Only in busybox-0.60.1+/libbb: tags
diff -ur busybox-0.60.1/libbb/xfuncs.c busybox-0.60.1+/libbb/xfuncs.c
--- busybox-0.60.1/libbb/xfuncs.c	Thu Jun 28 23:22:19 2001
+++ busybox-0.60.1+/libbb/xfuncs.c	Sun Oct 28 15:56:08 2001
@@ -35,7 +35,12 @@
 #ifndef DMALLOC
 extern void *xmalloc(size_t size)
 {
-	void *ptr = malloc(size);
+	void *ptr;
+
+	if (size == 0)
+		size++;
+		
+	ptr = malloc(size);
 
 	if (!ptr)
 		error_msg_and_die(memory_exhausted);
@@ -54,6 +59,9 @@
 		return NULL;
 	}
 
+	if (size == 0)
+		size++;
+
 	ptr = realloc(old, size);
 	if (!ptr)
 		error_msg_and_die(memory_exhausted);
@@ -62,9 +70,18 @@
 
 extern void *xcalloc(size_t nmemb, size_t size)
 {
-	void *ptr = calloc(nmemb, size);
+	void *ptr;
+	
+	if (nmemb == 0)
+		nmemb++;
+		
+	if (size == 0)
+		size++;
+		
+	ptr = calloc(nmemb, size);
 	if (!ptr)
 		error_msg_and_die(memory_exhausted);
+		
 	return ptr;
 }