[ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.109' (ECDSA) to the list of known hosts. syzkaller login: [ 27.477255] IPVS: ftp: loaded support on port[0] = 21 executing program [ 27.572734] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 27.575735] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 27.595242] NILFS error (device loop0): nilfs_bmap_lookup_contig: broken bmap (inode number=16) [ 27.605001] Remounting filesystem read-only [ 27.610711] NILFS (loop0): bad btree node (ino=16, blocknr=15): level = 0, flags = 0x0, nchildren = 0 [ 27.620814] NILFS error (device loop0): nilfs_bmap_last_key: broken bmap (inode number=16) [ 27.629701] NILFS (loop0): error -5 truncating bmap (ino=16) [ 27.640456] ------------[ cut here ]------------ [ 27.645363] WARNING: CPU: 1 PID: 7974 at include/linux/backing-dev.h:335 account_page_dirtied+0x8df/0xbb0 [ 27.655059] Kernel panic - not syncing: panic_on_warn set ... [ 27.655059] [ 27.662409] CPU: 1 PID: 7974 Comm: syz-executor375 Not tainted 4.14.295-syzkaller #0 [ 27.670266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.679599] Call Trace: [ 27.682175] dump_stack+0x1b2/0x281 [ 27.685785] panic+0x1f9/0x42d [ 27.688958] ? add_taint.cold+0x16/0x16 [ 27.692919] ? account_page_dirtied+0x8df/0xbb0 [ 27.697574] ? account_page_dirtied+0x8df/0xbb0 [ 27.702230] __warn.cold+0x20/0x44 [ 27.705759] ? ist_end_non_atomic+0x10/0x10 [ 27.710066] ? account_page_dirtied+0x8df/0xbb0 [ 27.714720] report_bug+0x208/0x250 [ 27.718335] do_error_trap+0x195/0x2d0 [ 27.722209] ? math_error+0x2d0/0x2d0 [ 27.725994] ? deactivate_locked_super+0x6c/0xd0 [ 27.730729] ? deactivate_super+0x7f/0xa0 [ 27.734863] ? cleanup_mnt+0x186/0x2c0 [ 27.738733] ? trace_hardirqs_on+0x10/0x10 [ 27.742949] ? trace_hardirqs_on+0x10/0x10 [ 27.747168] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.752000] invalid_op+0x1b/0x40 [ 27.755442] RIP: 0010:account_page_dirtied+0x8df/0xbb0 [ 27.760701] RSP: 0018:ffff8880b3777640 EFLAGS: 00010097 [ 27.766046] RAX: ffff8880b3352140 RBX: ffff8880aecf9580 RCX: 1ffffffff127a5d4 [ 27.773298] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000086 [ 27.780584] RBP: ffff88808db0db58 R08: ffffffff8ba5db4c R09: 0000000000001cd4 [ 27.787835] R10: 0000000000000001 R11: ffff8880b3352140 R12: ffffea0002d49b80 [ 27.795088] R13: ffff88808db0d9c8 R14: ffff88808db0d9c8 R15: ffffea0002d49ba0 [ 27.802359] __set_page_dirty+0x77/0x2a0 [ 27.806494] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.811932] mark_buffer_dirty+0x307/0x480 [ 27.816153] nilfs_btree_propagate+0x3a3/0xc20 [ 27.820732] nilfs_bmap_propagate+0x73/0x160 [ 27.825325] nilfs_collect_dat_data+0x41/0xb0 [ 27.829802] nilfs_segctor_apply_buffers+0x191/0x450 [ 27.834890] ? nilfs_collect_file_bmap+0x70/0x70 [ 27.839647] nilfs_segctor_scan_file+0x366/0x630 [ 27.844475] ? nilfs_collect_file_data+0xb0/0xb0 [ 27.849216] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.854654] nilfs_segctor_do_construct+0x1420/0x78d0 [ 27.859841] ? nilfs_segctor_scan_file+0x630/0x630 [ 27.864756] ? lock_acquire+0x170/0x3f0 [ 27.868714] ? lock_downgrade+0x740/0x740 [ 27.872853] ? do_raw_spin_unlock+0x164/0x220 [ 27.877347] ? _raw_spin_unlock+0x29/0x40 [ 27.881482] nilfs_segctor_construct+0x6db/0x8e0 [ 27.886233] nilfs_detach_log_writer+0x398/0x980 [ 27.890970] ? nilfs_clean_segments+0x990/0x990 [ 27.895619] ? dispose_list+0x11c/0x1e0 [ 27.899576] ? evict_inodes+0x2cd/0x3a0 [ 27.903534] ? dispose_list+0x1e0/0x1e0 [ 27.907491] nilfs_put_super+0x3f/0x190 [ 27.911450] ? nilfs_freeze+0xb0/0xb0 [ 27.915234] generic_shutdown_super+0x144/0x370 [ 27.919885] kill_block_super+0x95/0xe0 [ 27.923843] deactivate_locked_super+0x6c/0xd0 [ 27.928413] deactivate_super+0x7f/0xa0 [ 27.932373] cleanup_mnt+0x186/0x2c0 [ 27.936089] task_work_run+0x11f/0x190 [ 27.939996] do_exit+0xa44/0x2850 [ 27.943437] ? __do_page_fault+0x571/0xad0 [ 27.947653] ? mm_update_next_owner+0x5b0/0x5b0 [ 27.952306] ? lock_downgrade+0x740/0x740 [ 27.956440] do_group_exit+0x100/0x2e0 [ 27.960683] SyS_exit_group+0x19/0x20 [ 27.964469] ? do_group_exit+0x2e0/0x2e0 [ 27.968512] do_syscall_64+0x1d5/0x640 [ 27.972389] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.977560] RIP: 0033:0x7ff517f9cbb9 [ 27.981251] RSP: 002b:00007ffc95e4b558 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.988956] RAX: ffffffffffffffda RBX: 00007ff518014330 RCX: 00007ff517f9cbb9 [ 27.996208] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.003471] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007ff51800ee40 [ 28.010735] R10: 00007ffc95e4b470 R11: 0000000000000246 R12: 00007ff518014330 [ 28.017989] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 28.025635] Kernel Offset: disabled [ 28.029319] Rebooting in 86400 seconds..