From 50cdcab49d539e4703018185992abf3214088e85 Mon Sep 17 00:00:00 2001
From: Pei-Hsuan Hung <afcidk@gmail.com>
Date: Mon, 14 Jun 2021 10:32:44 +0800
Subject: [PATCH] Fix potential fault at createDoubleObject

Resolves #963.

Add additional check to `hi_malloc` for `r->str` when len equals to
SIZE_MAX.
---
 hiredis.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hiredis.c b/hiredis.c
index 7e7af82..ba77a77 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -221,6 +221,9 @@ static void *createIntegerObject(const redisReadTask *task, long long value) {
 static void *createDoubleObject(const redisReadTask *task, double value, char *str, size_t len) {
     redisReply *r, *parent;
 
+    if (len == SIZE_MAX) // Prevents hi_malloc(0) if len equals to SIZE_MAX
+        return NULL;
+
     r = createReplyObject(REDIS_REPLY_DOUBLE);
     if (r == NULL)
         return NULL;