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-rw-r--r--sha1_file.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 97a515a07..28ad1598e 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -155,6 +155,8 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
inflateInit(&stream);
ret = inflate(&stream, 0);
+ if (ret < Z_OK)
+ return NULL;
if (sscanf(buffer, "%10s %lu", type, size) != 2)
return NULL;