:6978 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:14   state:D stack:23264 pid:6978  ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-btrfs-20)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 wait_on_state fs/btrfs/extent-io-tree.c:709 [inline]
 wait_extent_bit+0x423/0x570 fs/btrfs/extent-io-tree.c:742
 lock_extent+0x17a/0x200 fs/btrfs/extent-io-tree.c:1657
 find_lock_delalloc_range+0x4bf/0x970 fs/btrfs/extent_io.c:464
 writepage_delalloc+0x1ed/0x580 fs/btrfs/extent_io.c:1965
 __extent_writepage+0x6e3/0x1730 fs/btrfs/extent_io.c:2276
 extent_write_cache_pages fs/btrfs/extent_io.c:3191 [inline]
 extent_writepages+0xbe0/0x17a0 fs/btrfs/extent_io.c:3313
 do_writepages+0x3a2/0x670 mm/page-writeback.c:2469
 __writeback_single_inode+0x15d/0x11e0 fs/fs-writeback.c:1612
 writeback_sb_inodes+0xc2b/0x1b20 fs/fs-writeback.c:1903
 wb_writeback+0x49d/0xe10 fs/fs-writeback.c:2077
 wb_do_writeback fs/fs-writeback.c:2220 [inline]
 wb_workfn+0x427/0x1020 fs/fs-writeback.c:2260