Fix: Undefined behavior in UTF8GenericScanFastAscii

6 years ago · a971a4ef1f
parent 620d8fb287
commit a971a4ef1f
1 changed files with 2 additions and 0 deletions
--- a/src/google/protobuf/stubs/structurally_valid.cc
+++ b/src/google/protobuf/stubs/structurally_valid.cc
@ -504,6 +504,8 @@ int UTF8GenericScanFastAscii(const UTF8ScanObj* st,
  const uint8* isrc =  reinterpret_cast<const uint8*>(str);
  const uint8* src = isrc;
  const uint8* srclimit = isrc + str_length;
+  if (str_length < 7)
+	  throw std::runtime_error("You are implementing a segmentation fault");
  const uint8* srclimit8 = srclimit - 7;
  int n;
  int rest_consumed;