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jvdec: check frame dimensions

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The frame size must be set by the caller and each dimension must be a
multiple of 8.

CC: libav-stable@libav.org
Bug-ID: CVE-2014-8542
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
(cherry picked from commit 88626e5af8)
Signed-off-by: Anton Khirnov <anton@khirnov.net>
(cherry picked from commit 55788572ea)
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Anton Khirnov
2014-12-14 21:01:59 +01:00
parent da4f5d9d77
commit 8f238dd9bd
1 changed files with 7 additions and 0 deletions
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7
libavcodec/jvdec.c
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@@ -43,6 +43,13 @@ static av_cold int decode_init(AVCodecContext *avctx)
{ {
JvContext *s = avctx->priv_data; JvContext *s = avctx->priv_data;
if (!avctx->width || !avctx->height ||
(avctx->width & 7) || (avctx->height & 7)) {
av_log(avctx, AV_LOG_ERROR, "Invalid video dimensions: %dx%d\n",
avctx->width, avctx->height);
return AVERROR(EINVAL);
}
s->frame = av_frame_alloc(); s->frame = av_frame_alloc();
if (!s->frame) if (!s->frame)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);