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Message-ID: <20190815131935.GA21644@kroah.com>
Date: Thu, 15 Aug 2019 15:19:35 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Paul Menzel <pmenzel@...gen.mpg.de>, x86@...nel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: warning: ‘memset’ offset [197, 448] from the object at ‘boot_params’ is out of the bounds of referenced subobject ‘ext_ramdisk_image’ with type, ‘unsigned int’ at offset 192 [-Warray-bounds]
On Thu, Aug 15, 2019 at 02:54:32PM +0200, Thomas Gleixner wrote:
> 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 ‘sanitize_boot_params’,
> > > inlined from ‘copy_bootdata’ at arch/x86/kernel/head64.c:391:2:
> > > ./arch/x86/include/asm/bootparam_utils.h:40:3: warning: ‘memset’ offset [197, 448] from the object at ‘boot_params’ is out of the bounds of referenced subobject ‘ext_ramdisk_image’ with type
> > > ‘unsigned int’ 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: ‘memset’ offset [493, 497] from the object at ‘boot_params’ is out of the bounds of referenced subobject ‘kbd_status’ with type ‘unsig
> > > ned char’ 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....
Please do, it's the only build warning I currently have for
'allmodconfig' on x86 for 4.14.y, 4.19.y, and 5.2.y and is annoying :)
thanks,
greg k-h
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