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-rw-r--r--git-compat-util.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index f8d46d5..8781e8e 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -202,6 +202,8 @@ static inline void *xmmap(void *start, size_t length,
{
void *ret = mmap(start, length, prot, flags, fd, offset);
if (ret == MAP_FAILED) {
+ if (!length)
+ return NULL;
release_pack_memory(length);
ret = mmap(start, length, prot, flags, fd, offset);
if (ret == MAP_FAILED)