NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds NILFS error (device loop0): nilfs_check_page: bad entry in directory #12: rec_len is too small for name_len - offset=16, inode=2, rec_len=16, name_len=6 Remounting filesystem read-only WARNING: CPU: 1 PID: 8100 at include/linux/backing-dev.h:340 inode_to_wb include/linux/backing-dev.h:340 [inline] WARNING: CPU: 1 PID: 8100 at include/linux/backing-dev.h:340 account_page_dirtied+0x8cc/0xbb0 mm/page-writeback.c:2420 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8100 Comm: syz-executor229 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:inode_to_wb include/linux/backing-dev.h:340 [inline] RIP: 0010:account_page_dirtied+0x8cc/0xbb0 mm/page-writeback.c:2420 Code: 88 01 00 00 be ff ff ff ff 48 8d 78 70 e8 ec e1 ca ff 31 ff 89 c3 89 c6 e8 f1 b3 e2 ff 85 db 0f 85 39 f9 ff ff e8 74 b2 e2 ff <0f> 0b e9 2d f9 ff ff e8 68 b2 e2 ff 4c 89 e6 4c 89 ef e8 9d b3 2d RSP: 0018:ffff888092157538 EFLAGS: 00010093 RAX: ffff8880b0d18240 RBX: 0000000000000000 RCX: ffffffff817fd2ef RDX: 0000000000000000 RSI: ffffffff817fd2fc RDI: 0000000000000005 RBP: ffff88808b043b48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffffea0002bea080 R13: ffff88808b0439c0 R14: ffff88808b043838 R15: ffffea0002bea088 __set_page_dirty+0x7f/0x3e0 fs/buffer.c:582 mark_buffer_dirty+0x424/0x5c0 fs/buffer.c:1111 nilfs_btree_propagate_p fs/nilfs2/btree.c:1890 [inline] nilfs_btree_propagate+0x728/0xd80 fs/nilfs2/btree.c:2086 nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337 nilfs_collect_dat_data+0x45/0xd0 fs/nilfs2/segment.c:630 nilfs_segctor_apply_buffers+0x14a/0x490 fs/nilfs2/segment.c:1014 nilfs_segctor_scan_file+0x475/0x6f0 fs/nilfs2/segment.c:1053 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1225 [inline] nilfs_segctor_collect fs/nilfs2/segment.c:1494 [inline] nilfs_segctor_do_construct+0x1562/0x8360 fs/nilfs2/segment.c:2036 nilfs_segctor_construct+0x764/0xae0 fs/nilfs2/segment.c:2372 nilfs_segctor_write_out fs/nilfs2/segment.c:2694 [inline] nilfs_segctor_destroy fs/nilfs2/segment.c:2727 [inline] nilfs_detach_log_writer+0x3b8/0x9f0 fs/nilfs2/segment.c:2807 nilfs_put_super+0x3f/0x1a0 fs/nilfs2/super.c:469 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc8bc5db9e9 Code: Bad RIP value. RSP: 002b:00007ffee84cf358 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fc8bc651330 RCX: 00007fc8bc5db9e9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fc8bc64be40 R10: 00007ffee84cf270 R11: 0000000000000246 R12: 00007fc8bc651330 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Kernel Offset: disabled Rebooting in 86400 seconds..