ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Thu Jul 11 20:58:21 2024 +0200| [2975e218a0b4915d453c3331c77b90be4c806ab0] | committer: Michael Niedermayer
avformat/siff: Basic pkt_size check Fixes: half of CID1258461 Overflowed constant Sponsored-by: Sovereign Tech Fund Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 124a97dd8b7636fb52e042b2e85a44cce40ab5e7) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2975e218a0b4915d453c3331c77b90be4c806ab0 --- libavformat/siff.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavformat/siff.c b/libavformat/siff.c index 40eed8d700..cc6b6c4484 100644 --- a/libavformat/siff.c +++ b/libavformat/siff.c @@ -198,7 +198,10 @@ 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; _______________________________________________ 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".
