From 161ccdaa06d1d109e8f77d2535bda11ce02720f5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 30 Oct 2016 15:12:12 +0100 Subject: [PATCH] avcodec/msvideo1: Check side data size before use Fixes out of array read Signed-off-by: Michael Niedermayer --- libavcodec/msvideo1.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c index 1d141723f6..a49b9be364 100644 --- a/libavcodec/msvideo1.c +++ b/libavcodec/msvideo1.c @@ -305,11 +305,14 @@ static int msvideo1_decode_frame(AVCodecContext *avctx, return ret; if (s->mode_8bit) { - 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) { memcpy(s->pal, pal, AVPALETTE_SIZE); s->frame->palette_has_changed = 1; + } else if (pal) { + av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size); } }