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-rw-r--r--compat/mmap.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/compat/mmap.c b/compat/mmap.c
index 14d31010df..8d6c02d4bc 100644
--- a/compat/mmap.c
+++ b/compat/mmap.c
@@ -7,7 +7,12 @@ void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t of
if (start != NULL || flags != MAP_PRIVATE || prot != PROT_READ)
die("Invalid usage of mmap when built with NO_MMAP");
- start = xmalloc(length);
+ if (length == 0) {
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+
+ start = malloc(length);
if (start == NULL) {
errno = ENOMEM;
return MAP_FAILED;