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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-16 18:05:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-18 20:42:20 +0200 |
| commit | aee8477c6ba20469ebe531448d31c642717b5f48 (patch) | |
| tree | 29631ad0a205a7082a1a1b2d8d261183f6b0d316 | |
| parent | 847dc03787b0e04f098be932f32b04c1fde3f082 (diff) | |
| download | ffmpeg-aee8477c6ba20469ebe531448d31c642717b5f48.tar.gz | |
avformat/rmdec: sanity check coded_framesize
Fixes: signed integer overflow: -14671840 * 8224 cannot be represented in type 'int'
Fixes: 24793/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5101884323659776
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/rmdec.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c index 72b8dba741..03ddf29226 100644 --- a/libavformat/rmdec.c +++ b/libavformat/rmdec.c @@ -165,7 +165,11 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb, avio_rb16(pb); /* version2 */ avio_rb32(pb); /* header size */ flavor= avio_rb16(pb); /* add codec info / flavor */ - ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */ + coded_framesize = avio_rb32(pb); /* coded frame size */ + if (coded_framesize < 0) + return AVERROR_INVALIDDATA; + ast->coded_framesize = coded_framesize; + avio_rb32(pb); /* ??? */ bytes_per_minute = avio_rb32(pb); if (version == 4) { |