Michael Niedermayer: > Fixes: signed integer overflow: 2147483647 + 64 cannot be represented in type > 'int' > Fixes: > 30333/clusterfuzz-testcase-minimized-ffmpeg_dem_RM_fuzzer-5175286983426048 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/rmdec.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c > index 521b9d0e8c..613fb407df 100644 > --- a/libavformat/rmdec.c > +++ b/libavformat/rmdec.c > @@ -223,7 +223,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, > AVIOContext *pb, > if (version == 5) > avio_r8(pb); > codecdata_length = avio_rb32(pb); > - if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= > (unsigned)codecdata_length){ > + if(codecdata_length < 0 || codecdata_length > INT_MAX - > AV_INPUT_BUFFER_PADDING_SIZE){ > av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); > return -1; > } > The first of these checks can be avoided by making codecdata_length unsigned.
- 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".
