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wmaprodec: return an error, not 0, when the input is too small. 

Returning 0 may result in an infinite loop in valid calling programs. A
decoder should never return 0 without producing any output.

CC:libav-stable@libav.org
(cherry picked from commit 4c0080b7e7)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 60dd8b5733)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Anton Khirnov 2013-03-06 10:02:50 +01:00 committed by Reinhard Tartler
parent d86a5ce03f
commit 5025dbc577
1 changed files with 5 additions and 2 deletions
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7
libavcodec/wmaprodec.c
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@ -1502,8 +1502,11 @@ static int decode_packet(AVCodecContext *avctx,
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, "Input packet too small (%d < %d)\n",
buf_size, avctx->block_align);
return AVERROR_INVALIDDATA;
}
s->next_packet_start = buf_size - avctx->block_align;
buf_size = avctx->block_align;