F2FS-fs (loop5): inconsistent node block, nid:6, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop5): inconsistent node block, nid:6, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] F2FS-fs (loop5): inconsistent node block, nid:6, node_footer[nid:0,ino:0,ofs:0,cpver:0,blkaddr:0] INFO: task kworker/u4:4:2850 blocked for more than 140 seconds. Not tainted 4.14.299-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D27240 2850 2 0x80000000 Workqueue: writeback wb_workfn (flush-7:5) Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 f2fs_balance_fs+0x412/0x5a0 fs/f2fs/segment.c:435 f2fs_write_inode+0x182/0x1d0 fs/f2fs/inode.c:524 write_inode fs/fs-writeback.c:1241 [inline] __writeback_single_inode+0x6a4/0x1010 fs/fs-writeback.c:1439 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 __writeback_inodes_wb+0xbf/0x230 fs/fs-writeback.c:1716 wb_writeback+0x710/0xb80 fs/fs-writeback.c:1822 wb_check_old_data_flush fs/fs-writeback.c:1935 [inline] wb_do_writeback fs/fs-writeback.c:1959 [inline] wb_workfn+0x708/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task syz-executor.3:9549 blocked for more than 140 seconds. Not tainted 4.14.299-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29984 9549 8010 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x118/0x170 fs/fs-writeback.c:218 sync_inodes_sb+0x173/0x880 fs/fs-writeback.c:2447 sync_inodes_one_sb+0x3d/0x50 fs/sync.c:74 iterate_supers+0x124/0x490 fs/super.c:613 sys_sync+0x78/0x130 fs/sync.c:113 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 4 locks held by kworker/u4:4/2850: #0: ("writeback"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (&type->s_umount_key#67){++++}, at: [] trylock_super+0x1b/0xe0 fs/super.c:402 #3: (&sbi->gc_mutex){+.+.}, at: [] f2fs_balance_fs+0x412/0x5a0 fs/f2fs/segment.c:435 2 locks held by syz-executor.3/9549: #0: (&type->s_umount_key#67){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 2 locks held by syz-executor.0/9994: #0: (&type->s_umount_key#67){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 2 locks held by syz-executor.3/10257: #0: (&type->s_umount_key#67){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 2 locks held by syz-executor.0/10795: #0: (&type->s_umount_key#67){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 2 locks held by syz-executor.3/10800: #0: (&type->s_umount_key#67){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: (&bdi->wb_switch_rwsem){+.+.}, at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.299-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 309 Comm: kworker/u4:3 Not tainted 4.14.299-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bat_events batadv_nc_worker task: ffff8880b4ede080 task.stack: ffff8880b4ee8000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__lock_release kernel/locking/lockdep.c:3739 [inline] RIP: 0010:lock_release+0x18b/0x870 kernel/locking/lockdep.c:4017 RSP: 0018:ffff8880b4eefc48 EFLAGS: 00000006 RAX: 0000000000000003 RBX: 1ffff110169ddf8c RCX: 1ffffffff127a6c4 RDX: 0000000000000004 RSI: 0000000000000002 RDI: ffff8880b4ede904 RBP: ffffffff88f78600 R08: 0000000000000000 R09: 0000000000020011 R10: 0000000000000000 R11: ffff8880b4ede080 R12: ffffffff86ebf1d0 R13: ffff8880b4ede080 R14: ffff88813fe468c0 R15: ffff8880a4e25800 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f330004b028 CR3: 00000000a17fe000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:422 [inline] batadv_nc_worker+0x5a7/0xc50 net/batman-adv/network-coding.c:728 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Code: 59 c7 08 0f 82 2a 04 00 00 48 c7 c0 20 36 3d 89 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 <65> 4c 8b 34 25 c0 7f 02 00 38 d0 7c 08 84 d2 0f 85 c8 05 00 00