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avcodec/gifdec: print error if image is not within dimensions 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-22 11:00:02 +01:00
parent 8b2578ab45
commit 564ae836fb
1 changed files with 3 additions and 1 deletions
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4
libavcodec/gifdec.c
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@ -181,8 +181,10 @@ static int gif_read_image(GifState *s, AVFrame *frame)
/* verify that all the image is inside the screen dimensions */
if (left + width > s->screen_width ||
top + height > s->screen_height)
top + height > s->screen_height) {
av_log(s->avctx, AV_LOG_ERROR, "image is outside the screen dimensions.\n");
return AVERROR_INVALIDDATA;
}
if (width <= 0 || height <= 0) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid image dimensions.\n");
return AVERROR_INVALIDDATA;