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avcodec/wmalosslessdec: Fix return code for invalid buffer sizes

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Fixes infinite loop
Fixes Ticket2979

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-25 21:42:56 +02:00
parent f5498ef38d
commit 851a6e2f1a
1 changed files with 4 additions and 2 deletions
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6
libavcodec/wmalosslessdec.c
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@ -1178,8 +1178,10 @@ static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
s->packet_done = 0;
/* sanity check for the buffer length */
if (buf_size < avctx->block_align)
return 0;
if (buf_size < avctx->block_align) {
av_log(avctx, AV_LOG_ERROR, "buf size %d invalid\n", buf_size);
return AVERROR_INVALIDDATA;
}
s->next_packet_start = buf_size - avctx->block_align;
buf_size = avctx->block_align;