b_state=0x0000012d, b_size=1024 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=4 b_state=0x0000012d, b_size=1024 device loop0 blocksize: 4096 INFO: task kworker/u4:13:5419 blocked for more than 140 seconds. Not tainted 4.14.81+ #6 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:13 D26200 5419 2 0x80000000 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 io_schedule+0x1c/0x70 kernel/sched/core.c:5097 blk_mq_get_tag+0x3a1/0xa20 block/blk-mq-tag.c:161 blk_mq_get_request+0x452/0x1420 block/blk-mq.c:382 blk_mq_make_request+0x2db/0x1a60 block/blk-mq.c:1669 generic_make_request+0x214/0x870 block/blk-core.c:2229 submit_bio+0xa7/0x3a0 block/blk-core.c:2303 submit_bh_wbc.isra.17+0x45f/0x5f0 fs/buffer.c:3144 __block_write_full_page+0x4ee/0x980 fs/buffer.c:1826 block_write_full_page+0x227/0x280 fs/buffer.c:3012 __writepage+0x5f/0xc0 mm/page-writeback.c:2302 write_cache_pages+0x518/0xe90 mm/page-writeback.c:2240 generic_writepages+0xda/0x150 mm/page-writeback.c:2326 do_writepages+0xe0/0x270 mm/page-writeback.c:2341 __writeback_single_inode+0xd8/0x1020 fs/fs-writeback.c:1320 writeback_sb_inodes+0x468/0xcd0 fs/fs-writeback.c:1584 __writeback_inodes_wb+0xf8/0x1e0 fs/fs-writeback.c:1653 wb_writeback+0x4ee/0xb90 fs/fs-writeback.c:1762 wb_do_writeback fs/fs-writeback.c:1892 [inline] wb_workfn+0x1e0/0xe00 fs/fs-writeback.c:1928 process_one_work+0x86e/0x1670 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task blkid:17076 blocked for more than 140 seconds. Not tainted 4.14.81+ #6 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D26792 17076 313 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 io_schedule+0x1c/0x70 kernel/sched/core.c:5097 blk_mq_get_tag+0x3a1/0xa20 block/blk-mq-tag.c:161 blk_mq_get_request+0x452/0x1420 block/blk-mq.c:382 blk_mq_make_request+0x2db/0x1a60 block/blk-mq.c:1669 generic_make_request+0x214/0x870 block/blk-core.c:2229 submit_bio+0xa7/0x3a0 block/blk-core.c:2303 submit_bh_wbc.isra.17+0x45f/0x5f0 fs/buffer.c:3144 submit_bh fs/buffer.c:3150 [inline] block_read_full_page+0x66b/0x7c0 fs/buffer.c:2355 generic_file_buffered_read mm/filemap.c:2130 [inline] generic_file_read_iter+0xa9d/0x1ab0 mm/filemap.c:2263 blkdev_read_iter+0xfe/0x160 fs/block_dev.c:1926 call_read_iter include/linux/fs.h:1776 [inline] new_sync_read fs/read_write.c:401 [inline] __vfs_read+0x414/0x5b0 fs/read_write.c:413 vfs_read+0x11e/0x330 fs/read_write.c:447 SYSC_read fs/read_write.c:577 [inline] SyS_read+0xc2/0x1a0 fs/read_write.c:570 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f504766f310 RSP: 002b:00007ffeef70af18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000080f0000 RCX: 00007f504766f310 RDX: 0000000000000040 RSI: 00000000021c5c58 RDI: 0000000000000003 RBP: 00000000021c5c30 R08: 0000000000000068 R09: 0101010101010101 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000021c5030 R13: 0000000000000040 R14: 00000000021c5080 R15: 00000000021c5c48 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1632: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1760: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142 3 locks held by kworker/u4:13/5419: #0: ("writeback"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 #2: (&type->s_umount_key#23){++++}, at: [] trylock_super+0x1a/0xe0 fs/super.c:402 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.81+ #6 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17064 Comm: syz-executor2 Not tainted 4.14.81+ #6 task: ffff8801d6394680 task.stack: ffff8801c5878000 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x221/0x380 kernel/locking/lockdep.c:3990 RSP: 0018:ffff8801c587f1c0 EFLAGS: 00000046 RAX: ffff8801d172d3d0 RBX: 0000000000000246 RCX: ffff8801d172d3d0 RDX: dffffc0000000000 RSI: 1ffff1003a2e5a7a RDI: ffff8801d6394eac RBP: ffffffff92aceb60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 00007f2404b94700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000792b60 CR3: 00000001c7daa004 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:244 [inline] rcu_read_lock include/linux/rcupdate.h:631 [inline] page_evictable+0x39/0x200 mm/vmscan.c:3967 shrink_active_list+0x44f/0xc80 mm/vmscan.c:2027 shrink_list mm/vmscan.c:2171 [inline] shrink_node_memcg+0x641/0x12e0 mm/vmscan.c:2438 shrink_node+0x301/0xbf0 mm/vmscan.c:2630 shrink_zones mm/vmscan.c:2812 [inline] do_try_to_free_pages+0x349/0xde0 mm/vmscan.c:2874 try_to_free_pages+0x204/0x6b0 mm/vmscan.c:3080 free_more_memory+0x8a/0xc0 fs/buffer.c:271 __getblk_slow fs/buffer.c:1107 [inline] __getblk_gfp+0x533/0x720 fs/buffer.c:1382 __bread_gfp+0x28/0x1e0 fs/buffer.c:1416 sb_bread include/linux/buffer_head.h:307 [inline] read_raw_super_block fs/f2fs/super.c:2830 [inline] f2fs_fill_super+0x27d/0x5590 fs/f2fs/super.c:3058 mount_bdev+0x2ab/0x370 fs/super.c:1149 mount_fs+0x28f/0x31a fs/super.c:1255 vfs_kern_mount.part.9+0xce/0x4a0 fs/namespace.c:1056 vfs_kern_mount fs/namespace.c:1038 [inline] do_new_mount fs/namespace.c:2561 [inline] do_mount+0x404/0x26e0 fs/namespace.c:2891 SYSC_mount fs/namespace.c:3107 [inline] SyS_mount+0xe5/0x100 fs/namespace.c:3084 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457569 RSP: 002b:00007f2404b93c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569 RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000680 RBP: 000000000072bf00 R08: 0000000020000280 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2404b946d4 R13: 00000000004c2b0c R14: 00000000004d4260 R15: 00000000ffffffff Code: 7d 62 02 00 0f 84 12 01 00 00 48 85 c9 0f 84 a4 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 ce 48 89 c8 48 c1 ee 03 80 3c 16 00 <0f> 85 27 01 00 00 4c 8b 19 48 89 2c 24 48 89 c5 48 89 5c 24 08