Re: warning: ʽmemsetʼ offset [197, 448] from the object at ʽboot_paramsʼ is out of the bounds of referenced subobject ʽext_ramdisk_imageʼ with type, ʽunsigned intʼ at offset 192 [-Warray-bounds]
From: Thomas Gleixner
Date: Thu Aug 15 2019 - 08:54:39 EST
On Thu, 15 Aug 2019, Greg KH wrote:
> 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?
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/boot&id=a156cadef2fe445ac423670eace517b39a01ccd0
I guess I need to reprioritize that and mark it for stable....