diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 14bf440ea4df..07cd3b4aa9cb 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1492,6 +1492,14 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 		goto bail;
 	}
 
+	if (le16_to_cpu(di->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT &&
+	    (u32)le16_to_cpu(di->i_suballoc_slot) > OCFS2_SB(sb)->max_slots - 1) {
+		rc = ocfs2_error(sb, "Invalid dinode %llu: suballoc slot %u\n",
+				 (unsigned long long)bh->b_blocknr,
+				 le16_to_cpu(di->i_suballoc_slot));
+		goto bail;
+	}
+
 	rc = 0;
 
 bail: