[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.77' (ECDSA) to the list of known hosts. syzkaller login: [ 30.944231] IPVS: ftp: loaded support on port[0] = 21 executing program [ 31.015642] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 31.028267] 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 [ 31.045089] Remounting filesystem read-only [ 31.051794] NILFS (loop0): discard dirty page: offset=0, ino=2 [ 31.058636] NILFS (loop0): discard dirty block: blocknr=18, size=1024 [ 31.066184] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.075131] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.083336] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.091532] NILFS (loop0): discard dirty page: offset=0, ino=6 [ 31.097943] NILFS (loop0): discard dirty block: blocknr=35, size=1024 [ 31.104998] NILFS (loop0): discard dirty block: blocknr=36, size=1024 [ 31.111567] NILFS (loop0): discard dirty block: blocknr=37, size=1024 [ 31.118246] NILFS (loop0): discard dirty block: blocknr=38, size=1024 [ 31.124959] NILFS (loop0): discard dirty page: offset=131072, ino=3 [ 31.131358] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.139599] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.147829] NILFS (loop0): discard dirty block: blocknr=46, size=1024 [ 31.154488] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 31.218014] ------------[ cut here ]------------ [ 31.222876] WARNING: CPU: 0 PID: 7982 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 [ 31.230994] Kernel panic - not syncing: panic_on_warn set ... [ 31.230994] [ 31.238330] CPU: 0 PID: 7982 Comm: syz-executor100 Not tainted 4.14.301-syzkaller #0 [ 31.246199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 31.255527] Call Trace: [ 31.258097] dump_stack+0x1b2/0x281 [ 31.261706] panic+0x1f9/0x42d [ 31.264880] ? add_taint.cold+0x16/0x16 [ 31.268832] ? mark_buffer_dirty+0x347/0x480 [ 31.273232] ? mark_buffer_dirty+0x347/0x480 [ 31.277621] __warn.cold+0x20/0x44 [ 31.281138] ? ist_end_non_atomic+0x10/0x10 [ 31.285434] ? mark_buffer_dirty+0x347/0x480 [ 31.289819] report_bug+0x208/0x250 [ 31.293425] do_error_trap+0x195/0x2d0 [ 31.297287] ? math_error+0x2d0/0x2d0 [ 31.301152] ? trace_hardirqs_on+0x10/0x10 [ 31.305359] ? __bfs.part.0+0x174/0x470 [ 31.309307] ? check_preemption_disabled+0x35/0x240 [ 31.314300] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.319120] invalid_op+0x1b/0x40 [ 31.322548] RIP: 0010:mark_buffer_dirty+0x347/0x480 [ 31.327539] RSP: 0018:ffff88809184f8a8 EFLAGS: 00010297 [ 31.332879] RAX: ffff888095592000 RBX: ffff88808df73d20 RCX: 0000000000005c16 [ 31.340133] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88808df73d20 [ 31.347379] RBP: ffff88808df74220 R08: ffffffff8b9d1bb0 R09: 000000000004058c [ 31.354626] R10: ffff8880955928d8 R11: ffff888095592000 R12: dffffc0000000000 [ 31.361870] R13: ffff88809727b8b8 R14: ffff88808df73d20 R15: ffff88808df74230 [ 31.369130] ? mark_buffer_dirty+0x347/0x480 [ 31.373515] nilfs_segctor_do_construct+0x2af/0x79c0 [ 31.378599] ? nilfs_bmap_test_and_clear_dirty+0x5e/0x70 [ 31.384030] ? nilfs_segctor_scan_file+0x630/0x630 [ 31.388933] ? lock_acquire+0x170/0x3f0 [ 31.392881] ? lock_downgrade+0x740/0x740 [ 31.397010] ? do_raw_spin_unlock+0x164/0x220 [ 31.401480] ? _raw_spin_unlock+0x29/0x40 [ 31.405607] nilfs_segctor_construct+0x6db/0x8e0 [ 31.410346] nilfs_detach_log_writer+0x398/0x980 [ 31.415089] ? nilfs_clean_segments+0x9e0/0x9e0 [ 31.419735] ? lock_downgrade+0x740/0x740 [ 31.423863] ? fsnotify_unmount_inodes+0x1a2/0x210 [ 31.428766] ? dispose_list+0x16/0x1e0 [ 31.432631] ? wait_woken+0x230/0x230 [ 31.436668] ? dispose_list+0x1e0/0x1e0 [ 31.440618] nilfs_put_super+0x3f/0x190 [ 31.444569] ? nilfs_freeze+0xb0/0xb0 [ 31.448350] generic_shutdown_super+0x144/0x370 [ 31.453001] kill_block_super+0x95/0xe0 [ 31.456966] deactivate_locked_super+0x6c/0xd0 [ 31.461525] deactivate_super+0x7f/0xa0 [ 31.465475] cleanup_mnt+0x186/0x2c0 [ 31.469168] task_work_run+0x11f/0x190 [ 31.473036] do_exit+0xa44/0x2850 [ 31.476470] ? __do_page_fault+0x571/0xad0 [ 31.480700] ? mm_update_next_owner+0x5b0/0x5b0 [ 31.485446] ? lock_downgrade+0x740/0x740 [ 31.489575] do_group_exit+0x100/0x2e0 [ 31.493440] SyS_exit_group+0x19/0x20 [ 31.497219] ? do_group_exit+0x2e0/0x2e0 [ 31.501256] do_syscall_64+0x1d5/0x640 [ 31.505120] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 31.510286] RIP: 0033:0x7fd4c79ad9c9 [ 31.513971] RSP: 002b:00007fff2fc24998 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.521654] RAX: ffffffffffffffda RBX: 00007fd4c7a23330 RCX: 00007fd4c79ad9c9 [ 31.528987] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 31.536230] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fd4c7a1de40 [ 31.543476] R10: 0000000000000a1a R11: 0000000000000246 R12: 00007fd4c7a23330 [ 31.550721] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 31.558334] Kernel Offset: disabled [ 31.561990] Rebooting in 86400 seconds..