Michael Niedermayer 83dab8183e avcodec/simple_idct_template: Fix several integer overflows
Fixes: simple_idct_template.c:184:30: runtime error: signed integer overflow: -1065517056 - 1392182838 cannot be represented in type 'int'
Fixes: simple_idct_template.c:269:21: runtime error: signed integer overflow: 16384 * 259254 cannot be represented in type 'int'
Fixes: simple_idct_template.c:164:17: runtime error: signed integer overflow: 21407 * 210162 cannot be represented in type 'int'
Fixes: simple_idct_template.c:167:17: runtime error: signed integer overflow: 21407 * 210162 cannot be represented in type 'int'
Fixes: simple_idct_template.c:169:19: runtime error: signed integer overflow: 22725 * 259190 cannot be represented in type 'int'
Fixes: simple_idct_template.c:171:19: runtime error: signed integer overflow: 19265 * 259190 cannot be represented in type 'int'
Fixes: simple_idct_template.c:173:19: runtime error: signed integer overflow: 12873 * 259190 cannot be represented in type 'int'
Fixes: simple_idct_template.c:183:28: runtime error: signed integer overflow: 1860878336 + 585177665 cannot be represented in type 'int'
Fixes: simple_idct_template.c:159:17: runtime error: signed integer overflow: 16384 * 189520 cannot be represented in type 'int'
Fixes: simple_idct_template.c:170:22: runtime error: signed integer overflow: 19265 * 130147 cannot be represented in type 'int'
Fixes: simple_idct_template.c:174:23: runtime error: signed integer overflow: -22725 * 130147 cannot be represented in type 'int'
Fixes: simple_idct_template.c:183:20: runtime error: signed integer overflow: 16384 * -175206 cannot be represented in type 'int'
Fixes: simple_idct_template.c:184:22: runtime error: signed integer overflow: -16384 * -175206 cannot be represented in type 'int'
Fixes: simple_idct_template.c:185:22: runtime error: signed integer overflow: -16384 * -175206 cannot be represented in type 'int'
Fixes: simple_idct_template.c:186:20: runtime error: signed integer overflow: 16384 * -175206 cannot be represented in type 'int'
Fixes: simple_idct_template.c:195:26: runtime error: signed integer overflow: 19265 * 150747 cannot be represented in type 'int'
Fixes: simple_idct_template.c:198:27: runtime error: signed integer overflow: -22725 * 150747 cannot be represented in type 'int'
Fixes: simple_idct_template.c:184:37: runtime error: signed integer overflow: 21407 * -171941 cannot be represented in type 'int'
Fixes: simple_idct_template.c:185:37: runtime error: signed integer overflow: 21407 * -171941 cannot be represented in type 'int'
Fixes: simple_idct_template.c:192:27: runtime error: signed integer overflow: -12873 * 206341 cannot be represented in type 'int'
Fixes: simple_idct_template.c:185:30: runtime error: signed integer overflow: 1196441600 + 1703756981 cannot be represented in type 'int'
Fixes: simple_idct_template.c:176:23: runtime error: signed integer overflow: -12873 * 168461 cannot be represented in type 'int'
Fixes: simple_idct_template.c:191:27: runtime error: signed integer overflow: -22725 * -140062 cannot be represented in type 'int'
Fixes: simple_idct_template.c:197:26: runtime error: signed integer overflow: 19265 * -140062 cannot be represented in type 'int'
Fixes: simple_idct_template.c:183:34: runtime error: signed integer overflow: 8867 * -243046 cannot be represented in type 'int'
Fixes: simple_idct_template.c:186:34: runtime error: signed integer overflow: 8867 * -243046 cannot be represented in type 'int'
Fixes: simple_idct_template.c:186:28: runtime error: signed integer overflow: -816234496 - 2139878414 cannot be represented in type 'int'
Fixes: simple_idct_template.c:188:26: runtime error: signed integer overflow: 12873 * -239872 cannot be represented in type 'int'
Fixes: simple_idct_template.c:165:16: runtime error: signed integer overflow: 8867 * -260084 cannot be represented in type 'int'
Fixes: simple_idct_template.c:166:16: runtime error: signed integer overflow: 8867 * -260084 cannot be represented in type 'int'
Fixes: 9135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-6324422955761664

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2018-08-04 16:17:01 +02:00
2017-01-27 17:06:42 +01:00
2018-01-06 18:31:37 +00:00
2018-01-06 18:31:37 +00:00

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.

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