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avcodec/msrle: Check side data size before use

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Fixes out of array read

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-10-30 15:12:12 +01:00
parent 21b68cdbae
commit a6330119a0
1 changed files with 5 additions and 2 deletions
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7
libavcodec/msrle.c
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@ -99,11 +99,14 @@ static int msrle_decode_frame(AVCodecContext *avctx,
return ret;
if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) {
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
int size;
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
if (pal) {
if (pal && size == AVPALETTE_SIZE) {
s->frame->palette_has_changed = 1;
memcpy(s->pal, pal, AVPALETTE_SIZE);
} else if (pal) {
av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
}
/* make the palette available */
memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);