The following issues were found

src/google/protobuf/testing/zcgzip.cc
1 issues
read - Check buffer boundaries if used in a loop including recursive loops
Security

Line: 76 Column: 15 CWE codes: 120 20 

                      break;
      }
    } while (outlen <= 0);
    readlen = read(STDIN_FILENO, outptr, outlen);
    if (readlen <= 0) {
      out.BackUp(outlen);
      break;
    }
    if (readlen < outlen) {

Reported by FlawFinder.

src/google/protobuf/arena.cc
1 issues
There is an unknown macro here somewhere. Configuration is required. If PROTOBUF_FUNC_ALIGN is a macro then please configure it.
Error

Line: 470 

                return impl_.AllocateAligned(n, type);
}

PROTOBUF_FUNC_ALIGN(32)
std::pair<void*, internal::SerialArena::CleanupNode*>
Arena::AllocateAlignedWithCleanup(size_t n, const std::type_info* type) {
  return impl_.AllocateAlignedWithCleanup(n, type);
}

Reported by Cppcheck.

src/google/protobuf/any_test.cc
1 issues
syntax error
Error

Line: 48 

                (void)metadata;
}

TEST(AnyTest, TestPackAndUnpack) {
  protobuf_unittest::TestAny submessage;
  submessage.set_int32_value(12345);
  protobuf_unittest::TestAny message;
  ASSERT_TRUE(message.mutable_any_value()->PackFrom(submessage));

Reported by Cppcheck.

src/google/protobuf/wire_format_lite.h
1 issues
memcpy - Does not check for buffer overflows when copying to destination
Security

Line: 1464 Column: 3 CWE codes: 120
Suggestion: Make sure destination can always hold the source data 

              
  const T* ii = value.data();
  const int bytes = n * static_cast<int>(sizeof(ii[0]));
  memcpy(target, ii, static_cast<size_t>(bytes));
  return target + bytes;
#else
  return WritePrimitiveNoTagToArray(value, Writer, target);
#endif
}

Reported by FlawFinder.

src/google/protobuf/wrappers.pb.cc
1 issues
There is an unknown macro here somewhere. Configuration is required. If PROTOBUF_NAMESPACE_OPEN is a macro then please configure it.
Error

Line: 1888 

              
// @@protoc_insertion_point(namespace_scope)
PROTOBUF_NAMESPACE_CLOSE
PROTOBUF_NAMESPACE_OPEN
template<> PROTOBUF_NOINLINE ::PROTOBUF_NAMESPACE_ID::DoubleValue* Arena::CreateMaybeMessage< ::PROTOBUF_NAMESPACE_ID::DoubleValue >(Arena* arena) {
  return Arena::CreateMessageInternal< ::PROTOBUF_NAMESPACE_ID::DoubleValue >(arena);
}
template<> PROTOBUF_NOINLINE ::PROTOBUF_NAMESPACE_ID::FloatValue* Arena::CreateMaybeMessage< ::PROTOBUF_NAMESPACE_ID::FloatValue >(Arena* arena) {
  return Arena::CreateMessageInternal< ::PROTOBUF_NAMESPACE_ID::FloatValue >(arena);

Reported by Cppcheck.

src/google/protobuf/unknown_field_set_unittest.cc
1 issues
syntax error
Error

Line: 146 

                          unknown_tags.size());
}

TEST_F(UnknownFieldSetTest, Varint) {
  const UnknownField* field = GetField("optional_int32");
  ASSERT_TRUE(field != NULL);

  ASSERT_EQ(UnknownField::TYPE_VARINT, field->type());
  EXPECT_EQ(all_fields_.optional_int32(), field->varint());

Reported by Cppcheck.

src/google/protobuf/util/delimited_message_util_test.cc
1 issues
syntax error
Error

Line: 85 

                }
}

TEST(DelimitedMessageUtilTest, FailsAtEndOfStream) {
  std::stringstream full_stream;
  std::stringstream partial_stream;

  {
    protobuf_unittest::ForeignMessage message;

Reported by Cppcheck.

src/google/protobuf/util/field_comparator_test.cc
1 issues
syntax error
Error

Line: 59 

                TestAllTypes message_2_;
};

TEST_F(DefaultFieldComparatorTest, RecursesIntoGroup) {
  const FieldDescriptor* field = descriptor_->FindFieldByName("optionalgroup");
  EXPECT_EQ(FieldComparator::RECURSE,
            comparator_.Compare(message_1_, message_2_, field, -1, -1, NULL));
}

Reported by Cppcheck.

src/google/protobuf/util/field_mask_util_test.cc
1 issues
syntax error
Error

Line: 86 

                EXPECT_EQ("#FAIL#", SnakeCaseToCamelCase("foo_bar_"));
}

TEST_F(SnakeCaseCamelCaseTest, CamelToSnake) {
  EXPECT_EQ("foo_bar", CamelCaseToSnakeCase("fooBar"));
  EXPECT_EQ("_foo_bar", CamelCaseToSnakeCase("FooBar"));
  EXPECT_EQ("foo3_bar", CamelCaseToSnakeCase("foo3Bar"));
  // "_"s are not allowed.
  EXPECT_EQ("#FAIL#", CamelCaseToSnakeCase("foo_bar"));

Reported by Cppcheck.

src/google/protobuf/any.pb.cc
1 issues
There is an unknown macro here somewhere. Configuration is required. If PROTOBUF_NAMESPACE_OPEN is a macro then please configure it.
Error

Line: 333 

              
// @@protoc_insertion_point(namespace_scope)
PROTOBUF_NAMESPACE_CLOSE
PROTOBUF_NAMESPACE_OPEN
template<> PROTOBUF_NOINLINE ::PROTOBUF_NAMESPACE_ID::Any* Arena::CreateMaybeMessage< ::PROTOBUF_NAMESPACE_ID::Any >(Arena* arena) {
  return Arena::CreateMessageInternal< ::PROTOBUF_NAMESPACE_ID::Any >(arena);
}
PROTOBUF_NAMESPACE_CLOSE

Reported by Cppcheck.