From 979bca513424879ed0c653cb1b55fc4156a89576 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 30 Oct 2016 15:12:12 +0100 Subject: [PATCH] avcodec/tscc: Check side data size before use Fixes out of array read Signed-off-by: Michael Niedermayer --- libavcodec/tscc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavcodec/tscc.c b/libavcodec/tscc.c index bd5fe035cf..cb86b584c1 100644 --- a/libavcodec/tscc.c +++ b/libavcodec/tscc.c @@ -98,11 +98,14 @@ 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); }