From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Fri, 11 Sep 2015 21:41:30 +0000 (+0000)
Subject: compiler: Avoid unsafe memcmp for nointerface comments.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8500ff57774af2a6b3a08464a735f837a917b677;p=gcc.git

compiler: Avoid unsafe memcmp for nointerface comments.


    Fixes golang/go#11577.

    Reviewed-on: https://go-review.googlesource.com/14182

From-SVN: r227699
---

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 6c22440c234..ef21b544a5f 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-352617bfe0a880febf5d2a87e89ea439c742ba18
+aea4360ca9c37f8e929f177ae7e42593ee62aa79
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/lex.cc b/gcc/go/gofrontend/lex.cc
index 67f78034266..98d98da74ec 100644
--- a/gcc/go/gofrontend/lex.cc
+++ b/gcc/go/gofrontend/lex.cc
@@ -1752,7 +1752,9 @@ Lex::skip_cpp_comment()
   // For field tracking analysis: a //go:nointerface comment means
   // that the next interface method should not be stored in the type
   // descriptor.  This permits it to be discarded if it is not needed.
-  if (this->lineoff_ == 2 && memcmp(p, "go:nointerface", 14) == 0)
+  if (this->lineoff_ == 2
+      && pend - p > 14
+      && memcmp(p, "go:nointerface", 14) == 0)
     this->saw_nointerface_ = true;
 
   while (p < pend)