Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/guetzli-1.0.1/guetzli/butteraugli_comparator.cc
Examining data/guetzli-1.0.1/guetzli/butteraugli_comparator.h
Examining data/guetzli-1.0.1/guetzli/color_transform.h
Examining data/guetzli-1.0.1/guetzli/comparator.h
Examining data/guetzli-1.0.1/guetzli/dct_double.cc
Examining data/guetzli-1.0.1/guetzli/dct_double.h
Examining data/guetzli-1.0.1/guetzli/debug_print.cc
Examining data/guetzli-1.0.1/guetzli/debug_print.h
Examining data/guetzli-1.0.1/guetzli/entropy_encode.cc
Examining data/guetzli-1.0.1/guetzli/entropy_encode.h
Examining data/guetzli-1.0.1/guetzli/fast_log.h
Examining data/guetzli-1.0.1/guetzli/fdct.cc
Examining data/guetzli-1.0.1/guetzli/fdct.h
Examining data/guetzli-1.0.1/guetzli/gamma_correct.cc
Examining data/guetzli-1.0.1/guetzli/gamma_correct.h
Examining data/guetzli-1.0.1/guetzli/guetzli.cc
Examining data/guetzli-1.0.1/guetzli/idct.cc
Examining data/guetzli-1.0.1/guetzli/idct.h
Examining data/guetzli-1.0.1/guetzli/jpeg_bit_writer.h
Examining data/guetzli-1.0.1/guetzli/jpeg_data.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_data.h
Examining data/guetzli-1.0.1/guetzli/jpeg_data_decoder.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_data_decoder.h
Examining data/guetzli-1.0.1/guetzli/jpeg_data_encoder.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_data_encoder.h
Examining data/guetzli-1.0.1/guetzli/jpeg_data_reader.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_data_reader.h
Examining data/guetzli-1.0.1/guetzli/jpeg_data_writer.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_data_writer.h
Examining data/guetzli-1.0.1/guetzli/jpeg_error.h
Examining data/guetzli-1.0.1/guetzli/jpeg_huffman_decode.cc
Examining data/guetzli-1.0.1/guetzli/jpeg_huffman_decode.h
Examining data/guetzli-1.0.1/guetzli/output_image.cc
Examining data/guetzli-1.0.1/guetzli/output_image.h
Examining data/guetzli-1.0.1/guetzli/preprocess_downsample.cc
Examining data/guetzli-1.0.1/guetzli/preprocess_downsample.h
Examining data/guetzli-1.0.1/guetzli/processor.cc
Examining data/guetzli-1.0.1/guetzli/processor.h
Examining data/guetzli-1.0.1/guetzli/quality.cc
Examining data/guetzli-1.0.1/guetzli/quality.h
Examining data/guetzli-1.0.1/guetzli/quantize.cc
Examining data/guetzli-1.0.1/guetzli/quantize.h
Examining data/guetzli-1.0.1/guetzli/score.cc
Examining data/guetzli-1.0.1/guetzli/score.h
Examining data/guetzli-1.0.1/guetzli/stats.h
Examining data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.cc
Examining data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.h
Examining data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli_main.cc

FINAL RESULTS:

data/guetzli-1.0.1/guetzli/debug_print.h:31:5:  [4] (format) snprintf:
  If format strings can be influenced by an attacker, they can be exploited,
  and note that sprintf variations do not always \0-terminate (CWE-134). Use
  a constant for the format specification.
    snprintf(debug_string, sizeof(debug_string), __VA_ARGS__);     \
data/guetzli-1.0.1/guetzli/debug_print.h:30:5:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
    char debug_string[1024];                                       \
data/guetzli-1.0.1/guetzli/guetzli.cc:117:9:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
        memcpy(row_out, row_in, 3 * (*xsize));
data/guetzli-1.0.1/guetzli/guetzli.cc:214:17:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
      quality = atoi(argv[opt_idx]);
data/guetzli-1.0.1/guetzli/guetzli.cc:217:21:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
      memlimit_mb = atoi(argv[opt_idx]);
data/guetzli-1.0.1/guetzli/guetzli.cc:230:15:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  FILE* fin = fopen(argv[opt_idx], "rb");
data/guetzli-1.0.1/guetzli/guetzli.cc:292:16:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  FILE* fout = fopen(argv[opt_idx + 1], "wb");
data/guetzli-1.0.1/guetzli/jpeg_data.cc:87:7:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
      memcpy(&table.values[0], &q[i][0], kTableSize);
data/guetzli-1.0.1/guetzli/jpeg_data_encoder.cc:109:9:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
        memcpy(&jpg->components[i].coeffs[block_ix * kDCTBlockSize],
data/guetzli-1.0.1/guetzli/jpeg_data_writer.cc:325:7:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
      memcpy(&depth[second_last * JpegHistogram::kSize], depth_combined,
data/guetzli-1.0.1/guetzli/output_image.cc:64:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(block, &coeffs_[offset], kDCTBlockSize * sizeof(coeffs_[0]));
data/guetzli-1.0.1/guetzli/output_image.cc:128:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(&coeffs_[offset], block, kDCTBlockSize * sizeof(coeffs_[0]));
data/guetzli-1.0.1/guetzli/output_image.cc:369:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(&q[c][0], components_[c].quant(), kDCTBlockSize * sizeof(q[0][0]));
data/guetzli-1.0.1/guetzli/output_image.cc:443:3:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
  char buf[128];
data/guetzli-1.0.1/guetzli/processor.cc:85:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(&q_in[i][0], q, kDCTBlockSize * sizeof(q[0]));
data/guetzli-1.0.1/guetzli/processor.cc:491:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(&(*depths)[i * JpegHistogram::kSize],
data/guetzli-1.0.1/guetzli/processor.cc:550:11:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
          memcpy(&orig_block[c * kDCTBlockSize],
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.cc:61:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(aligned - kPointerSize, &allocated, kPointerSize);
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.cc:72:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(&allocated, aligned - kPointerSize, kPointerSize);
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.h:322:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(to, from, other.ysize() * other.bytes_per_row());
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.h:352:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(row_to, row_from, xsize * sizeof(T));
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli.h:365:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(row_to, row_from, xsize * sizeof(T));
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli_main.cc:279:13:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  FILE* f = fopen(filename, "r");
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli_main.cc:284:12:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
  unsigned char magic[2];
data/guetzli-1.0.1/third_party/butteraugli/butteraugli/butteraugli_main.cc:412:24:  [2] (misc) fopen:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
    FILE* const fmap = fopen(argv[3], "wb");

ANALYSIS SUMMARY:

Hits = 25
Lines analyzed = 9606 in approximately 0.33 seconds (28792 lines/second)
Physical Source Lines of Code (SLOC) = 7328
Hits@level = [0]  84 [1]   0 [2]  24 [3]   0 [4]   1 [5]   0
Hits@level+ = [0+] 109 [1+]  25 [2+]  25 [3+]   1 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 14.8745 [1+] 3.41157 [2+] 3.41157 [3+] 0.136463 [4+] 0.136463 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.