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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>
(cherry picked from commit 8f238dd9bd)
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Conflicts:
	libavcodec/jvdec.c

(cherry picked from commit 50cb695bf1)
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Conflicts:
	libavcodec/jvdec.c
This commit is contained in:
Anton Khirnov
2014-12-14 21:01:59 +01:00
parent 0ceb2dffb6
commit 954aafaa96
1 changed files with 8 additions and 0 deletions
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8
libavcodec/jvdec.c
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@@ -42,6 +42,14 @@ static av_cold int decode_init(AVCodecContext *avctx)
JvContext *s = avctx->priv_data;
avctx->pix_fmt = PIX_FMT_PAL8;
dsputil_init(&s->dsp, avctx);
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);
}
return 0;
}