INFO: task kworker/u8:9:5171 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:9 state:D stack:0 pid:5171 tgid:5171 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-bcachefs-1) Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16e0/0x27d0 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:1812 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] __bch2_write+0x4264/0x486c fs/bcachefs/io_write.c:1501 bch2_write+0x908/0x15c8 fs/bcachefs/io_write.c:1631 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 __writeback_single_inode+0x150/0x156c fs/fs-writeback.c:1658 writeback_sb_inodes+0x648/0x1090 fs/fs-writeback.c:1954 wb_writeback+0x3ec/0xf0c fs/fs-writeback.c:2134 wb_do_writeback fs/fs-writeback.c:2281 [inline] wb_workfn+0x38c/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-executor:6423 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6423 tgid:6423 ppid:1 flags:0x00000009 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16e0/0x27d0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 wb_wait_for_completion+0x154/0x29c fs/fs-writeback.c:216 __writeback_inodes_sb_nr+0x244/0x2d8 fs/fs-writeback.c:2713 writeback_inodes_sb_nr fs/fs-writeback.c:2730 [inline] writeback_inodes_sb+0x7c/0x90 fs/fs-writeback.c:2745 sync_filesystem+0xa0/0x218 fs/sync.c:54 generic_shutdown_super+0x70/0x2bc fs/super.c:621 bch2_kill_sb+0x40/0x58 fs/bcachefs/fs.c:2278 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380 task_work_run+0x230/0x2e0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 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:6568 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:bch-reclaim/loo state:D stack:0 pid:6568 tgid:6568 ppid:2 flags:0x00000008 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16e0/0x27d0 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:1812 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] bch2_btree_update_start+0x11a8/0x15ac fs/bcachefs/btree_update_interior.c:1269 bch2_btree_split_leaf+0x118/0x7b0 fs/bcachefs/btree_update_interior.c:1856 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:6583 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:bch-copygc/loop state:D stack:0 pid:6583 tgid:6583 ppid:2 flags:0x00000008 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16e0/0x27d0 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:1812 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:239 [inline] __bch2_write+0x4264/0x486c fs/bcachefs/io_write.c:1501 bch2_write+0x908/0x15c8 fs/bcachefs/io_write.c:1631 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:426 move_write fs/bcachefs/move.c:133 [inline] bch2_moving_ctxt_do_pending_writes+0x330/0x80c fs/bcachefs/move.c:164 move_buckets_wait+0x248/0xfac fs/bcachefs/movinggc.c:120 bch2_copygc_thread+0x754/0xbdc fs/bcachefs/movinggc.c:392 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: 5 locks held by kworker/u8:1/13: #0: ffff0000c1891948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000978f7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff800092717950 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0x9b4 net/core/net_namespace.c:580 #3: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 #4: ffff0000ed65d428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_netns_pre_exit+0xbc/0x1d4 drivers/net/wireguard/device.c:419 3 locks held by kworker/1:1/27: 1 lock held by khungtaskd/31: #0: ffff80008f9efee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:7/3598: #0: ffff0000d0d2d948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000a2a67c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by kworker/u8:9/5171: #0: ffff0000c20f6948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff80009e747c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 4 locks held by udevd/6038: #0: ffff0000dc1cc540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #1: ffff0000d8104c88 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x384 fs/kernfs/file.c:154 #2: ffff0000d3d6eb48 (kn->active#4){++++}-{0:0}, at: kernfs_seq_start+0x74/0x384 fs/kernfs/file.c:155 #3: ffff0000ebcc30e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff0000ebcc30e8 (&dev->mutex){....}-{3:3}, at: uevent_show+0x17c/0x33c drivers/base/core.c:2736 2 locks held by getty/6179: #0: ffff0000d2ac50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b84b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/6423: #0: ffff0000d6fdc0e0 (&type->s_umount_key#57){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000d6fdc0e0 (&type->s_umount_key#57){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000d6fdc0e0 (&type->s_umount_key#57){+.+.}-{3:3}, at: deactivate_super+0xd8/0x100 fs/super.c:505 2 locks held by kworker/1:5/6508: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000aff57c20 ((work_completion)(&(&devlink->rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 4 locks held by bch-reclaim/loo/6568: #0: ffff0000f31cb0a8 (&j->reclaim_lock){+.+.}-{3:3}, at: bch2_journal_reclaim_thread+0x144/0x4b8 fs/bcachefs/journal_reclaim.c:739 #1: ffff0000f3184398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:150 #2: ffff0000f3184740 (&wb->flushing.lock){+.+.}-{3:3}, at: btree_write_buffer_flush_seq+0xff0/0x1130 fs/bcachefs/btree_write_buffer.c:509 #3: ffff0000f31a66d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1197 1 lock held by syz-executor/8896: #0: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6672 4 locks held by syz-executor/8982: #0: ffff0000d8098420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff0000d8098420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x354/0xcf4 fs/read_write.c:679 #1: ffff0000f62cc088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000c5c01e18 (kn->active#44){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff8000918823c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216 7 locks held by syz-executor/8995: #0: ffff0000d8098420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff0000d8098420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x354/0xcf4 fs/read_write.c:679 #1: ffff0000ce75d488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000c5c01d28 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff8000918823c8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x170/0x704 drivers/net/netdevsim/bus.c:166 #4: ffff0000ebcc30e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff0000ebcc30e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x434 drivers/base/dd.c:1005 #5: ffff0000ebcc2250 (&devlink->lock_key#20){+.+.}-{3:3}, at: devl_lock+0x24/0x34 net/devlink/core.c:276 #6: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/9101: #0: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6672 2 locks held by syz-executor/9112: #0: ffff800092717950 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x290/0x4ac net/core/net_namespace.c:490 #1: ffff800092723e68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 =============================================