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avcodec/tscc: Check side data size before use

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Fixes out of array read

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 979bca5134)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-10-30 15:12:12 +01:00
parent 8fd3293fa1
commit 4251dc6d7e
1 changed files with 5 additions and 2 deletions
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7
libavcodec/tscc.c
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@ -99,11 +99,14 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
/* make the palette available on the way out */
if (c->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
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) {
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);
}