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avcodec/xpmdec: skip everything before signature

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-03-12 15:07:02 +01:00
parent 01b069c1b8
commit e73325b971
1 changed files with 4 additions and 1 deletions
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5
libavcodec/xpmdec.c
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@ -309,7 +309,10 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data,
avctx->pix_fmt = AV_PIX_FMT_BGRA;
end = avpkt->data + avpkt->size;
if (memcmp(ptr, "/* XPM */", 9)) {
while (memcmp(ptr, "/* XPM */\n", 10) && ptr < end - 10)
ptr++;
if (ptr >= end) {
av_log(avctx, AV_LOG_ERROR, "missing signature\n");
return AVERROR_INVALIDDATA;
}