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

[Jürgen Groß]

On 21.08.26 10:41, Jiri Kosina wrote:
> 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 ‘fortify_memset_chk’,
> > >      inlined from ‘mousevsc_device_info_valid_descriptor’ 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
> > > ‘__write_overflow_field’ 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 ‘fortify_memset_chk’,
> > >      inlined from ‘mousevsc_device_info_report_desc_oob’ 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
> > > ‘__write_overflow_field’ 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/

No, doesn't work.


Juergen

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