1 files changed, 3 insertions, 3 deletions

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 547c165299c0..92e9a7489174 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1203,13 +1203,13 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
                           unsigned int count)
 {
         if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
-            (start_blk + count < start_blk) ||
-            (start_blk > le32_to_cpu(sbi->s_es->s_blocks_count)))
+            (start_blk + count - 1 < start_blk) ||
+            (start_blk + count - 1 >= le32_to_cpu(sbi->s_es->s_blocks_count)))
                 return 0;
 
         /* Ensure we do not step over superblock */
         if ((start_blk <= sbi->s_sb_block) &&
-            (start_blk + count >= sbi->s_sb_block))
+            (start_blk + count - 1 >= sbi->s_sb_block))
                 return 0;
 
         return 1;