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zmbvdec: Check the buffer size for uncompressed data

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Also don't pointlessly set the buffer size to 1 after copying
one packet.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Michael Niedermayer 2012-11-11 18:08:39 +01:00 committed by Martin Storsjö
parent 183b9d843a
commit 0d61f26001
1 changed files with 4 additions and 1 deletions
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5
libavcodec/zmbv.c
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@ -499,8 +499,11 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
}
if (c->comp == 0) { //Uncompressed data
if (c->decomp_size < len) {
av_log(avctx, AV_LOG_ERROR, "Buffer too small\n");
return AVERROR_INVALIDDATA;
}
memcpy(c->decomp_buf, buf, len);
c->decomp_size = 1;
} else { // ZLIB-compressed data
c->zstream.total_in = c->zstream.total_out = 0;
c->zstream.next_in = buf;