From 2138362443493cffc919f37e3a0045cb6521dccd Mon Sep 17 00:00:00 2001
From: Zhouyihai Ding <ddyihai@google.com>
Date: Tue, 23 Jan 2018 20:50:06 -0800
Subject: [PATCH] php: fix channel_credentials hashstr leak

---
 src/php/ext/grpc/channel_credentials.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/php/ext/grpc/channel_credentials.c b/src/php/ext/grpc/channel_credentials.c
index ed74b991bd9..6ae21eac62d 100644
--- a/src/php/ext/grpc/channel_credentials.c
+++ b/src/php/ext/grpc/channel_credentials.c
@@ -57,6 +57,10 @@ static grpc_ssl_roots_override_result get_ssl_roots_override(
 
 /* Frees and destroys an instance of wrapped_grpc_channel_credentials */
 PHP_GRPC_FREE_WRAPPED_FUNC_START(wrapped_grpc_channel_credentials)
+  if (p->hashstr != NULL) {
+    free(p->hashstr);
+    p->hashstr = NULL;
+  }
   if (p->wrapped != NULL) {
     grpc_channel_credentials_release(p->wrapped);
     p->wrapped = NULL;