f2fs: sanity check checkpoint segno and blkoff
Make sure segno and blkoff read from raw image are valid.
FPIIM-1400
Change-Id: I1342ab0ff432b19f11c11c9448a997badf7554c4
diff --git a/fsck/mount.c b/fsck/mount.c
index 6d96db8..070a6cc 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -445,6 +445,8 @@
unsigned int total, fsmeta;
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned int main_segs, blocks_per_seg;
+ int i;
total = le32_to_cpu(raw_super->segment_count);
fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
@@ -456,6 +458,22 @@
if (fsmeta >= total)
return 1;
+ main_segs = le32_to_cpu(sbi->raw_super->segment_count_main);
+ blocks_per_seg = sbi->blocks_per_seg;
+
+ for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
+ if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
+ le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg) {
+ return 1;
+ }
+ }
+ for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
+ if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
+ le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg) {
+ return 1;
+ }
+ }
+
return 0;
}