[PATCH] commit-graph: fix memory leak

[Josh Steadmon]

Free the commit graph when verify_commit_graph_lite() reports an error.
Credit to OSS-Fuzz for finding this leak.

Signed-off-by: Josh Steadmon <stead...@google.com>
---
 commit-graph.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/commit-graph.c b/commit-graph.c
index 66865acbd7..4bce70d35c 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -267,8 +267,10 @@ struct commit_graph *parse_commit_graph(void *graph_map, 
int fd,
                last_chunk_offset = chunk_offset;
        }
 
-       if (verify_commit_graph_lite(graph))
+       if (verify_commit_graph_lite(graph)) {
+               free(graph);
                return NULL;
+       }
 
        return graph;
 }
-- 
2.21.0.1020.gf2820cf01a-goog