Fix an off by 1 error in the Linux Breakpad guid....

chrome/browser/renderer_host/render_crash_handler_host_linux.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_crash_handler_host_linux.h"
 
 #include <dirent.h>
 #include <stdint.h>
 #include <string.h>
 #include <sys/socket.h>
@@ skipping 317 matching lines @@
   memset(&msg, 0, sizeof(msg));
   struct iovec done_iov;
   done_iov.iov_base = const_cast<char*>("\x42");
   done_iov.iov_len = 1;
   msg.msg_iov = &done_iov;
   msg.msg_iovlen = 1;
 
   HANDLE_EINTR(sendmsg(signal_fd, &msg, MSG_DONTWAIT | MSG_NOSIGNAL));
   HANDLE_EINTR(close(signal_fd));
 
+  // Sanitize the string data a bit more
+  guid[kGuidSize] = crash_url[kMaxActiveURLSize] = distro[kDistroSize] = 0;
+
   BreakpadInfo info;
   info.filename = minidump_filename.c_str();
   info.process_type = "renderer";
   info.process_type_length = 8;
   info.crash_url = crash_url;
   info.crash_url_length = strlen(crash_url);
   info.guid = guid;
   info.guid_length = strlen(guid);
   info.distro = distro;
   info.distro_length = strlen(distro);
   info.upload = upload;
   HandleCrashDump(info);
 }
 
 void RenderCrashHandlerHostLinux::WillDestroyCurrentMessageLoop() {
   file_descriptor_watcher_.StopWatchingFileDescriptor();
 }