6316d4d752
Don't keep trying to decompress the same image if tj3Decompress*() has already thrown an error. Otherwise, if the image has an excessive number of scans, then each iteration of the loop will try to decompress up to the scan limit, which may cause the overall test to time out even if one iteration doesn't time out.
108 lines
4.1 KiB
C++
108 lines
4.1 KiB
C++
/*
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* Copyright (C)2021, 2023 D. R. Commander. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the libjpeg-turbo Project nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <turbojpeg.h>
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#include <stdlib.h>
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#include <stdint.h>
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#define NUMPF 4
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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tjhandle handle = NULL;
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unsigned char *dstBuf = NULL;
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int width = 0, height = 0, jpegSubsamp, jpegColorspace, pfi;
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/* TJPF_RGB-TJPF_BGR share the same code paths, as do TJPF_RGBX-TJPF_XRGB and
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TJPF_RGBA-TJPF_ARGB. Thus, the pixel formats below should be the minimum
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necessary to achieve full coverage. */
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enum TJPF pixelFormats[NUMPF] =
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{ TJPF_RGB, TJPF_BGRX, TJPF_GRAY, TJPF_CMYK };
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#if defined(__has_feature) && __has_feature(memory_sanitizer)
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char env[18] = "JSIMD_FORCENONE=1";
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/* The libjpeg-turbo SIMD extensions produce false positives with
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MemorySanitizer. */
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putenv(env);
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#endif
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if ((handle = tjInitDecompress()) == NULL)
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goto bailout;
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/* We ignore the return value of tjDecompressHeader3(), because some JPEG
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images may have unusual subsampling configurations that the TurboJPEG API
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cannot identify but can still decompress. */
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tjDecompressHeader3(handle, data, size, &width, &height, &jpegSubsamp,
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&jpegColorspace);
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/* Ignore 0-pixel images and images larger than 1 Megapixel, as Google's
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OSS-Fuzz target for libjpeg-turbo did. Casting width to (uint64_t)
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prevents integer overflow if width * height > INT_MAX. */
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if (width < 1 || height < 1 || (uint64_t)width * height > 1048576)
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goto bailout;
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for (pfi = 0; pfi < NUMPF; pfi++) {
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int pf = pixelFormats[pfi], flags = TJFLAG_LIMITSCANS, i, sum = 0;
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int w = width, h = height;
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/* Test non-default decompression options on the first iteration. */
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if (pfi == 0)
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flags |= TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
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/* Test IDCT scaling on the second iteration. */
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else if (pfi == 1) {
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w = (width + 1) / 2;
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h = (height + 1) / 2;
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}
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if ((dstBuf = (unsigned char *)malloc(w * h * tjPixelSize[pf])) == NULL)
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goto bailout;
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if (tjDecompress2(handle, data, size, dstBuf, w, 0, h, pf, flags) == 0) {
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/* Touch all of the output pixels in order to catch uninitialized reads
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when using MemorySanitizer. */
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for (i = 0; i < w * h * tjPixelSize[pf]; i++)
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sum += dstBuf[i];
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} else
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goto bailout;
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free(dstBuf);
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dstBuf = NULL;
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/* Prevent the code above from being optimized out. This test should never
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be true, but the compiler doesn't know that. */
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if (sum > 255 * 1048576 * tjPixelSize[pf])
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goto bailout;
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}
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bailout:
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free(dstBuf);
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if (handle) tjDestroy(handle);
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return 0;
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}
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