Michael Niedermayer: > Fixes: signed integer overflow: 1394614304 * 2 cannot be represented in type > 'int' > Fixes: > 23491/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5697377020411904 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/mvdec.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c > index 64166a84b1..fa87384c6b 100644 > --- a/libavformat/mvdec.c > +++ b/libavformat/mvdec.c > @@ -355,7 +355,7 @@ static int mv_read_header(AVFormatContext *avctx) > avio_skip(pb, 8); > av_add_index_entry(ast, pos, timestamp, asize, 0, > AVINDEX_KEYFRAME); > av_add_index_entry(vst, pos + asize, i, vsize, 0, > AVINDEX_KEYFRAME); > - timestamp += asize / (ast->codecpar->channels * 2); > + timestamp += asize / (ast->codecpar->channels * 2LL); > } > } else if (!version && avio_rb16(pb) == 3) { > avio_skip(pb, 4); > You could avoid using 64 the 64 bit intermediate by multiplying with 2U or by using asize / ast->codecpar->channels / 2.
Whatever you prefer should also be applied to read_index. - Andreas _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
