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shorten: validate values in fmt chunk search 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-25 12:31:23 +01:00
parent 18bcfc912e
commit 5e9a56a035
1 changed files with 3 additions and 1 deletions
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4
libavcodec/shorten.c
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@ -205,7 +205,7 @@ static int decode_wave_header(AVCodecContext *avctx, const uint8_t *header,
{
int len;
short wave_format;
const uint8_t *end= header + header_size;
if (bytestream_get_le32(&header) != MKTAG('R','I','F','F')) {
av_log(avctx, AV_LOG_ERROR, "missing RIFF tag\n");
@ -221,6 +221,8 @@ static int decode_wave_header(AVCodecContext *avctx, const uint8_t *header,
while (bytestream_get_le32(&header) != MKTAG('f','m','t',' ')) {
len = bytestream_get_le32(&header);
if(len<0 || end - header - 8 < len)
return AVERROR_INVALIDDATA;
header += len;
}
len = bytestream_get_le32(&header);