1 /*
2 * Copyright (C)2021 D. R. Commander. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of the libjpeg-turbo Project nor the names of its
13 * contributors may be used to endorse or promote products derived from this
14 * software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <turbojpeg.h>
30 #include <stdlib.h>
31 #include <stdint.h>
32
33
34 #define NUMPF 4
35
36
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)37 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
38 {
39 tjhandle handle = NULL;
40 unsigned char *dstBuf = NULL;
41 int width = 0, height = 0, jpegSubsamp, jpegColorspace, pfi;
42 /* TJPF_RGB-TJPF_BGR share the same code paths, as do TJPF_RGBX-TJPF_XRGB and
43 TJPF_RGBA-TJPF_ARGB. Thus, the pixel formats below should be the minimum
44 necessary to achieve full coverage. */
45 enum TJPF pixelFormats[NUMPF] =
46 { TJPF_RGB, TJPF_BGRX, TJPF_GRAY, TJPF_CMYK };
47 #if defined(__has_feature) && __has_feature(memory_sanitizer)
48 char env[18] = "JSIMD_FORCENONE=1";
49
50 /* The libjpeg-turbo SIMD extensions produce false positives with
51 MemorySanitizer. */
52 putenv(env);
53 #endif
54
55 if ((handle = tjInitDecompress()) == NULL)
56 goto bailout;
57
58 /* We ignore the return value of tjDecompressHeader3(), because some JPEG
59 images may have unusual subsampling configurations that the TurboJPEG API
60 cannot identify but can still decompress. */
61 tjDecompressHeader3(handle, data, size, &width, &height, &jpegSubsamp,
62 &jpegColorspace);
63
64 /* Ignore 0-pixel images and images larger than 1 Megapixel, as Google's
65 OSS-Fuzz target for libjpeg-turbo did. Casting width to (uint64_t)
66 prevents integer overflow if width * height > INT_MAX. */
67 if (width < 1 || height < 1 || (uint64_t)width * height > 1048576)
68 goto bailout;
69
70 for (pfi = 0; pfi < NUMPF; pfi++) {
71 int pf = pixelFormats[pfi], flags = TJFLAG_LIMITSCANS, i, sum = 0;
72 int w = width, h = height;
73
74 /* Test non-default decompression options on the first iteration. */
75 if (pfi == 0)
76 flags |= TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
77 /* Test IDCT scaling on the second iteration. */
78 else if (pfi == 1) {
79 w = (width + 1) / 2;
80 h = (height + 1) / 2;
81 }
82
83 if ((dstBuf = (unsigned char *)malloc(w * h * tjPixelSize[pf])) == NULL)
84 goto bailout;
85
86 if (tjDecompress2(handle, data, size, dstBuf, w, 0, h, pf, flags) == 0) {
87 /* Touch all of the output pixels in order to catch uninitialized reads
88 when using MemorySanitizer. */
89 for (i = 0; i < w * h * tjPixelSize[pf]; i++)
90 sum += dstBuf[i];
91 }
92
93 free(dstBuf);
94 dstBuf = NULL;
95
96 /* Prevent the code above from being optimized out. This test should never
97 be true, but the compiler doesn't know that. */
98 if (sum > 255 * 1048576 * tjPixelSize[pf])
99 goto bailout;
100 }
101
102 bailout:
103 free(dstBuf);
104 if (handle) tjDestroy(handle);
105 return 0;
106 }
107