From 7205e896a1ceb0e5c0256ed9cc1f69cf1fe664d4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 30 Nov 2012 20:58:26 +0100 Subject: dxa: check reference frame availability before use. Fix NULL pointer dereference Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavcodec/dxa.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'libavcodec/dxa.c') diff --git a/libavcodec/dxa.c b/libavcodec/dxa.c index d43e1134e2..cf8ce0c46f 100644 --- a/libavcodec/dxa.c +++ b/libavcodec/dxa.c @@ -270,6 +270,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac case 13: c->pic.key_frame = 0; c->pic.pict_type = AV_PICTURE_TYPE_P; + if (!c->prev.data[0]) { + av_log(avctx, AV_LOG_ERROR, "Missing reference frame\n"); + return AVERROR_INVALIDDATA; + } decode_13(avctx, c, c->pic.data[0], srcptr, c->prev.data[0]); break; default: -- cgit v1.2.3