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-rw-r--r--sha1_file.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/sha1_file.c b/sha1_file.c
index aa09b4646a..d8ef565561 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -804,10 +804,12 @@ static int packed_delta_info(unsigned char *base_sha1,
                  * the result size.
                  */
                 data = delta_head;
-                get_delta_hdr_size(&data); /* ignore base size */
+
+                /* ignore base size */
+                get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
 
                 /* Read the result size */
-                result_size = get_delta_hdr_size(&data);
+                result_size = get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
                 *sizep = result_size;
         }
         return 0;