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Re: [PATCH v2 7/8] sm501: Do not allow guest to set invalid format
From: |
Peter Maydell |
Subject: |
Re: [PATCH v2 7/8] sm501: Do not allow guest to set invalid format |
Date: |
Thu, 18 Jun 2020 17:43:59 +0100 |
On Tue, 16 Jun 2020 at 01:35, BALATON Zoltan <balaton@eik.bme.hu> wrote:
>
> Prevent guest setting invalid format value that might trip checks in
> sm501_2d_operation().
>
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
> hw/display/sm501.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/hw/display/sm501.c b/hw/display/sm501.c
> index 6e914d3162..583a0ff6b5 100644
> --- a/hw/display/sm501.c
> +++ b/hw/display/sm501.c
> @@ -1503,6 +1503,9 @@ static void sm501_2d_engine_write(void *opaque, hwaddr
> addr,
> s->twoD_background = value;
> break;
> case SM501_2D_STRETCH:
> + if (((value >> 20) & 3) == 3) {
> + value &= ~BIT(20);
> + }
> s->twoD_stretch = value;
> break;
> case SM501_2D_COLOR_COMPARE:
> --
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
- [PATCH v2 0/8] More sm501 fixes and optimisations, BALATON Zoltan, 2020/06/15
- [PATCH v2 2/8] sm501: Drop unneded variable, BALATON Zoltan, 2020/06/15
- [PATCH v2 4/8] sm501: Introduce variable for commonly used value for better readability, BALATON Zoltan, 2020/06/15
- [PATCH v2 5/8] sm501: Optimise 1 pixel 2d ops, BALATON Zoltan, 2020/06/15
- [PATCH v2 3/8] sm501: Ignore no-op blits, BALATON Zoltan, 2020/06/15
- [PATCH v2 8/8] sm501: Convert debug printfs to traces, BALATON Zoltan, 2020/06/15
- [PATCH v2 6/8] sm501: Use stn_he_p/ldn_he_p instead of switch/case, BALATON Zoltan, 2020/06/15
- [PATCH v2 7/8] sm501: Do not allow guest to set invalid format, BALATON Zoltan, 2020/06/15
- Re: [PATCH v2 7/8] sm501: Do not allow guest to set invalid format,
Peter Maydell <=
- [PATCH v2 1/8] sm501: Fix bounds checks, BALATON Zoltan, 2020/06/15