mirror of
https://github.com/webmproject/libwebp.git
synced 2026-04-09 14:22:31 +02:00
c696aadf69
This fixes a spurious unsigned integer overflow with invalid content: ``` src/dec/alpha_dec.c:61:44: runtime error: unsigned integer overflow: 0 - 1 cannot be represented in type 'size_t' (aka 'unsigned long') ``` Bug: 498965803, 498966235, 498966511, 498967090 Change-Id: I350d9144d0c1e4e35286e9e1ca68a574ff6f86a1
118 lines
4.2 KiB
C++
118 lines
4.2 KiB
C++
// Copyright 2018 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <cstdlib>
|
|
#include <string>
|
|
#include <string_view>
|
|
|
|
#include "./fuzz_utils.h"
|
|
#include "gtest/gtest.h"
|
|
#include "webp/decode.h"
|
|
#include "webp/types.h"
|
|
|
|
namespace {
|
|
|
|
void SimpleApiTest(std::string_view data_in) {
|
|
const uint8_t* const data = reinterpret_cast<const uint8_t*>(data_in.data());
|
|
const size_t size = data_in.size();
|
|
int w, h;
|
|
if (!WebPGetInfo(data, size, &w, &h)) return;
|
|
if ((size_t)w * h > fuzz_utils::kFuzzPxLimit) return;
|
|
|
|
const uint8_t value = fuzz_utils::FuzzHash(data, size);
|
|
uint8_t* buf = NULL;
|
|
|
|
// For *Into functions, which decode into an external buffer, an
|
|
// intentionally too small buffer can be given with low probability.
|
|
if (value < 0x16) {
|
|
buf = WebPDecodeRGBA(data, size, &w, &h);
|
|
} else if (value < 0x2b) {
|
|
buf = WebPDecodeBGRA(data, size, &w, &h);
|
|
#if !defined(WEBP_REDUCE_CSP)
|
|
} else if (value < 0x40) {
|
|
buf = WebPDecodeARGB(data, size, &w, &h);
|
|
} else if (value < 0x55) {
|
|
buf = WebPDecodeRGB(data, size, &w, &h);
|
|
} else if (value < 0x6a) {
|
|
buf = WebPDecodeBGR(data, size, &w, &h);
|
|
#endif // !defined(WEBP_REDUCE_CSP)
|
|
} else if (value < 0x7f) {
|
|
uint8_t *u, *v;
|
|
int stride, uv_stride;
|
|
buf = WebPDecodeYUV(data, size, &w, &h, &u, &v, &stride, &uv_stride);
|
|
} else if (value < 0xe8) {
|
|
const int stride = (value < 0xbe ? 4 : 3) * w;
|
|
size_t buf_size = stride * h;
|
|
if (value % 0x10 == 0) buf_size--;
|
|
uint8_t* const ext_buf = (uint8_t*)malloc(buf_size);
|
|
if (value < 0x94) {
|
|
(void)WebPDecodeRGBAInto(data, size, ext_buf, buf_size, stride);
|
|
#if !defined(WEBP_REDUCE_CSP)
|
|
} else if (value < 0xa9) {
|
|
(void)WebPDecodeARGBInto(data, size, ext_buf, buf_size, stride);
|
|
} else if (value < 0xbe) {
|
|
(void)WebPDecodeBGRInto(data, size, ext_buf, buf_size, stride);
|
|
} else if (value < 0xd3) {
|
|
(void)WebPDecodeRGBInto(data, size, ext_buf, buf_size, stride);
|
|
#endif // !defined(WEBP_REDUCE_CSP)
|
|
} else {
|
|
(void)WebPDecodeBGRAInto(data, size, ext_buf, buf_size, stride);
|
|
}
|
|
free(ext_buf);
|
|
} else {
|
|
size_t luma_size = w * h;
|
|
const int uv_stride = (w + 1) / 2;
|
|
size_t u_size = uv_stride * (h + 1) / 2;
|
|
size_t v_size = uv_stride * (h + 1) / 2;
|
|
if (value % 0x10 == 0) {
|
|
if (size & 1) luma_size--;
|
|
if (size & 2) u_size--;
|
|
if (size & 4) v_size--;
|
|
}
|
|
uint8_t* const luma_buf = (uint8_t*)malloc(luma_size);
|
|
uint8_t* const u_buf = (uint8_t*)malloc(u_size);
|
|
uint8_t* const v_buf = (uint8_t*)malloc(v_size);
|
|
(void)WebPDecodeYUVInto(data, size, luma_buf, luma_size,
|
|
w /* luma_stride */, u_buf, u_size, uv_stride,
|
|
v_buf, v_size, uv_stride);
|
|
free(luma_buf);
|
|
free(u_buf);
|
|
free(v_buf);
|
|
}
|
|
|
|
if (buf) WebPFree(buf);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
FUZZ_TEST(SimpleApi, SimpleApiTest)
|
|
.WithDomains(fuzztest::String().WithMaxSize(fuzz_utils::kMaxWebPFileSize +
|
|
1));
|
|
|
|
TEST(SimpleApi, Buganizer498966511) {
|
|
SimpleApiTest(
|
|
std::string("ALPH\004\000\000\000A\377\377\377\377LP\010\000\000\000\000"
|
|
"\000\000\311H\006\000\000\000\"E\356PW\"ALPH\000\000\000\000"
|
|
"ALpH\004\000\000\000\004\010\000\200VP8 "
|
|
"T\000\000\000\266\003\000\235\001*"
|
|
"\001\000\002\000y\336n\366\001O\363\374\243\000\003LPS\"\002"
|
|
"iF\000FjRsa\232vP\"EO\"K\217OM;rOect\275n\"Wsection_JUNQ="
|
|
"\"JUNQ\"\250YO,_I\362\021\"ANIM\"",
|
|
150));
|
|
}
|