diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 76e84b8adba..6bfe6ff6544 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1401,6 +1401,13 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi, if (sanity_check_area_boundary(sbi, bh)) return 1; + if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) { + f2fs_msg(sb, KERN_INFO, + "Invalid segment count (%u)", + le32_to_cpu(raw_super->segment_count)); + return 1; + } + return 0; } @@ -1424,6 +1431,7 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); return 1; } + return 0; } diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 1a1d318f373..e020cbfe40d 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -288,6 +288,12 @@ struct f2fs_nat_block { #define SIT_VBLOCK_MAP_SIZE 64 #define SIT_ENTRY_PER_BLOCK (PAGE_CACHE_SIZE / sizeof(struct f2fs_sit_entry)) +/* + * F2FS uses 4 bytes to represent block address. As a result, supported size of + * disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments. + */ +#define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2) + /* * Note that f2fs_sit_entry->vblocks has the following bit-field information. * [15:10] : allocation type such as CURSEG_XXXX_TYPE