1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "CodecPriv.h"
9 #include "SkBitmap.h"
10 #include "SkCanvas.h"
11 #include "SkImageInfo.h"
12 #include "SkSurface.h"
13 #include "Test.h"
14
15 // A 20x1 image with 8 bits per pixel and a palette size of 2. Pixel values are 255, 254... Run
16 // this test with ASAN to make sure we don't try to access before/after any palette-sized buffers.
17 unsigned char gPng[] = {
18 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
19 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x01,
20 0x08, 0x03, 0x00, 0x00, 0x00, 0xe9, 0x4c, 0x7e, 0x17, 0x00, 0x00, 0x00,
21 0x09, 0x70, 0x48, 0x59, 0x73, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00,
22 0x1c, 0x00, 0x0f, 0x01, 0xb9, 0x8f, 0x00, 0x00, 0x00, 0x06, 0x50, 0x4c,
23 0x54, 0x45, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa5, 0x67, 0xb9, 0xcf,
24 0x00, 0x00, 0x00, 0x20, 0x49, 0x44, 0x41, 0x54, 0x78, 0xda, 0xed, 0xfd,
25 0x07, 0x01, 0x00, 0x20, 0x08, 0x00, 0x41, 0xbc, 0x5b, 0xe8, 0xdf, 0x97,
26 0x99, 0xe3, 0x92, 0xa0, 0xf2, 0xdf, 0x3d, 0x7b, 0x0d, 0xda, 0x04, 0x1c,
27 0x03, 0xad, 0x00, 0x38, 0x5c, 0x2e, 0xad, 0x12, 0x00, 0x00, 0x00, 0x00,
28 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
29 };
30
DEF_TEST(IndexedPngOverflow,reporter)31 DEF_TEST(IndexedPngOverflow, reporter) {
32 SkBitmap image;
33 bool success = decode_memory(gPng, sizeof(gPng), &image);
34 REPORTER_ASSERT(reporter, success);
35
36 auto surface(SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(20, 1)));
37 SkCanvas* canvas = surface->getCanvas();
38 SkRect destRect = SkRect::MakeXYWH(0, 0, 20, 1);
39 canvas->drawBitmapRect(image, destRect, nullptr);
40 }
41