INFO: task kworker/0:1:10 blocked for mor INFO: task kworker/0:1:10 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:0 pid:10 tgid:10 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: bcachefs_write_ref bch2_do_discards_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 __closure_sync_timeout+0x25c/0x3c0 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0xfc/0x214 fs/bcachefs/alloc_foreground.c:1677 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline] bch2_btree_update_start+0x158c/0x1ab8 fs/bcachefs/btree_update_interior.c:1293 bch2_btree_split_leaf+0x118/0x71c fs/bcachefs/btree_update_interior.c:1921 bch2_trans_commit_error+0x17c/0x11a0 fs/bcachefs/btree_trans_commit.c:914 __bch2_trans_commit+0x17a4/0x625c fs/bcachefs/btree_trans_commit.c:1104 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline] bch2_discard_one_bucket+0x680/0xcd8 fs/bcachefs/alloc_background.c:1913 bch2_do_discards_work+0x210/0x740 fs/bcachefs/alloc_background.c:1947 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 INFO: task kworker/u8:2:41 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:2 state:D stack:0 pid:41 tgid:41 ppid:2 task_flags:0x4248060 flags:0x00000010 Workqueue: writeback wb_workfn (flush-bcachefs-12) Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 __closure_sync_timeout+0x25c/0x3c0 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0xfc/0x214 fs/bcachefs/alloc_foreground.c:1677 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline] __bch2_write+0x2874/0x2e78 fs/bcachefs/io_write.c:1593 bch2_write+0x73c/0x106c fs/bcachefs/io_write.c:1722 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:486 [inline] __bch2_writepage+0xd7c/0x1b3c fs/bcachefs/fs-io-buffered.c:633 write_cache_pages+0x6c/0x108 mm/page-writeback.c:2612 bch2_writepages+0xfc/0x294 fs/bcachefs/fs-io-buffered.c:666 do_writepages+0x270/0x468 mm/page-writeback.c:2634 __writeback_single_inode+0x15c/0x13e8 fs/fs-writeback.c:1680 writeback_sb_inodes+0x55c/0xe40 fs/fs-writeback.c:1976 __writeback_inodes_wb+0xec/0x228 fs/fs-writeback.c:2047 wb_writeback+0x3e0/0xd70 fs/fs-writeback.c:2158 wb_check_old_data_flush fs/fs-writeback.c:2262 [inline] wb_do_writeback fs/fs-writeback.c:2315 [inline] wb_workfn+0xa08/0xdc0 fs/fs-writeback.c:2343 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 INFO: task syz.1.68:7026 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.68 state:D stack:0 pid:7026 tgid:7025 ppid:6526 task_flags:0x440140 flags:0x00000019 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 __closure_sync_timeout+0x25c/0x3c0 lib/closure.c:217 closure_sync_timeout include/linux/closure.h:206 [inline] __bch2_wait_on_allocator+0xfc/0x214 fs/bcachefs/alloc_foreground.c:1677 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:315 [inline] __bch2_write+0x2874/0x2e78 fs/bcachefs/io_write.c:1593 bch2_write+0x73c/0x106c fs/bcachefs/io_write.c:1722 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:486 [inline] __bch2_writepage+0xd7c/0x1b3c fs/bcachefs/fs-io-buffered.c:633 write_cache_pages+0x6c/0x108 mm/page-writeback.c:2612 bch2_writepages+0xfc/0x294 fs/bcachefs/fs-io-buffered.c:666 do_writepages+0x270/0x468 mm/page-writeback.c:2634 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] __filemap_fdatawrite_range mm/filemap.c:419 [inline] file_write_and_wait_range+0x1d0/0x2c4 mm/filemap.c:794 bch2_fsync+0x14c/0x3f4 fs/bcachefs/fs-io.c:245 vfs_fsync_range+0x160/0x19c fs/sync.c:187 generic_write_sync include/linux/fs.h:3043 [inline] bch2_write_iter+0x1fdc/0x2300 fs/bcachefs/fs-io-buffered.c:1089 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 4 locks held by kworker/0:1/10: #0: ffff0000d308ed48 ((wq_completion)bcachefs_write_ref#3){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff800097c17be0 ((work_completion)(&ca->discard_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000e0b04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #3: ffff0000e0b26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x468/0x1ab8 fs/bcachefs/btree_update_interior.c:1211 1 lock held by khungtaskd/32: #0: ffff80008f9c9360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: #0: ffff0000c1f72948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff800099297be0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000dd8700e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_trylock_shared+0x24/0xdc fs/super.c:563 2 locks held by pr/ttyAMA-1/43: 2 locks held by getty/6311: #0: ffff0000c19cd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bbdb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by syz.1.68/7026: #0: ffff0000dd870428 (sb_writers#11){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3108 [inline] #0: ffff0000dd870428 (sb_writers#11){.+.+}-{0:0}, at: vfs_write+0x24c/0xa3c fs/read_write.c:682 =============================================