[ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.352230] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 37.360584] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 37.369806] F2FS-fs (loop0): invalid crc value [ 37.405484] F2FS-fs (loop0): access invalid blkaddr:1 [ 37.411360] ------------[ cut here ]------------ [ 37.416911] WARNING: CPU: 0 PID: 8100 at fs/f2fs/checkpoint.c:166 f2fs_is_valid_blkaddr+0x35d/0xa20 [ 37.426331] Kernel panic - not syncing: panic_on_warn set ... [ 37.426331] [ 37.434023] CPU: 0 PID: 8100 Comm: syz-executor025 Not tainted 4.19.193-syzkaller #0 [ 37.442109] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.451777] Call Trace: [ 37.454399] dump_stack+0x1fc/0x2ef [ 37.458034] panic+0x26a/0x50e [ 37.461736] ? __warn_printk+0xf3/0xf3 [ 37.465650] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 37.470492] ? __probe_kernel_read+0x130/0x1b0 [ 37.475420] ? __warn.cold+0x5/0x5a [ 37.479447] ? __warn+0xe4/0x200 [ 37.483392] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 37.488768] __warn.cold+0x20/0x5a [ 37.492315] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 37.497241] report_bug+0x262/0x2b0 [ 37.500862] do_error_trap+0x1d7/0x310 [ 37.504737] ? math_error+0x310/0x310 [ 37.508670] ? __irq_work_queue_local+0x101/0x160 [ 37.513541] ? irq_work_queue+0x29/0x80 [ 37.517521] ? error_entry+0x72/0xd0 [ 37.521342] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.526601] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.531553] invalid_op+0x14/0x20 [ 37.535016] RIP: 0010:f2fs_is_valid_blkaddr+0x35d/0xa20 [ 37.540394] Code: 7a 06 00 00 48 8b 7d 00 44 89 e1 48 c7 c2 80 15 a8 88 48 c7 c6 20 14 a8 88 e8 bf fa fd ff 48 c7 c7 c0 15 a8 88 e8 fc 4e dd 04 <0f> 0b 45 31 ed e9 3f fe ff ff e8 14 1a 4d fe 48 8d bd 40 01 00 00 [ 37.559376] RSP: 0018:ffff8880b27af740 EFLAGS: 00010282 [ 37.564820] RAX: 0000000000000024 RBX: 0000000000000005 RCX: 0000000000000000 [ 37.572102] RDX: 0000000000000000 RSI: ffffffff814df6b1 RDI: ffffed10164f5eda [ 37.579541] RBP: ffff88809a0c0180 R08: 0000000000000024 R09: 0000000000000000 [ 37.587287] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 37.594829] R13: 0000000000000001 R14: 0000000000001000 R15: 0000000000000200 [ 37.602111] ? vprintk_func+0x81/0x180 [ 37.606002] f2fs_submit_page_bio+0x138/0x1580 [ 37.610580] ? page_cache_tree_insert+0x3f0/0x3f0 [ 37.615565] ? check_preemption_disabled+0x41/0x280 [ 37.620895] read_node_page+0x496/0x630 [ 37.624890] ? truncate_node+0x10c0/0x10c0 [ 37.629436] ? add_to_page_cache_lru+0x259/0x680 [ 37.634523] ? add_to_page_cache_locked+0x40/0x40 [ 37.639381] ? pagecache_get_page+0x1c4/0xd50 [ 37.643898] __get_node_page.part.0+0x9b/0x14b0 [ 37.648719] f2fs_get_node_page+0x109/0x1a0 [ 37.653102] f2fs_iget+0x22a/0x4ce0 [ 37.656738] ? wait_for_completion_io+0x10/0x10 [ 37.661419] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.666515] f2fs_fill_super+0x34b4/0x7050 [ 37.670753] ? snprintf+0xbb/0xf0 [ 37.674210] ? f2fs_commit_super+0x400/0x400 [ 37.678723] ? wait_for_completion_io+0x10/0x10 [ 37.683425] ? set_blocksize+0x163/0x3f0 [ 37.687483] mount_bdev+0x2fc/0x3b0 [ 37.691111] ? f2fs_commit_super+0x400/0x400 [ 37.695507] mount_fs+0xa3/0x310 [ 37.698971] vfs_kern_mount.part.0+0x68/0x470 [ 37.703609] do_mount+0x113c/0x2f10 [ 37.707237] ? do_raw_spin_unlock+0x171/0x230 [ 37.711722] ? check_preemption_disabled+0x41/0x280 [ 37.716731] ? copy_mount_string+0x40/0x40 [ 37.720955] ? copy_mount_options+0x59/0x380 [ 37.725355] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.730412] ? kmem_cache_alloc_trace+0x323/0x380 [ 37.735245] ? copy_mount_options+0x26f/0x380 [ 37.739730] ksys_mount+0xcf/0x130 [ 37.743260] __x64_sys_mount+0xba/0x150 [ 37.747333] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.751940] do_syscall_64+0xf9/0x620 [ 37.755755] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.760938] RIP: 0033:0x4453ea [ 37.764133] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 37.783124] RSP: 002b:00007ffe6791ce88 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 37.790824] RAX: ffffffffffffffda RBX: 00007ffe6791cee0 RCX: 00000000004453ea [ 37.798544] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe6791cea0 [ 37.806271] RBP: 00007ffe6791cea0 R08: 00007ffe6791cee0 R09: 0000000000000000 [ 37.813747] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000320 [ 37.821026] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000000c [ 37.829653] Kernel Offset: disabled [ 37.833348] Rebooting in 86400 seconds..