[FFmpeg-devel] [PATCH] avfilter/vf_lenscorrection: add assert to ensure there are not more planes than the correction array is large

[Daniel Oberhoff]

---
 Daniel Oberhoff 
 daniel.oberhoff at gmail.com



On Aug 21, 2014, at 12:34 PM, Michael Niedermayer <michaelni at gmx.at> wrote:

> Exceeding the count would write out of array, and should not occur with any
> current pixel format
> 
> Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> ---
> libavfilter/vf_lenscorrection.c |    3 +++
> 1 file changed, 3 insertions(+)
> 
> diff --git a/libavfilter/vf_lenscorrection.c b/libavfilter/vf_lenscorrection.c
> index 58184b0..01380fc 100644
> --- a/libavfilter/vf_lenscorrection.c
> +++ b/libavfilter/vf_lenscorrection.c
> @@ -26,6 +26,7 @@
> #include <stdlib.h>
> #include <math.h>
> 
> +#include "libavutil/avassert.h"
> #include "libavutil/opt.h"
> #include "libavutil/intreadwrite.h"
> #include "libavutil/pixdesc.h"
> @@ -132,6 +133,8 @@ static int config_props(AVFilterLink *outlink)
>     outlink->w = rect->width = inlink->w;
>     outlink->h = rect->height = inlink->h;
>     rect->nb_planes = av_pix_fmt_count_planes(inlink->format);
> +    av_assert0(rect->nb_planes <= FF_ARRAY_ELEMS(rect->correction));

how many planes can there ever be?