Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.726408] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 35.733604] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 35.744043] F2FS-fs (loop0): invalid crc value [ 35.783790] F2FS-fs (loop0): access invalid blkaddr:1024 [ 35.789308] ------------[ cut here ]------------ [ 35.794255] WARNING: CPU: 0 PID: 8097 at fs/f2fs/checkpoint.c:166 f2fs_is_valid_blkaddr+0x35d/0xa20 [ 35.803433] Kernel panic - not syncing: panic_on_warn set ... [ 35.803433] [ 35.810790] CPU: 0 PID: 8097 Comm: syz-executor782 Not tainted 4.19.211-syzkaller #0 [ 35.818653] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.828008] Call Trace: [ 35.830604] dump_stack+0x1fc/0x2ef [ 35.834228] panic+0x26a/0x50e [ 35.837401] ? __warn_printk+0xf3/0xf3 [ 35.841272] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 35.846011] ? __probe_kernel_read+0x130/0x1b0 [ 35.850572] ? __warn.cold+0x5/0x5a [ 35.854178] ? __warn+0xe4/0x200 [ 35.857529] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 35.862329] __warn.cold+0x20/0x5a [ 35.865852] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 35.870608] report_bug+0x262/0x2b0 [ 35.874219] do_error_trap+0x1d7/0x310 [ 35.878132] ? math_error+0x310/0x310 [ 35.881911] ? irq_work_claim+0xa6/0xc0 [ 35.885864] ? irq_work_queue+0x29/0x80 [ 35.889824] ? error_entry+0x72/0xd0 [ 35.893519] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.898521] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.903347] invalid_op+0x14/0x20 [ 35.906787] RIP: 0010:f2fs_is_valid_blkaddr+0x35d/0xa20 [ 35.912135] Code: 7a 06 00 00 48 8b 7d 00 44 89 e1 48 c7 c2 40 1a a8 88 48 c7 c6 e0 18 a8 88 e8 bf fa fd ff 48 c7 c7 80 1a a8 88 e8 fe 34 de 04 <0f> 0b 45 31 ed e9 3f fe ff ff e8 84 03 4d fe 48 8d bd 40 01 00 00 [ 35.931032] RSP: 0018:ffff8880b38e7740 EFLAGS: 00010282 [ 35.936403] RAX: 0000000000000024 RBX: 0000000000000005 RCX: 0000000000000000 [ 35.943667] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101671ceda [ 35.950930] RBP: ffff888095290200 R08: 0000000000000024 R09: 0000000000000000 [ 35.958274] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000400 [ 35.965534] R13: 0000000000000001 R14: 0000000000001000 R15: 0000000000000200 [ 35.972891] ? vprintk_func+0x81/0x180 [ 35.976772] f2fs_submit_page_bio+0x138/0x1580 [ 35.981339] ? page_cache_tree_insert+0x3f0/0x3f0 [ 35.986164] ? check_preemption_disabled+0x41/0x280 [ 35.991180] read_node_page+0x496/0x630 [ 35.995141] ? truncate_node+0x10c0/0x10c0 [ 35.999359] ? add_to_page_cache_lru+0x259/0x680 [ 36.004102] ? add_to_page_cache_locked+0x40/0x40 [ 36.008956] ? pagecache_get_page+0x1c4/0xd50 [ 36.013434] __get_node_page.part.0+0x9b/0x14b0 [ 36.018085] f2fs_get_node_page+0x109/0x1a0 [ 36.022395] f2fs_iget+0x22a/0x4ce0 [ 36.026016] ? wait_for_completion_io+0x10/0x10 [ 36.030670] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 36.035673] f2fs_fill_super+0x34b4/0x7050 [ 36.039900] ? snprintf+0xbb/0xf0 [ 36.043357] ? f2fs_commit_super+0x400/0x400 [ 36.047747] ? wait_for_completion_io+0x10/0x10 [ 36.052398] ? set_blocksize+0x163/0x3f0 [ 36.056439] mount_bdev+0x2fc/0x3b0 [ 36.060134] ? f2fs_commit_super+0x400/0x400 [ 36.064526] mount_fs+0xa3/0x310 [ 36.067894] vfs_kern_mount.part.0+0x68/0x470 [ 36.072370] do_mount+0x115c/0x2f50 [ 36.075980] ? cmp_ex_sort+0xc0/0xc0 [ 36.079763] ? __do_page_fault+0x180/0xd60 [ 36.083989] ? copy_mount_string+0x40/0x40 [ 36.088206] ? copy_mount_options+0x1cd/0x380 [ 36.092682] ? memset+0x20/0x40 [ 36.095949] ? copy_mount_options+0x26f/0x380 [ 36.100456] ksys_mount+0xcf/0x130 [ 36.103984] __x64_sys_mount+0xba/0x150 [ 36.107944] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.112507] do_syscall_64+0xf9/0x620 [ 36.116292] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.121463] RIP: 0033:0x7fa31b5e6e1a [ 36.125156] 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 [ 36.144053] RSP: 002b:00007ffdba855108 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 36.151747] RAX: ffffffffffffffda RBX: 00007ffdba855160 RCX: 00007fa31b5e6e1a [ 36.159009] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdba855120 [ 36.166258] RBP: 00007ffdba855120 R08: 00007ffdba855160 R09: 0000000000000000 [ 36.173508] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200008f0 [ 36.180783] R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000004a [ 36.188417] Kernel Offset: disabled [ 36.192147] Rebooting in 86400 seconds..