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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-01-25 00:03:59 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-01-25 03:30:04 +0100 |
| commit | 286930d302fd34cfc2541bfdd760a8bbf9f2d2e5 (patch) | |
| tree | 2d45f6fd3ba9dbe7d8e88a1646af68f94ef300ff /libavcodec/gifdec.c | |
| parent | a0d1440476ced02c17e26947e48ab68a38b36a0e (diff) | |
| download | ffmpeg-286930d302fd34cfc2541bfdd760a8bbf9f2d2e5.tar.gz | |
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 <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/gifdec.c')
| -rw-r--r-- | libavcodec/gifdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
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) { |