git format-patch: avoid underrun when format.headers is empty or all NLs

[git.git] / object.c

diff --git a/object.c b/object.c
index 5a5ebe27b0db0506dc1a6606d30e328c53275c18..50b6528001fe4bafdfe70126dc2078860c3d1969 100644 (file)
--- a/object.c
+++ b/object.c
@@ -140,7 +140,8 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
        if (type == OBJ_BLOB) {
                struct blob *blob = lookup_blob(sha1);
                if (blob) {
-                       parse_blob_buffer(blob, buffer, size);
+                       if (parse_blob_buffer(blob, buffer, size))
+                               return NULL;
                        obj = &blob->object;
                }
        } else if (type == OBJ_TREE) {
@@ -148,14 +149,16 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
                if (tree) {
                        obj = &tree->object;
                        if (!tree->object.parsed) {
-                               parse_tree_buffer(tree, buffer, size);
+                               if (parse_tree_buffer(tree, buffer, size))
+                                       return NULL;
                                eaten = 1;
                        }
                }
        } else if (type == OBJ_COMMIT) {
                struct commit *commit = lookup_commit(sha1);
                if (commit) {
-                       parse_commit_buffer(commit, buffer, size);
+                       if (parse_commit_buffer(commit, buffer, size))
+                               return NULL;
                        if (!commit->buffer) {
                                commit->buffer = buffer;
                                eaten = 1;
@@ -165,7 +168,8 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
        } else if (type == OBJ_TAG) {
                struct tag *tag = lookup_tag(sha1);
                if (tag) {
-                       parse_tag_buffer(tag, buffer, size);
+                       if (parse_tag_buffer(tag, buffer, size))
+                              return NULL;
                        obj = &tag->object;
                }
        } else {