INFO: task kworker/u8:11:7273 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:11 state:D stack:0 pid:7273 tgid:7273 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-bcachefs-17) Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 io_schedule+0x8c/0x124 kernel/sched/core.c:7574 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1309 __folio_lock+0x2c/0x3c mm/filemap.c:1647 folio_lock include/linux/pagemap.h:1148 [inline] writeback_get_folio mm/page-writeback.c:2496 [inline] writeback_iter+0x6f0/0x1110 mm/page-writeback.c:2590 write_cache_pages+0xb0/0x20c mm/page-writeback.c:2639 bch2_writepages+0x13c/0x304 fs/bcachefs/fs-io-buffered.c:639 do_writepages+0x304/0x7cc mm/page-writeback.c:2683 __writeback_single_inode+0x150/0x156c fs/fs-writeback.c:1658 writeback_sb_inodes+0x648/0x1090 fs/fs-writeback.c:1954 __writeback_inodes_wb+0xec/0x234 fs/fs-writeback.c:2025 wb_writeback+0x400/0xf0c 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+0xc2c/0x104c fs/fs-writeback.c:2321 process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3391 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task syz.3.428:8481 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.428 state:D stack:0 pid:8481 tgid:8424 ppid:6420 flags:0x00000009 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_timeout+0x1cc/0x33c kernel/time/timer.c:2615 __closure_sync_timeout+0x29c/0x3e4 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0x110/0x23c fs/bcachefs/alloc_foreground.c:1799 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] __bch2_write+0x4264/0x486c fs/bcachefs/io_write.c:1504 bch2_write+0x908/0x15c8 fs/bcachefs/io_write.c:1634 closure_queue include/linux/closure.h:270 [inline] closure_call include/linux/closure.h:432 [inline] bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:449 [inline] bch2_writepages+0x224/0x304 fs/bcachefs/fs-io-buffered.c:641 do_writepages+0x304/0x7cc mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x124/0x174 mm/filemap.c:398 __filemap_fdatawrite_range mm/filemap.c:431 [inline] file_write_and_wait_range+0x170/0x254 mm/filemap.c:788 bch2_fsync+0x14c/0x44c fs/bcachefs/fs-io.c:199 vfs_fsync_range fs/sync.c:188 [inline] vfs_fsync fs/sync.c:202 [inline] do_fsync fs/sync.c:212 [inline] __do_sys_fdatasync fs/sync.c:225 [inline] __se_sys_fdatasync fs/sync.c:223 [inline] __arm64_sys_fdatasync+0xac/0x104 fs/sync.c:223 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.3.428:8488 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.428 state:D stack:0 pid:8488 tgid:8424 ppid:6420 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 io_schedule+0x8c/0x124 kernel/sched/core.c:7574 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1309 folio_wait_bit+0x30/0x40 mm/filemap.c:1448 folio_wait_writeback mm/page-writeback.c:3189 [inline] folio_prepare_writeback mm/page-writeback.c:2455 [inline] writeback_get_folio mm/page-writeback.c:2497 [inline] writeback_iter+0x89c/0x1110 mm/page-writeback.c:2590 write_cache_pages+0xb0/0x20c mm/page-writeback.c:2639 bch2_writepages+0x13c/0x304 fs/bcachefs/fs-io-buffered.c:639 do_writepages+0x304/0x7cc mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x124/0x174 mm/filemap.c:398 __filemap_fdatawrite_range mm/filemap.c:431 [inline] file_write_and_wait_range+0x170/0x254 mm/filemap.c:788 bch2_fsync+0x14c/0x44c fs/bcachefs/fs-io.c:199 vfs_fsync_range fs/sync.c:188 [inline] vfs_fsync fs/sync.c:202 [inline] do_fsync fs/sync.c:212 [inline] __do_sys_fdatasync fs/sync.c:225 [inline] __se_sys_fdatasync fs/sync.c:223 [inline] __arm64_sys_fdatasync+0xac/0x104 fs/sync.c:223 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task bch-reclaim/loo:8467 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:bch-reclaim/loo state:D stack:0 pid:8467 tgid:8467 ppid:2 flags:0x00000008 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_timeout+0x1cc/0x33c kernel/time/timer.c:2615 __closure_sync_timeout+0x29c/0x3e4 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0x110/0x23c fs/bcachefs/alloc_foreground.c:1799 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] bch2_btree_update_start+0x11a8/0x15ac fs/bcachefs/btree_update_interior.c:1274 bch2_btree_split_leaf+0x118/0x7b0 fs/bcachefs/btree_update_interior.c:1850 bch2_trans_commit_error+0x2a8/0x1150 fs/bcachefs/btree_trans_commit.c:942 __bch2_trans_commit+0x2a80/0x6604 fs/bcachefs/btree_trans_commit.c:1140 bch2_trans_commit fs/bcachefs/btree_update.h:184 [inline] bch2_btree_write_buffer_flush_locked+0x24cc/0x2c98 fs/bcachefs/btree_write_buffer.c:429 btree_write_buffer_flush_seq+0xff8/0x1130 fs/bcachefs/btree_write_buffer.c:510 bch2_btree_write_buffer_journal_flush+0x58/0x94 fs/bcachefs/btree_write_buffer.c:525 journal_flush_pins+0x524/0xa10 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0x72c/0xfcc fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x154/0x4b8 fs/bcachefs/journal_reclaim.c:740 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task bch-copygc/loop:8478 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:bch-copygc/loop state:D stack:0 pid:8478 tgid:8478 ppid:2 flags:0x00000008 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_timeout+0x1cc/0x33c kernel/time/timer.c:2615 __closure_sync_timeout+0x29c/0x3e4 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0x110/0x23c fs/bcachefs/alloc_foreground.c:1799 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] __bch2_write+0x4264/0x486c fs/bcachefs/io_write.c:1504 bch2_write+0x908/0x15c8 fs/bcachefs/io_write.c:1634 closure_queue include/linux/closure.h:270 [inline] closure_call include/linux/closure.h:432 [inline] bch2_data_update_read_done+0x14c/0x1e0 fs/bcachefs/data_update.c:424 move_write fs/bcachefs/move.c:133 [inline] bch2_moving_ctxt_do_pending_writes+0x330/0x80c fs/bcachefs/move.c:164 bch2_move_ratelimit+0x5e0/0xbd8 fs/bcachefs/move.c:492 bch2_evacuate_bucket+0x1894/0x22f8 fs/bcachefs/move.c:702 bch2_copygc+0x2d50/0x3514 fs/bcachefs/movinggc.c:240 bch2_copygc_thread+0x65c/0xbdc fs/bcachefs/movinggc.c:381 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff80008f9e0760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 2 locks held by kworker/u8:5/529: #0: ffff0001b3671918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline] #0: ffff0001b3671918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline] #0: ffff0001b3671918 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1804 [inline] #0: ffff0001b3671918 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2e0/0x2804 kernel/sched/core.c:6589 #1: ffff0001b365c388 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x394/0x5e8 kernel/sched/psi.c:987 2 locks held by getty/6188: #0: ffff0000d25420a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b83b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:11/7273: #0: ffff0000c20f6948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000a1ee7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff0000d57440e0 (&type->s_umount_key#74){.+.+}-{3:3}, at: super_trylock_shared+0x28/0xe4 fs/super.c:562 4 locks held by bch-reclaim/loo/8467: #0: ffff0000e274b0a8 (&j->reclaim_lock){+.+.}-{3:3}, at: bch2_journal_reclaim_thread+0x144/0x4b8 fs/bcachefs/journal_reclaim.c:739 #1: ffff0000e2704398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:150 #2: ffff0000e2704740 (&wb->flushing.lock){+.+.}-{3:3}, at: btree_write_buffer_flush_seq+0xff0/0x1130 fs/bcachefs/btree_write_buffer.c:509 #3: ffff0000e27266d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1202 2 locks held by syz.0.658/9573: #0: ffff0000d57440e0 (&type->s_umount_key#74){.+.+}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000d57440e0 (&type->s_umount_key#74){.+.+}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000d57467d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff0000d57467d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x9ac fs/fs-writeback.c:2797 =============================================