From: Michael Niedermayer Date: Thu, 24 Jan 2013 23:03:59 +0000 (+0100) Subject: gifdec: check that w,h is not zero X-Git-Tag: n1.2~921 X-Git-Url: http://git.videolan.org/?p=ffmpeg.git;a=commitdiff_plain;h=286930d302fd34cfc2541bfdd760a8bbf9f2d2e5 gifdec: check that w,h is not zero Fixes out of array access Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- diff --git a/libavcodec/gifdec.c b/libavcodec/gifdec.c index 2d9f8b4f3d..d52f2d5348 100644 --- a/libavcodec/gifdec.c +++ b/libavcodec/gifdec.c @@ -187,6 +187,8 @@ static int gif_read_image(GifState *s) if (left + width > s->screen_width || top + height > s->screen_height) return AVERROR_INVALIDDATA; + if (width <= 0 || height <= 0) + return AVERROR_INVALIDDATA; /* process disposal method */ if (s->gce_prev_disposal == GCE_DISPOSAL_BACKGROUND) {