Build error with kernel from 2026-08-21

Juergen Gross <[email protected]> Fri, 21 Aug 2026 08:38:35 +0200
Newsgroups	org.kernel.vger.linux-kernel
Message-ID	<[email protected]>
Hi,

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


Juergen
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