Special case calloc and realloc with zero count or size.

1 files changed, 6 insertions, 0 deletions

diff --git a/fitz/base_memory.c b/fitz/base_memory.c
index 4153f31e..b7ebb2c9 100644
--- a/fitz/base_memory.c
+++ b/fitz/base_memory.c
@@ -19,6 +19,9 @@ fz_calloc(int count, int size)
 {
 	void *p;
 
+	if (count == 0 || size == 0)
+		return 0;
+
 	if (count > INT_MAX / size)
 	{
 		fprintf(stderr, "fatal error: out of memory (integer overflow)\n");
@@ -39,6 +42,9 @@ fz_realloc(void *p, int count, int size)
 {
 	void *np;
 
+	if (count == 0 || size == 0)
+		return p;
+
 	if (count > INT_MAX / size)
 	{
 		fprintf(stderr, "fatal error: out of memory (integer overflow)\n");