From e5509e36d64f315efd5395b9d22113b1c5e2c1a7 Mon Sep 17 00:00:00 2001
From: yang-g <yangg@google.com>
Date: Mon, 25 Feb 2019 16:08:45 -0800
Subject: [PATCH] Prevent overflow

---
 src/core/ext/transport/chttp2/transport/hpack_parser.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.cc b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
index ccf2256974a..7b47c9bc18e 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
@@ -1452,7 +1452,7 @@ static grpc_error* begin_parse_string(grpc_chttp2_hpack_parser* p,
                                       uint8_t binary,
                                       grpc_chttp2_hpack_parser_string* str) {
   if (!p->huff && binary == NOT_BINARY &&
-      (end - cur) >= static_cast<intptr_t>(p->strlen) &&
+      static_cast<uint32_t>(end - cur) >= p->strlen &&
       p->current_slice_refcount != nullptr) {
     GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
     str->copied = false;