diff options
| -rw-r--r-- | fs/f2fs/super.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index b8e160b17505..61222a586c46 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1140,6 +1140,8 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) unsigned int sit_segs, nat_segs; unsigned int sit_bitmap_size, nat_bitmap_size; unsigned int log_blocks_per_seg; + unsigned int segment_count_main; + block_t user_block_count; int i; total = le32_to_cpu(raw_super->segment_count); @@ -1164,6 +1166,16 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) return 1; } + user_block_count = le64_to_cpu(ckpt->user_block_count); + segment_count_main = le32_to_cpu(raw_super->segment_count_main); + log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); + if (!user_block_count || user_block_count >= + segment_count_main << log_blocks_per_seg) { + f2fs_msg(sbi->sb, KERN_ERR, + "Wrong user_block_count: %u", user_block_count); + return 1; + } + main_segs = le32_to_cpu(raw_super->segment_count_main); blocks_per_seg = sbi->blocks_per_seg; @@ -1180,7 +1192,6 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); - log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 || nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) { |