malloc(0) can return 0 (Fix jqlang#2003)

nicowilliams · Jan 3, 2020 · 7041b82 · 7041b82
1 parent fb105da
commit 7041b82
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/src/jv_alloc.c b/src/jv_alloc.c
@@ -120,7 +120,7 @@ static void memory_exhausted() {
 
 void* jv_mem_alloc(size_t sz) {
   void* p = malloc(sz);
-  if (!p) {
+  if (!p && sz) {
     memory_exhausted();
   }
   return p;
@@ -132,7 +132,7 @@ void* jv_mem_alloc_unguarded(size_t sz) {
 
 void* jv_mem_calloc(size_t nemb, size_t sz) {
   void* p = calloc(nemb, sz);
-  if (!p) {
+  if (!p && sz) {
     memory_exhausted();
   }
   return p;
@@ -160,7 +160,7 @@ void jv_mem_free(void* p) {
 
 void* jv_mem_realloc(void* p, size_t sz) {
   p = realloc(p, sz);
-  if (!p) {
+  if (!p && sz) {
     memory_exhausted();
   }
   return p;