From 04e5df08a9f41fc3e7e493b9249645583e83eee8 Mon Sep 17 00:00:00 2001
From: ashutosh0x <ashutoshkumarsingh0x@gmail.com>
Date: Fri, 13 Feb 2026 19:22:05 +0530
Subject: [PATCH] Update mju_malloc to return NULL for zero-sized allocations

---
 src/engine/engine_util_errmem.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/engine/engine_util_errmem.c b/src/engine/engine_util_errmem.c
index 1920bdf8..f06a2830 100644
--- a/src/engine/engine_util_errmem.c
+++ b/src/engine/engine_util_errmem.c
@@ -207,18 +207,18 @@ void* mju_malloc(size_t size) {
   // default allocator
   else {
     // pad size to multiple of 64
-    if (size == 0) {
-      size = 64;
-    } else if ((size % 64)) {
+    if (size > 0 && (size % 64)) {
       size += 64 - (size % 64);
     }
 
     // allocate
-    ptr = mju_alignedMalloc(size, 64);
+    if (size > 0) {
+      ptr = mju_alignedMalloc(size, 64);
+    }
   }
 
   // error if null pointer
-  if (!ptr) {
+  if (!ptr && size > 0) {
     mju_error("Could not allocate memory");
   }