Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. syzkaller login: [ 34.915017] IPVS: ftp: loaded support on port[0] = 21 executing program [ 34.972342] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 34.992929] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 35.002992] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 35.013407] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 35.023561] Remounting filesystem read-only [ 35.028718] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 35.038570] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 35.047411] NILFS (loop0): error -5 truncating bmap (ino=16) [ 35.058250] ------------[ cut here ]------------ [ 35.063214] WARNING: CPU: 0 PID: 7968 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 35.072900] Kernel panic - not syncing: panic_on_warn set ... [ 35.072900] [ 35.080245] CPU: 0 PID: 7968 Comm: syz-executor207 Not tainted 4.14.295-syzkaller #0 [ 35.088101] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 35.097432] Call Trace: [ 35.100002] dump_stack+0x1b2/0x281 [ 35.103607] panic+0x1f9/0x42d [ 35.106778] ? add_taint.cold+0x16/0x16 [ 35.110732] ? account_page_dirtied+0x8df/0xbb0 [ 35.115381] ? account_page_dirtied+0x8df/0xbb0 [ 35.120025] __warn.cold+0x20/0x44 [ 35.123543] ? ist_end_non_atomic+0x10/0x10 [ 35.127843] ? account_page_dirtied+0x8df/0xbb0 [ 35.132488] report_bug+0x208/0x250 [ 35.136096] do_error_trap+0x195/0x2d0 [ 35.139959] ? math_error+0x2d0/0x2d0 [ 35.143778] ? deactivate_locked_super+0x6c/0xd0 [ 35.148510] ? deactivate_super+0x7f/0xa0 [ 35.152634] ? cleanup_mnt+0x186/0x2c0 [ 35.156499] ? trace_hardirqs_on+0x10/0x10 [ 35.160709] ? trace_hardirqs_on+0x10/0x10 [ 35.164923] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.169750] invalid_op+0x1b/0x40 [ 35.173186] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 35.178435] RSP: 0018:ffff8880961ef640 EFLAGS: 00010097 [ 35.183810] RAX: ffff8880958d0140 RBX: ffff8880aec20a40 RCX: 1ffffffff127a5d4 [ 35.191057] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 35.198310] RBP: ffff88808e30ab58 R08: ffffffff8ba5d75c R09: 0000000000001cb8 [ 35.205656] R10: 0000000000000001 R11: ffff8880958d0140 R12: ffffea0002ab8880 [ 35.212921] R13: ffff88808e30a9c8 R14: ffff88808e30a9c8 R15: ffffea0002ab88a0 [ 35.220199] __set_page_dirty+0x77/0x2a0 [ 35.224241] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 35.229672] mark_buffer_dirty+0x307/0x480 [ 35.233890] nilfs_btree_propagate+0x3a3/0xc20 [ 35.238454] nilfs_bmap_propagate+0x73/0x160 [ 35.242927] nilfs_collect_dat_data+0x41/0xb0 [ 35.247403] nilfs_segctor_apply_buffers+0x191/0x450 [ 35.252484] ? nilfs_collect_file_bmap+0x70/0x70 [ 35.257220] nilfs_segctor_scan_file+0x366/0x630 [ 35.261966] ? nilfs_collect_file_data+0xb0/0xb0 [ 35.266711] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 35.272150] nilfs_segctor_do_construct+0x1420/0x78d0 [ 35.277331] ? nilfs_segctor_scan_file+0x630/0x630 [ 35.282242] ? lock_acquire+0x170/0x3f0 [ 35.286209] ? lock_downgrade+0x740/0x740 [ 35.290345] ? do_raw_spin_unlock+0x164/0x220 [ 35.294835] ? _raw_spin_unlock+0x29/0x40 [ 35.298981] nilfs_segctor_construct+0x6db/0x8e0 [ 35.303723] nilfs_detach_log_writer+0x398/0x980 [ 35.308463] ? nilfs_clean_segments+0x990/0x990 [ 35.313117] ? dispose_list+0x11c/0x1e0 [ 35.317096] ? wait_woken+0x230/0x230 [ 35.320879] ? dispose_list+0x1e0/0x1e0 [ 35.324834] nilfs_put_super+0x3f/0x190 [ 35.328874] ? nilfs_freeze+0xb0/0xb0 [ 35.332670] generic_shutdown_super+0x144/0x370 [ 35.337334] kill_block_super+0x95/0xe0 [ 35.341299] deactivate_locked_super+0x6c/0xd0 [ 35.345864] deactivate_super+0x7f/0xa0 [ 35.349820] cleanup_mnt+0x186/0x2c0 [ 35.353516] task_work_run+0x11f/0x190 [ 35.357388] do_exit+0xa44/0x2850 [ 35.360827] ? __do_page_fault+0x571/0xad0 [ 35.365038] ? mm_update_next_owner+0x5b0/0x5b0 [ 35.369684] ? lock_downgrade+0x740/0x740 [ 35.373819] do_group_exit+0x100/0x2e0 [ 35.377688] SyS_exit_group+0x19/0x20 [ 35.381465] ? do_group_exit+0x2e0/0x2e0 [ 35.385501] do_syscall_64+0x1d5/0x640 [ 35.389386] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.394562] RIP: 0033:0x7fe0d822eb89 [ 35.398256] RSP: 002b:00007ffd1c8b1ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 35.405995] RAX: ffffffffffffffda RBX: 00007fe0d82a6330 RCX: 00007fe0d822eb89 [ 35.413245] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 35.420495] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fe0d82a0e40 [ 35.427745] R10: 00007ffd1c8b1e00 R11: 0000000000000246 R12: 00007fe0d82a6330 [ 35.434990] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 35.442682] Kernel Offset: disabled [ 35.446345] Rebooting in 86400 seconds..