[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.175' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.429180] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 27.437006] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 27.446511] F2FS-fs (loop0): invalid crc value [ 27.478358] F2FS-fs (loop0): access invalid blkaddr:1 [ 27.483770] ------------[ cut here ]------------ [ 27.488534] WARNING: CPU: 1 PID: 7965 at fs/f2fs/checkpoint.c:150 f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.497783] Kernel panic - not syncing: panic_on_warn set ... [ 27.497783] [ 27.505138] CPU: 1 PID: 7965 Comm: syz-executor753 Not tainted 4.14.241-syzkaller #0 [ 27.513005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.522339] Call Trace: [ 27.524913] dump_stack+0x1b2/0x281 [ 27.528535] panic+0x1f9/0x42d [ 27.531701] ? add_taint.cold+0x16/0x16 [ 27.535666] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.540423] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.545152] __warn.cold+0x20/0x44 [ 27.548677] ? ist_end_non_atomic+0x10/0x10 [ 27.552974] ? f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.557699] report_bug+0x208/0x250 [ 27.561315] do_error_trap+0x195/0x2d0 [ 27.565192] ? math_error+0x2d0/0x2d0 [ 27.568981] ? log_store.cold+0x16/0x16 [ 27.573016] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 27.578009] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 27.583097] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.587916] invalid_op+0x1b/0x40 [ 27.591342] RIP: 0010:f2fs_is_valid_blkaddr+0x2d9/0x920 [ 27.596674] RSP: 0018:ffff888096e87820 EFLAGS: 00010286 [ 27.602012] RAX: dffffc0000000000 RBX: ffff8880b3b503c0 RCX: 0000000000000000 [ 27.609270] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1012dd0ede [ 27.616511] RBP: 0000000000000005 R08: 0000000000000029 R09: 0000000000000000 [ 27.623765] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 27.631006] R13: 0000000000000001 R14: 0000000000001400 R15: 0000000000000400 [ 27.638275] f2fs_submit_page_bio+0x10a/0x1380 [ 27.642839] ? check_preemption_disabled+0x35/0x240 [ 27.647918] read_node_page+0x209/0x2f0 [ 27.651868] ? truncate_node+0xc80/0xc80 [ 27.655920] __get_node_page.part.0+0x97/0xea0 [ 27.660477] get_node_page+0xdd/0x170 [ 27.664254] f2fs_iget+0x1e8/0x3760 [ 27.667858] ? kmem_cache_alloc_trace+0x36c/0x3d0 [ 27.672677] f2fs_fill_super+0x30ac/0x56a0 [ 27.676897] ? snprintf+0xa5/0xd0 [ 27.680339] ? f2fs_commit_super+0x3a0/0x3a0 [ 27.684737] ? ns_test_super+0x50/0x50 [ 27.688605] ? set_blocksize+0x125/0x380 [ 27.692683] mount_bdev+0x2b3/0x360 [ 27.696295] ? f2fs_commit_super+0x3a0/0x3a0 [ 27.700683] mount_fs+0x92/0x2a0 [ 27.704173] vfs_kern_mount.part.0+0x5b/0x470 [ 27.708648] do_mount+0xe53/0x2a00 [ 27.712169] ? retint_kernel+0x2d/0x2d [ 27.716078] ? copy_mount_string+0x40/0x40 [ 27.720304] ? memset+0x20/0x40 [ 27.723560] ? copy_mount_options+0x1fa/0x2f0 [ 27.728026] ? copy_mnt_ns+0xa30/0xa30 [ 27.731885] SyS_mount+0xa8/0x120 [ 27.735346] ? copy_mnt_ns+0xa30/0xa30 [ 27.739218] do_syscall_64+0x1d5/0x640 [ 27.743082] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.748246] RIP: 0033:0x4458ba [ 27.751497] RSP: 002b:00007ffd6fa535f8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.759180] RAX: ffffffffffffffda RBX: 00007ffd6fa53650 RCX: 00000000004458ba [ 27.766425] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd6fa53610 [ 27.773678] RBP: 00007ffd6fa53610 R08: 00007ffd6fa53650 R09: 0000000000000000 [ 27.780924] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000698 [ 27.788168] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000031 [ 27.796888] Kernel Offset: disabled [ 27.800547] Rebooting in 86400 seconds..