2022-03-02 06:49:45

by Rudraksha Gupta

Subject: MSM8960: gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is outside, array bounds of 'const u8[6]'

Hi all,


I am getting this warning when compiling the kernel for the MSM8960 with
this defconfig:
https://raw.githubusercontent.com/apq8064-mainline/linux/qcom-apq8064-next/arch/arm/configs/qcom_apq8064_defconfig


Warning:

../drivers/gpu/drm/dp/drm_dp.c: In function
'drm_dp_get_adjust_request_post_cursor':
../drivers/gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is
outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'}
[-Warray-bounds]
   59 |         return link_status[r - DP_LANE0_1_STATUS];
      |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
../drivers/gpu/drm/dp/drm_dp.c:210:51: note: while referencing 'link_status'
  210 | u8 drm_dp_get_adjust_request_post_cursor(const u8
link_status[DP_LINK_STATUS_SIZE],
      | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

2022-03-02 12:43:55

by Jani Nikula

Subject: Re: MSM8960: gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is outside, array bounds of 'const u8[6]'

On Tue, 01 Mar 2022, Rudraksha Gupta <[email protected]> wrote:
> Hi all,
>
>
> I am getting this warning when compiling the kernel for the MSM8960 with
> this defconfig:
> https://raw.githubusercontent.com/apq8064-mainline/linux/qcom-apq8064-next/arch/arm/configs/qcom_apq8064_defconfig
>
>
> Warning:
>
> ../drivers/gpu/drm/dp/drm_dp.c: In function
> 'drm_dp_get_adjust_request_post_cursor':
> ../drivers/gpu/drm/dp/drm_dp.c:59:27: warning: array subscript 10 is
> outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'}
> [-Warray-bounds]
>    59 |         return link_status[r - DP_LANE0_1_STATUS];
>       |                ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
> ../drivers/gpu/drm/dp/drm_dp.c:210:51: note: while referencing 'link_status'
>   210 | u8 drm_dp_get_adjust_request_post_cursor(const u8
> link_status[DP_LINK_STATUS_SIZE],
>       | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>

Please see https://lore.kernel.org/r/[email protected]

BR,
Jani.


--
Jani Nikula, Intel Open Source Graphics Center