Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. syzkaller login: [ 27.674909] IPVS: ftp: loaded support on port[0] = 21 [ 27.737753] NILFS error (device loop0): nilfs_check_page: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0 [ 27.751082] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 27.753757] Remounting filesystem read-only [ 27.769574] NILFS (loop0): discard dirty page: offset=0, ino=3 [ 27.776357] NILFS (loop0): discard dirty block: blocknr=42, size=1024 [ 27.783388] NILFS (loop0): discard dirty block: blocknr=43, size=1024 [ 27.790353] NILFS (loop0): discard dirty block: blocknr=44, size=1024 [ 27.797316] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 27.806206] NILFS (loop0): discard dirty page: offset=268697600, ino=6 [ 27.812997] NILFS (loop0): discard dirty block: blocknr=18446744073709551615, size=1024 [ 27.821337] NILFS (loop0): discard dirty block: blocknr=0, size=1024 [ 27.828043] NILFS (loop0): discard dirty block: blocknr=0, size=1024 [ 27.835507] NILFS (loop0): discard dirty block: blocknr=0, size=1024 [ 27.947867] ------------[ cut here ]------------ [ 27.952742] WARNING: CPU: 1 PID: 8001 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 [ 27.960932] Kernel panic - not syncing: panic_on_warn set ... [ 27.960932] [ 27.968285] CPU: 1 PID: 8001 Comm: syz-executor502 Not tainted 4.14.297-syzkaller #0 [ 27.976146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 27.985563] Call Trace: [ 27.988140] dump_stack+0x1b2/0x281 [ 27.991743] panic+0x1f9/0x42d [ 27.994911] ? add_taint.cold+0x16/0x16 [ 27.998864] ? mark_buffer_dirty+0x347/0x480 [ 28.003248] ? mark_buffer_dirty+0x347/0x480 [ 28.007632] __warn.cold+0x20/0x44 [ 28.011149] ? ist_end_non_atomic+0x10/0x10 [ 28.015461] ? mark_buffer_dirty+0x347/0x480 [ 28.019871] report_bug+0x208/0x250 [ 28.023489] do_error_trap+0x195/0x2d0 [ 28.027362] ? math_error+0x2d0/0x2d0 [ 28.031147] ? nilfs_palloc_prepare_alloc_entry+0x63f/0x950 [ 28.036862] ? lock_downgrade+0x740/0x740 [ 28.040988] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.045809] invalid_op+0x1b/0x40 [ 28.049250] ? mark_buffer_dirty+0x347/0x480 [ 28.053634] ? mark_buffer_dirty+0x347/0x480 [ 28.058018] ? nilfs_palloc_commit_alloc_entry+0x3d/0x150 [ 28.063553] ? nilfs_dat_commit_alloc+0x1d1/0x290 [ 28.068374] ? nilfs_direct_propagate+0x1d4/0x270 [ 28.073280] ? nilfs_direct_lookup_contig+0x280/0x280 [ 28.078449] ? lock_acquire+0x170/0x3f0 [ 28.082398] ? nilfs_bmap_propagate+0x21/0x160 [ 28.086973] ? nilfs_bmap_propagate+0x73/0x160 [ 28.091544] ? nilfs_collect_file_data+0x41/0xb0 [ 28.096296] ? nilfs_segctor_apply_buffers+0x191/0x450 [ 28.101551] ? nilfs_collect_dat_data+0xb0/0xb0 [ 28.106198] ? nilfs_segctor_scan_file+0x366/0x630 [ 28.111129] ? nilfs_collect_file_data+0xb0/0xb0 [ 28.115870] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.121296] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.126300] ? nilfs_segctor_do_construct+0x123a/0x79c0 [ 28.131652] ? nilfs_segctor_scan_file+0x630/0x630 [ 28.136561] ? lock_acquire+0x170/0x3f0 [ 28.140510] ? lock_downgrade+0x740/0x740 [ 28.144653] ? do_raw_spin_unlock+0x164/0x220 [ 28.149135] ? _raw_spin_unlock+0x29/0x40 [ 28.153290] ? nilfs_segctor_construct+0x6db/0x8e0 [ 28.158222] ? nilfs_detach_log_writer+0x398/0x980 [ 28.163128] ? nilfs_clean_segments+0x9e0/0x9e0 [ 28.167777] ? dispose_list+0x11c/0x1e0 [ 28.171730] ? evict_inodes+0x2cd/0x3a0 [ 28.175684] ? dispose_list+0x1e0/0x1e0 [ 28.179669] ? nilfs_put_super+0x3f/0x190 [ 28.183789] ? nilfs_freeze+0xb0/0xb0 [ 28.187567] ? generic_shutdown_super+0x144/0x370 [ 28.192388] ? kill_block_super+0x95/0xe0 [ 28.196510] ? deactivate_locked_super+0x6c/0xd0 [ 28.201243] ? deactivate_super+0x7f/0xa0 [ 28.205367] ? cleanup_mnt+0x186/0x2c0 [ 28.209233] ? task_work_run+0x11f/0x190 [ 28.213359] ? do_exit+0xa44/0x2850 [ 28.216972] ? __do_page_fault+0x571/0xad0 [ 28.221286] ? mm_update_next_owner+0x5b0/0x5b0 [ 28.225934] ? lock_downgrade+0x740/0x740 [ 28.230064] ? do_group_exit+0x100/0x2e0 [ 28.234113] ? SyS_exit_group+0x19/0x20 [ 28.238072] ? do_group_exit+0x2e0/0x2e0 [ 28.242113] ? do_syscall_64+0x1d5/0x640 [ 28.246152] ? entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.251908] Kernel Offset: disabled [ 28.255574] Rebooting in 86400 seconds..