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avcodec/8bps: Check side data size before use 

Fixes out of array read

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 042faa847f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-10-30 13:44:52 +01:00
parent acd2c3842c
commit 53f8e8388e
1 changed files with 5 additions and 2 deletions
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7
libavcodec/8bps.c
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@ -120,12 +120,15 @@ static int decode_frame(AVCodecContext *avctx, void *data,
}
if (avctx->bits_per_coded_sample <= 8) {
int size;
const uint8_t *pal = av_packet_get_side_data(avpkt,
AV_PKT_DATA_PALETTE,
NULL);
if (pal) {
&size);
if (pal && size == AVPALETTE_SIZE) {
frame->palette_has_changed = 1;
memcpy(c->pal, pal, AVPALETTE_SIZE);
} else if (pal) {
av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
}
memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);