linux-kernel - Re: [PATCH] drm/radeon: fix array out-of-bounds read and write issues

Open Source and information security mailing list archives

Message-ID: <CADnq5_NGQzU6rrrqO4iXTHPSxpAt-w0ayxfrS0jj3K8u38f3hg@mail.gmail.com>
Date:   Wed, 24 Jun 2020 11:19:16 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>, kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/radeon: fix array out-of-bounds read and write issues

Applied.  Thanks!

Alex

On Wed, Jun 24, 2020 at 8:07 AM Colin King <colin.king@...onical.com> wrote:
>
> From: Colin Ian King <colin.king@...onical.com>
>
> There is an off-by-one bounds check on the index into arrays
> table->mc_reg_address and table->mc_reg_table_entry[k].mc_data[j] that
> can lead to reads and writes outside of arrays. Fix the bound checking
> off-by-one error.
>
> Addresses-Coverity: ("Out-of-bounds read/write")
> Fixes: cc8dbbb4f62a ("drm/radeon: add dpm support for CI dGPUs (v2)")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/gpu/drm/radeon/ci_dpm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
> index 134aa2b01f90..86ac032275bb 100644
> --- a/drivers/gpu/drm/radeon/ci_dpm.c
> +++ b/drivers/gpu/drm/radeon/ci_dpm.c
> @@ -4351,7 +4351,7 @@ static int ci_set_mc_special_registers(struct radeon_device *rdev,
>                                         table->mc_reg_table_entry[k].mc_data[j] |= 0x100;
>                         }
>                         j++;
> -                       if (j > SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE)
> +                       if (j >= SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE)
>                                 return -EINVAL;
>
>                         if (!pi->mem_gddr5) {
> --
> 2.27.0
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives