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jv demuxer: prevent video packet size overflow

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In the event of overflow, the JV_PADDING state will avio_skip over
any overflow bytes (using JVFrame.total_size).
This commit is contained in:
Peter Ross 2011-03-12 13:12:05 +11:00
parent 478607668c
commit 435535e411
1 changed files with 2 additions and 0 deletions
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2
libavformat/jvdec.c
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@ -116,6 +116,8 @@ static int read_header(AVFormatContext *s,
jvf->audio_size = avio_rl32(pb);
jvf->video_size = avio_rl32(pb);
jvf->palette_size = avio_r8(pb) ? 768 : 0;
jvf->video_size = FFMIN(FFMAX(jvf->video_size, 0),
INT_MAX - JV_PREAMBLE_SIZE - jvf->palette_size);
if (avio_r8(pb))
av_log(s, AV_LOG_WARNING, "unsupported audio codec\n");
jvf->video_type = avio_r8(pb);