Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.012278] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 34.019683] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 34.029809] F2FS-fs (loop0): invalid crc value [ 34.070000] F2FS-fs (loop0): access invalid blkaddr:1 [ 34.075336] ------------[ cut here ]------------ [ 34.080276] WARNING: CPU: 1 PID: 8119 at fs/f2fs/checkpoint.c:166 f2fs_is_valid_blkaddr+0x35d/0xa20 [ 34.089534] Kernel panic - not syncing: panic_on_warn set ... [ 34.089534] [ 34.096886] CPU: 1 PID: 8119 Comm: syz-executor123 Not tainted 4.19.211-syzkaller #0 [ 34.104746] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 34.114111] Call Trace: [ 34.116703] dump_stack+0x1fc/0x2ef [ 34.120315] panic+0x26a/0x50e [ 34.123495] ? __warn_printk+0xf3/0xf3 [ 34.127472] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 34.132212] ? __probe_kernel_read+0x130/0x1b0 [ 34.136802] ? __warn.cold+0x5/0x5a [ 34.140413] ? __warn+0xe4/0x200 [ 34.143767] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 34.148507] __warn.cold+0x20/0x5a [ 34.152038] ? f2fs_is_valid_blkaddr+0x35d/0xa20 [ 34.156779] report_bug+0x262/0x2b0 [ 34.160406] do_error_trap+0x1d7/0x310 [ 34.164284] ? math_error+0x310/0x310 [ 34.168068] ? irq_work_claim+0xa6/0xc0 [ 34.172029] ? irq_work_queue+0x29/0x80 [ 34.176013] ? error_entry+0x72/0xd0 [ 34.179713] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.184737] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.189586] invalid_op+0x14/0x20 [ 34.193052] RIP: 0010:f2fs_is_valid_blkaddr+0x35d/0xa20 [ 34.198401] 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 [ 34.217286] RSP: 0018:ffff88809434f740 EFLAGS: 00010282 [ 34.222650] RAX: 0000000000000024 RBX: 0000000000000005 RCX: 0000000000000000 [ 34.229902] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012869eda [ 34.237153] RBP: ffff88809c80c140 R08: 0000000000000024 R09: 0000000000000000 [ 34.244404] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 34.251654] R13: 0000000000000001 R14: 0000000000001400 R15: 0000000000000400 [ 34.258916] ? vprintk_func+0x81/0x180 [ 34.262813] f2fs_submit_page_bio+0x138/0x1580 [ 34.267384] ? page_cache_tree_insert+0x3f0/0x3f0 [ 34.272215] ? check_preemption_disabled+0x41/0x280 [ 34.277221] read_node_page+0x496/0x630 [ 34.281179] ? truncate_node+0x10c0/0x10c0 [ 34.285418] ? add_to_page_cache_lru+0x259/0x680 [ 34.290158] ? add_to_page_cache_locked+0x40/0x40 [ 34.295517] ? pagecache_get_page+0x1c4/0xd50 [ 34.299999] __get_node_page.part.0+0x9b/0x14b0 [ 34.304654] f2fs_get_node_page+0x109/0x1a0 [ 34.308964] f2fs_iget+0x22a/0x4ce0 [ 34.312596] ? wait_for_completion_io+0x10/0x10 [ 34.317746] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.323827] f2fs_fill_super+0x34b4/0x7050 [ 34.328065] ? snprintf+0xbb/0xf0 [ 34.331506] ? f2fs_commit_super+0x400/0x400 [ 34.335903] ? wait_for_completion_io+0x10/0x10 [ 34.340564] ? set_blocksize+0x163/0x3f0 [ 34.344615] mount_bdev+0x2fc/0x3b0 [ 34.348230] ? f2fs_commit_super+0x400/0x400 [ 34.352624] mount_fs+0xa3/0x310 [ 34.355979] vfs_kern_mount.part.0+0x68/0x470 [ 34.360460] do_mount+0x115c/0x2f50 [ 34.364079] ? cmp_ex_sort+0xc0/0xc0 [ 34.367798] ? __do_page_fault+0x180/0xd60 [ 34.372054] ? copy_mount_string+0x40/0x40 [ 34.376285] ? copy_mount_options+0x1cd/0x380 [ 34.380771] ? memset+0x20/0x40 [ 34.384047] ? copy_mount_options+0x26f/0x380 [ 34.388658] ksys_mount+0xcf/0x130 [ 34.392792] __x64_sys_mount+0xba/0x150 [ 34.396762] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.401335] do_syscall_64+0xf9/0x620 [ 34.405125] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.410306] RIP: 0033:0x7fd311a97a7a [ 34.414019] 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 [ 34.432912] RSP: 002b:00007ffccb965268 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 34.440607] RAX: ffffffffffffffda RBX: 00007ffccb9652c0 RCX: 00007fd311a97a7a [ 34.447861] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffccb965280 [ 34.455124] RBP: 00007ffccb965280 R08: 00007ffccb9652c0 R09: 0000000000000000 [ 34.462396] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200006b0 [ 34.469662] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000032 [ 34.477129] Kernel Offset: disabled [ 34.480783] Rebooting in 86400 seconds..