linux-kernel - Re: [PATCH v3 2/2] drm/amdgpu: Fix integer overflow in amdgpu_cs

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Date:   Thu, 27 Apr 2023 15:44:39 +0800
From:   whitehat002 whitehat002 <hackyzh002@...il.com>
To:     alexander.deucher@....com
Cc:     christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, sumit.semwal@...aro.org,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v3 2/2] drm/amdgpu: Fix integer overflow in amdgpu_cs_pass1

hello
What is the current status of this patch, has it been applied?


hackyzh002 <hackyzh002@...il.com> 于2023年4月19日周三 20:23写道：
>
> The type of size is unsigned int, if size is 0x40000000, there will
> be an integer overflow, size will be zero after size *= sizeof(uint32_t),
> will cause uninitialized memory to be referenced later.
>
> Signed-off-by: hackyzh002 <hackyzh002@...il.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 08eced097..89bcacc65 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -192,7 +192,7 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
>         uint64_t *chunk_array_user;
>         uint64_t *chunk_array;
>         uint32_t uf_offset = 0;
> -       unsigned int size;
> +       size_t size;
>         int ret;
>         int i;
>
> --
> 2.34.1
>