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From: "dac324 at yahoo dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/102361] Errors compiling Linux kernel 5.14 with
 CONFIG_FORTIFY=y
Date: Fri, 17 Sep 2021 07:24:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102361

--- Comment #13 from DAC324 <dac324 at yahoo dot de> ---
Sorry for duplicate reporting. For me, the error message=20

'__write_overflow' declared with attribute error: detected write beyond siz=
e of
object passed as 1st parameter

and its counterpart=20

'__read_overflow2' declared with attribute error: detected read beyond size=
 of
object passed as 2nd parameter

did not point me to using=20

fnsplit fragment with __attribute__((__error__))

as a correct search term, in the first instance.
Please apologize for the inconvenience.=20

Just FYI (although I assume you know this already):

With CONFIG_FORTIFY=3Dn, you will be able to build the kernel but it will n=
ot run
satisfactorily, if able to boot at all.=