From 3c4c5ca1c194464f51de87534d15602f99bf9759 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 14 Jun 2013 21:13:47 +0200 Subject: [PATCH] avcodec/g2meet: Check monochrome cursor width Fixes out of array write Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavcodec/g2meet.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index 2aa9b2b589..09ed7ce7c4 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -514,6 +514,11 @@ static int g2m_load_cursor(AVCodecContext *avctx, G2MContext *c, return AVERROR_PATCHWELCOME; } + if (cursor_fmt == 1 && cursor_w % 32) { + avpriv_report_missing_feature(avctx, "odd monochrome cursor width %d", cursor_w); + return AVERROR_PATCHWELCOME; + } + tmp = av_realloc(c->cursor, cursor_stride * cursor_h); if (!tmp) { av_log(avctx, AV_LOG_ERROR, "Cannot allocate cursor buffer\n");