INFO: task kworker/u8:9:2963 blocked for more than 143 seconds.
      Not tainted 6.11.0-next-20240926-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:9    state:D stack:21552 pid:2963  tgid:2963  ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-bcachefs-7)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5315 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6675
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6767
 io_schedule+0x8d/0x110 kernel/sched/core.c:7552
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1310
 folio_lock include/linux/pagemap.h:1148 [inline]
 writeback_get_folio mm/page-writeback.c:2496 [inline]
 writeback_iter+0x992/0x18d0 mm/page-writeback.c:2590
 write_cache_pages+0xb1/0x230 mm/page-writeback.c:2639
 bch2_writepages+0x14f/0x380 fs/bcachefs/fs-io-buffered.c:639
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 __writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1658
 writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2025
 wb_writeback+0x42f/0xbd0 fs/fs-writeback.c:2136
 wb_check_background_flush fs/fs-writeback.c:2206 [inline]
 wb_do_writeback fs/fs-writeback.c:2294 [inline]
 wb_workfn+0xc58/0x1090 fs/fs-writeback.c:2321
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.0.25:5541 blocked for more than 147 seconds.
      Not tainted 6.11.0-next-20240926-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.25        state:D stack:25184 pid:5541  tgid:5522  ppid:5232   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5315 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6675
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6767
 io_schedule+0x8d/0x110 kernel/sched/core.c:7552
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1310
 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3189