Re: Build error with kernel from 2026-08-21

[Jiri Kosina]

On Fri, 21 Aug 2026, Juergen Gross wrote:

> > I'm seeing a build error with today's kernel (allyesconfig on x86, using
> > gcc13):
> > 
> > make[3]: *** [/home/gross/linux/head/scripts/Makefile.build:550: drivers]
> > Error 2
> > make[1]: Leaving directory '/home/gross/linux/head/jg/build/x86_32-yes'
> > make[2]: *** [/home/gross/linux/head/Makefile:2193: .] Error 2
> > make[1]: *** [/home/gross/linux/head/Makefile:248: __sub-make] Error 2
> > make: *** [Makefile:248: __sub-make] Error 2
> > [msr]~/linux/head> mk x86_32-yes
> > make O=jg/build/x86_32-yes CC=gcc-13 PYTHON3=python3.11
> > make[1]: Entering directory '/home/gross/linux/head/jg/build/x86_32-yes'
> >   CC      drivers/hid/hid-hyperv.o
> > In file included from /home/gross/linux/head/include/linux/string.h:383,
> >                   from
> >  /home/gross/linux/head/arch/x86/include/asm/page_32.h:18,
> >                   from
> >  /home/gross/linux/head/arch/x86/include/asm/page.h:14,
> >                   from
> >  /home/gross/linux/head/arch/x86/include/asm/processor.h:20,
> >                   from
> >  /home/gross/linux/head/arch/x86/include/asm/timex.h:5,
> >                   from /home/gross/linux/head/include/linux/timex.h:67,
> >                   from /home/gross/linux/head/include/linux/time32.h:13,
> >                   from /home/gross/linux/head/include/linux/time.h:60,
> >                   from /home/gross/linux/head/include/linux/stat.h:19,
> >                   from /home/gross/linux/head/include/linux/module.h:13,
> >                   from /home/gross/linux/head/drivers/hid/hid-hyperv.c:8:
> > In function ʽfortify_memset_chkʼ,
> >     inlined from ʽmousevsc_device_info_valid_descriptorʼ at
> > /home/gross/linux/ head/drivers/hid/hid-hyperv.c:691:2:
> > /home/gross/linux/head/include/linux/fortify-string.h:430:25: error: call to
> > ʽ__write_overflow_fieldʼ declared with attribute warning: detected write
> > beyond size of field (1st parameter); maybe use struct_group()?
> > [-Werror=attribute- warning]
> >    430 |                         __write_overflow_field(p_size_field, size);
> >        |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > In function ʽfortify_memset_chkʼ,
> >     inlined from ʽmousevsc_device_info_report_desc_oobʼ at
> > /home/gross/linux/ head/drivers/hid/hid-hyperv.c:717:2:
> > /home/gross/linux/head/include/linux/fortify-string.h:430:25: error: call to
> > ʽ__write_overflow_fieldʼ declared with attribute warning: detected write
> > beyond size of field (1st parameter); maybe use struct_group()?
> > [-Werror=attribute- warning]
> >    430 |                         __write_overflow_field(p_size_field, size);
> >        |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > cc1: all warnings being treated as errors
> > make[5]: *** [/home/gross/linux/head/scripts/Makefile.build:290:
> > drivers/hid/ hid-hyperv.o] Error 1
> > make[4]: *** [/home/gross/linux/head/scripts/Makefile.build:550:
> > drivers/hid] Error 2
> > make[3]: *** [/home/gross/linux/head/scripts/Makefile.build:550: drivers]
> > Error 2
> > make[2]: *** [/home/gross/linux/head/Makefile:2193: .] Error 2
> > make[1]: Leaving directory '/home/gross/linux/head/jg/build/x86_32-yes'
> > make[1]: *** [/home/gross/linux/head/Makefile:248: __sub-make] Error 2
> > make: *** [Makefile:248: __sub-make] Error 2
> 
> A git bisect flagged commit 83df7b5fa6735b5084ecd296a0f67208650ba497 to be the
> problematic patch.

Hi,

this was reported by syzbot two days ago. I asked it to test a candidate 
fix [1], but it never responded back. Can you give it a quick shot in your 
32bit build environment, please?

Thanks.

[1] https://lore.kernel.org/all/s6r47sn1-pr1p-8s7r-o164-q27s2o40p9r1@xxxxxxxx/

-- 
Jiri Kosina
SUSE Labs