Coverage Report

Created: 2023-03-26 06:43

/src/cms_profile_fuzzer.c
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Source (jump to first uncovered line)
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/* Copyright 2022 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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      http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <stdint.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "lcms2.h"
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cmsTagSignature tagsToRead[] = {
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  cmsSigGreenColorantTag,
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  cmsSigGreenMatrixColumnTag,
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  cmsSigGreenTRCTag,
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  cmsSigMeasurementTag,
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  cmsSigNamedColorTag,
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  cmsSigPreview1Tag,
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  cmsSigPs2CRD2Tag,
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  cmsSigPs2CRD3Tag,
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  cmsSigRedTRCTag,
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};
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3.20k
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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3.20k
  if (size == 0)
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0
    return 0;
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3.20k
  char filename[256];
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3.20k
  sprintf(filename, "/tmp/libfuzzer.%d.icc", getpid());
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3.20k
  FILE *fp = fopen(filename, "wb");
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3.20k
  if (!fp) {
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0
    return 0;
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0
  }
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3.20k
  fwrite(data, size, 1, fp);
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3.20k
  fclose(fp);
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3.20k
  cmsHPROFILE hProfile = cmsOpenProfileFromFile(filename, "r");
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  // If we have a profile, perform a set of operations
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3.20k
  if (hProfile) {
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2.45k
    char tagBuffer[4];
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    // Perform multiple tag reads. Read tags twice as behavior matters
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    // if tags have been read before.
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7.35k
    for (int j = 0; j < 2; j++) {
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49.0k
      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {
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44.1k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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44.1k
        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);
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44.1k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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44.1k
        cmsReadTag(hProfile, tagsToRead[i]);
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44.1k
      }
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4.90k
    }
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    // Read profile info
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2.45k
    cmsInfoType info = data[0] % 4;
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2.45k
    char outBuffer[100];
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2.45k
    cmsGetProfileInfoASCII(hProfile, info, "DEN", "DEN", outBuffer, 100);
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2.45k
    cmsGetTagCount(hProfile);
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2.45k
    if (size > 2) {
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2.45k
      cmsGetTagSignature(hProfile, (cmsUInt32Number)data[1]);
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2.45k
    }
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2.45k
    if (size > 40) {
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2.45k
      cmsTagSignature tag = *((uint32_t *)(data+5));
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2.45k
      cmsTagLinkedTo(hProfile, tag);
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2.45k
    }
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    // Save to random file
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2.45k
    cmsSaveProfileToFile(hProfile, "random.icc");
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2.45k
    cmsCloseProfile(hProfile);
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2.45k
  }
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  // Let's write the profile now.
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3.20k
  hProfile = cmsOpenProfileFromFile(filename, "w");
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3.20k
  if (hProfile) {
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3.20k
    char tagBuffer[4] = {'a', 'a', 'a', 'a'};
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    // Perform multiple tag reads
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9.62k
    for (int j = 0; j < 2; j++) {
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64.1k
      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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57.7k
        cmsReadTag(hProfile, tagsToRead[i]);
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57.7k
      }
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6.41k
    }
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32.0k
    for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {
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28.8k
      cmsWriteRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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28.8k
    }
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9.62k
    for (int j = 0; j < 2; j++) {
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64.1k
      for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], NULL, 0);
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57.7k
        cmsReadRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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57.7k
        cmsReadTag(hProfile, tagsToRead[i]);
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57.7k
      }
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6.41k
    }
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32.0k
    for (int i = 0; i < sizeof(tagsToRead)/sizeof(tagsToRead[0]); i++) {
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28.8k
      cmsWriteRawTag(hProfile, tagsToRead[i], tagBuffer, 4);
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28.8k
    }
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    // Save to random file
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3.20k
    cmsSaveProfileToFile(hProfile, "random.icc");
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3.20k
    cmsCloseProfile(hProfile);
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3.20k
  }
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3.20k
  unlink(filename);
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3.20k
  return 0;
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3.20k
}