Quoting Michael Niedermayer (2022-09-18 19:14:07) > Fixes: signed integer overflow: 119760682 - -2084600173 cannot be represented > in type 'int' > Fixes: > 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-6745781167587328 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/vividas.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/libavformat/vividas.c b/libavformat/vividas.c > index e9954f73ed0..22f61db7576 100644 > --- a/libavformat/vividas.c > +++ b/libavformat/vividas.c > @@ -643,7 +643,9 @@ static int viv_read_packet(AVFormatContext *s, > > if (viv->current_audio_subpacket < viv->n_audio_subpackets) { > AVStream *astream; > - int size = > viv->audio_subpackets[viv->current_audio_subpacket+1].start - > viv->audio_subpackets[viv->current_audio_subpacket].start; > + int64_t size = > viv->audio_subpackets[viv->current_audio_subpacket+1].start - > (int64_t)viv->audio_subpackets[viv->current_audio_subpacket].start; > + if (size < 0 || size != (int)size) > + return AVERROR_INVALIDDATA;
These values should be checked in the loop where they are set. -- Anton Khirnov _______________________________________________ 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".
