Re: warning: âmemsetâ offset [197, 448] from the object at âboot_paramsâ is out of the bounds of referenced subobject âext_ramdisk_imageâ with type, âunsigned intâ at offset 192 [-Warray-bounds]

[Greg KH]

On Tue, Aug 13, 2019 at 06:15:51PM +0200, Paul Menzel wrote:
> Dear Linux folks,
> 
> 
> No idea, if you are interested in these reports. Building Linux 5.3-rc4,
> GCC 9.2.0 shows the warning below.
> 
> ```
> In file included from arch/x86/kernel/head64.c:35:
> In function âsanitize_boot_paramsâ,
>     inlined from âcopy_bootdataâ at arch/x86/kernel/head64.c:391:2:
> ./arch/x86/include/asm/bootparam_utils.h:40:3: warning: âmemsetâ offset [197, 448] from the object at âboot_paramsâ is out of the bounds of referenced subobject âext_ramdisk_imageâ with type
>  âunsigned intâ at offset 192 [-Warray-bounds]
>    40 |   memset(&boot_params->ext_ramdisk_image, 0,
>       |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    41 |          (char *)&boot_params->efi_info -
>       |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    42 |    (char *)&boot_params->ext_ramdisk_image);
>       |    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ./arch/x86/include/asm/bootparam_utils.h:43:3: warning: âmemsetâ offset [493, 497] from the object at âboot_paramsâ is out of the bounds of referenced subobject âkbd_statusâ with type âunsig
> ned charâ at offset 491 [-Warray-bounds]
>    43 |   memset(&boot_params->kbd_status, 0,
>       |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    44 |          (char *)&boot_params->hdr -
>       |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    45 |          (char *)&boot_params->kbd_status);
>       |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ```

Yeah, it shows up on my builds as well :(

Any chance you can make a fix for this?

thanks,

greg k-h