ffmpeg | branch: release/4.3 | Michael Niedermayer <mich...@niedermayer.cc> | Tue Feb 2 20:47:10 2021 +0100| [1563042dc3385d0fe6d53a09cf8844a62b7d94bb] | committer: Michael Niedermayer
avformat/mvdec: Sanity check SAMPLE_WIDTH Fixes: signed integer overflow: 999999999 * 8 cannot be represented in type 'int' Fixes: 30048/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5864289917337600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Peter Ross <pr...@xvid.org> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit ab82c105787fa81d1e35b9209f3d53e98be936a4) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1563042dc3385d0fe6d53a09cf8844a62b7d94bb --- libavformat/mvdec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c index d5b400213d..37e16870e7 100644 --- a/libavformat/mvdec.c +++ b/libavformat/mvdec.c @@ -159,7 +159,10 @@ static int parse_audio_var(AVFormatContext *avctx, AVStream *st, st->codecpar->sample_rate = var_read_int(pb, size); avpriv_set_pts_info(st, 33, 1, st->codecpar->sample_rate); } else if (!strcmp(name, "SAMPLE_WIDTH")) { - st->codecpar->bits_per_coded_sample = var_read_int(pb, size) * 8; + uint64_t bpc = var_read_int(pb, size) * (uint64_t)8; + if (bpc > 16) + return AVERROR_INVALIDDATA; + st->codecpar->bits_per_coded_sample = bpc; } else return AVERROR_INVALIDDATA; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
