[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.530686] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 33.537999] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 33.547997] F2FS-fs (loop0): invalid crc value [ 33.589050] F2FS-fs (loop0): access invalid blkaddr:1 [ 33.594454] ------------[ cut here ]------------ [ 33.600670] WARNING: CPU: 0 PID: 8076 at fs/f2fs/checkpoint.c:166 f2fs_is_valid_blkaddr+0x35d/0xa20 [ 33.610026] Kernel panic - not syncing: panic_on_warn set ... [ 33.610026] [ 33.617385] CPU: 0 PID: 8076 Comm: syz-executor732 Not tainted 4.19.195-syzkaller #0 [ 33.625327] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.634771] Call Trace: [ 33.637351] dump_stack+0x1fc/0x2ef [ 33.640969] panic+0x26a/0x50e [ 33.644141] ? __warn_printk+0xf3/0xf3 [ 33.648024] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 33.652775] ? __probe_kernel_read+0x130/0x1b0 [ 33.657337] ? __warn.cold+0x5/0x5a [ 33.660942] ? __warn+0xe4/0x200 [ 33.664288] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 33.669026] __warn.cold+0x20/0x5a [ 33.672565] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 33.677304] report_bug+0x262/0x2b0 [ 33.680949] do_error_trap+0x1d7/0x310 [ 33.684831] ? math_error+0x310/0x310 [ 33.688632] ? __irq_work_queue_local+0x101/0x160 [ 33.693460] ? irq_work_queue+0x29/0x80 [ 33.697505] ? error_entry+0x72/0xd0 [ 33.701201] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.706200] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.711110] invalid_op+0x14/0x20 [ 33.714553] RIP: 0010:f2fs_is_valid_blkaddr+0x35d/0xa20 [ 33.719900] 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 99 65 dd 04 <0f> 0b 45 31 ed e9 3f fe ff ff e8 c4 0d 4d fe 48 8d bd 40 01 00 00 [ 33.738783] RSP: 0018:ffff8880a205f740 EFLAGS: 00010282 [ 33.744126] RAX: 0000000000000024 RBX: 0000000000000005 RCX: 0000000000000000 [ 33.751376] RDX: 0000000000000000 RSI: ffffffff814dfc91 RDI: ffffed101440beda [ 33.758692] RBP: ffff8880a214dc80 R08: 0000000000000024 R09: 0000000000000000 [ 33.765945] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 33.773364] R13: 0000000000000001 R14: 0000000000001400 R15: 0000000000000400 [ 33.780641] ? vprintk_func+0x81/0x180 [ 33.784517] f2fs_submit_page_bio+0x138/0x1580 [ 33.789081] ? page_cache_tree_insert+0x3f0/0x3f0 [ 33.793913] ? check_preemption_disabled+0x41/0x280 [ 33.798920] read_node_page+0x496/0x630 [ 33.802879] ? truncate_node+0x10c0/0x10c0 [ 33.807551] ? add_to_page_cache_lru+0x259/0x680 [ 33.812308] ? add_to_page_cache_locked+0x40/0x40 [ 33.817141] ? pagecache_get_page+0x1c4/0xd50 [ 33.821625] __get_node_page.part.0+0x9b/0x14b0 [ 33.826285] f2fs_get_node_page+0x109/0x1a0 [ 33.830587] f2fs_iget+0x22a/0x4ce0 [ 33.834198] ? wait_for_completion_io+0x10/0x10 [ 33.838876] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.843918] f2fs_fill_super+0x34b4/0x7050 [ 33.848178] ? snprintf+0xbb/0xf0 [ 33.851618] ? f2fs_commit_super+0x400/0x400 [ 33.856019] ? wait_for_completion_io+0x10/0x10 [ 33.860687] ? set_blocksize+0x163/0x3f0 [ 33.864746] mount_bdev+0x2fc/0x3b0 [ 33.868455] ? f2fs_commit_super+0x400/0x400 [ 33.872849] mount_fs+0xa3/0x310 [ 33.876224] vfs_kern_mount.part.0+0x68/0x470 [ 33.880701] do_mount+0x113c/0x2f10 [ 33.884330] ? cmp_ex_sort+0xc0/0xc0 [ 33.888036] ? __do_page_fault+0x180/0xd60 [ 33.892259] ? copy_mount_string+0x40/0x40 [ 33.896480] ? copy_mount_options+0x1cd/0x380 [ 33.901048] ? memset+0x20/0x40 [ 33.904415] ? copy_mount_options+0x26f/0x380 [ 33.908959] ksys_mount+0xcf/0x130 [ 33.912481] __x64_sys_mount+0xba/0x150 [ 33.916561] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.921161] do_syscall_64+0xf9/0x620 [ 33.924972] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.930233] RIP: 0033:0x4458ba [ 33.933428] 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 [ 33.952397] RSP: 002b:00007ffe028d8358 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 33.960094] RAX: ffffffffffffffda RBX: 00007ffe028d83b0 RCX: 00000000004458ba [ 33.967436] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe028d8370 [ 33.974692] RBP: 00007ffe028d8370 R08: 00007ffe028d83b0 R09: 0000000000000000 [ 33.981942] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000698 [ 33.989193] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000031 [ 33.998052] Kernel Offset: disabled [ 34.001709] Rebooting in 86400 seconds..