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iff/ilbm: check remaining buffer size.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-09 20:58:57 +01:00
parent b8551f8ea7
commit 2fbb37b51b
1 changed files with 2 additions and 2 deletions
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4
libavcodec/iff.c
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@ -575,13 +575,13 @@ static int decode_frame_ilbm(AVCodecContext *avctx,
}
} else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
for(y = 0; y < avctx->height; y++ ) {
for(y = 0; y < avctx->height && buf_end > buf; y++ ) {
uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
buf += avctx->width + (avctx->width % 2); // padding if odd
}
} else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
for (y = 0; y < avctx->height; y++) {
for (y = 0; y < avctx->height && buf_end > buf; y++) {
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
buf += avctx->width + (avctx->width & 1); // padding if odd