virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity

avformat/siff: Basic pkt_size check

Browse Source 
Fixes: half of CID1258461 Overflowed constant

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-11 20:58:21 +02:00
parent 759aae590c
commit 124a97dd8b
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libavformat/siff.c
View File

@ -199,7 +199,10 @@ static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
if (c->cur_frame >= c->frames) if (c->cur_frame >= c->frames)
return AVERROR_EOF; return AVERROR_EOF;
if (c->curstrm == -1) { 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); c->flags = avio_rl16(s->pb);
if (c->flags & VB_HAS_AUDIO && !c->has_audio) if (c->flags & VB_HAS_AUDIO && !c->has_audio)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;