kc3-lang/libjpeg-turbo/fuzz/decompress_yuv.cc

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• Hash : 2a5a3c6f
  Author :
  Date : 2023-02-07T13:13:24
  

  OSS-Fuzz: Bail out immediately on decomp failure
  
  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.
  

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• fuzz/decompress_yuv.cc

• /*
   * Copyright (C)2021-2023 D. R. Commander.  All Rights Reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * - Redistributions of source code must retain the above copyright notice,
   *   this list of conditions and the following disclaimer.
   * - Redistributions in binary form must reproduce the above copyright notice,
   *   this list of conditions and the following disclaimer in the documentation
   *   and/or other materials provided with the distribution.
   * - Neither the name of the libjpeg-turbo Project nor the names of its
   *   contributors may be used to endorse or promote products derived from this
   *   software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <turbojpeg.h>
  #include <stdlib.h>
  #include <stdint.h>
  
  
  #define NUMPF  3
  
  
  extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  {
    tjhandle handle = NULL;
    unsigned char *dstBuf = NULL, *yuvBuf = NULL;
    int width = 0, height = 0, jpegSubsamp, pfi;
    /* TJPF_RGB-TJPF_BGR share the same code paths, as do TJPF_RGBX-TJPF_XRGB and
       TJPF_RGBA-TJPF_ARGB.  Thus, the pixel formats below should be the minimum
       necessary to achieve full coverage. */
    enum TJPF pixelFormats[NUMPF] =
      { TJPF_BGR, TJPF_XRGB, TJPF_GRAY };
  #if defined(__has_feature) && __has_feature(memory_sanitizer)
    char env[18] = "JSIMD_FORCENONE=1";
  
    /* The libjpeg-turbo SIMD extensions produce false positives with
       MemorySanitizer. */
    putenv(env);
  #endif
  
    if ((handle = tj3Init(TJINIT_DECOMPRESS)) == NULL)
      goto bailout;
  
    if (tj3DecompressHeader(handle, data, size) < 0)
      goto bailout;
    width = tj3Get(handle, TJPARAM_JPEGWIDTH);
    height = tj3Get(handle, TJPARAM_JPEGHEIGHT);
    jpegSubsamp = tj3Get(handle, TJPARAM_SUBSAMP);
  
    /* Ignore 0-pixel images and images larger than 1 Megapixel.  Casting width
       to (uint64_t) prevents integer overflow if width * height > INT_MAX. */
    if (width < 1 || height < 1 || (uint64_t)width * height > 1048576)
      goto bailout;
  
    tj3Set(handle, TJPARAM_SCANLIMIT, 500);
  
    for (pfi = 0; pfi < NUMPF; pfi++) {
      int w = width, h = height;
      int pf = pixelFormats[pfi], i, sum = 0;
  
      /* Test non-default decompression options on the first iteration. */
      if (!tj3Get(handle, TJPARAM_LOSSLESS)) {
        tj3Set(handle, TJPARAM_BOTTOMUP, pfi == 0);
        tj3Set(handle, TJPARAM_FASTUPSAMPLE, pfi == 0);
        tj3Set(handle, TJPARAM_FASTDCT, pfi == 0);
  
        /* Test IDCT scaling on the second iteration. */
        if (pfi == 1) {
          tjscalingfactor sf = { 3, 4 };
          tj3SetScalingFactor(handle, sf);
          w = TJSCALED(width, sf);
          h = TJSCALED(height, sf);
        } else
          tj3SetScalingFactor(handle, TJUNSCALED);
      }
  
      if ((dstBuf = (unsigned char *)malloc(w * h * tjPixelSize[pf])) == NULL)
        goto bailout;
      if ((yuvBuf =
           (unsigned char *)malloc(tj3YUVBufSize(w, 1, h, jpegSubsamp))) == NULL)
        goto bailout;
  
      if (tj3DecompressToYUV8(handle, data, size, yuvBuf, 1) == 0 &&
          tj3DecodeYUV8(handle, yuvBuf, 1, dstBuf, w, 0, h, pf) == 0) {
        /* Touch all of the output pixels in order to catch uninitialized reads
           when using MemorySanitizer. */
        for (i = 0; i < w * h * tjPixelSize[pf]; i++)
          sum += dstBuf[i];
      } else
        goto bailout;
  
      free(dstBuf);
      dstBuf = NULL;
      free(yuvBuf);
      yuvBuf = NULL;
  
      /* Prevent the code above from being optimized out.  This test should never
         be true, but the compiler doesn't know that. */
      if (sum > 255 * 1048576 * tjPixelSize[pf])
        goto bailout;
    }
  
  bailout:
    free(dstBuf);
    free(yuvBuf);
    tj3Destroy(handle);
    return 0;
  }
  

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