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bfi: Add some very basic sanity checks for input packet sizes

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CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-09-28 23:46:04 +03:00
parent 9fc7184d1a
commit 640a2427aa
1 changed files with 4 additions and 0 deletions
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4
libavformat/bfi.c
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@ -132,6 +132,10 @@ static int bfi_read_packet(AVFormatContext * s, AVPacket * pkt)
video_offset = avio_rl32(pb); video_offset = avio_rl32(pb);
audio_size = video_offset - audio_offset; audio_size = video_offset - audio_offset;
bfi->video_size = chunk_size - video_offset; bfi->video_size = chunk_size - video_offset;
if (audio_size < 0 || bfi->video_size < 0) {
av_log(s, AV_LOG_ERROR, "Invalid audio/video offsets or chunk size\n");
return AVERROR_INVALIDDATA;
}
//Tossing an audio packet at the audio decoder. //Tossing an audio packet at the audio decoder.
ret = av_get_packet(pb, pkt, audio_size); ret = av_get_packet(pb, pkt, audio_size);