From 7d9cb126893d56ea7b4e1cf4715a7c5e6dc66ad6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 9 Jul 2013 14:01:13 +0200 Subject: [PATCH] avcodec/wmaprodec: Check block_align Fixes undefined behavior Its not known if this condition can be triggered through crafted input. Signed-off-by: Michael Niedermayer --- libavcodec/wmaprodec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index c4e0b0a..ca57f64 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -306,6 +306,10 @@ static av_cold int decode_init(AVCodecContext *avctx) /** generic init */ s->log2_frame_size = av_log2(avctx->block_align) + 4; + if (s->log2_frame_size > 25) { + avpriv_request_sample(avctx, "Large block align"); + return AVERROR_PATCHWELCOME; + } /** frame info */ s->skip_frame = 1; /* skip first frame */ -- 2.7.4