Fixes: half of CID1258461 Overflowed constant Sponsored-by: Sovereign Tech Fund Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/siff.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/libavformat/siff.c b/libavformat/siff.c index 5aad03d870f..b33746d51d2 100644 --- a/libavformat/siff.c +++ b/libavformat/siff.c @@ -199,7 +199,10 @@ static int siff_read_packet(AVFormatContext *s, AVPacket *pkt) if (c->cur_frame >= c->frames) return AVERROR_EOF; if (c->curstrm == -1) { - c->pktsize = avio_rl32(s->pb) - 4; + unsigned pktsize = avio_rl32(s->pb); + if (pktsize < 4) + return AVERROR_INVALIDDATA; + c->pktsize = pktsize - 4; c->flags = avio_rl16(s->pb); if (c->flags & VB_HAS_AUDIO && !c->has_audio) return AVERROR_INVALIDDATA; -- 2.45.2 _______________________________________________ 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".