Build regressions/improvements in v5.16-rc1

[Kees Cook]

On Mon, Nov 15, 2021 at 05:44:33PM +0100, Marco Elver wrote:
> On Mon, Nov 15, 2021 at 05:12PM +0100, Geert Uytterhoeven wrote:
> [...]
> > >   + /kisskb/src/include/linux/fortify-string.h: error: call to '__read_overflow' declared with attribute error: detected read beyond size of object (1st parameter):  => 263:25, 277:17
> > 
> >     in lib/test_kasan.c
> > 
> > s390-all{mod,yes}config
> > arm64-allmodconfig (gcc11)
> 
> Kees, wasn't that what [1] was meant to fix?
> [1] https://lkml.kernel.org/r/20211006181544.1670992-1-keescook@chromium.org

[1] fixed the ones I found when scanning for __write_overflow(). [2]
fixed some others, so it's possible there are yet more to fix?

Taking a look at Linus's tree, though, the "263" and "277" lines don't
line up correctly. I'll go see if I can reproduce this. Is this with
W=1?

-Kees

[2] https://www.ozlabs.org/~akpm/mmotm/broken-out/kasan-test-consolidate-workarounds-for-unwanted-__alloc_size-protection.patch


-- 
Kees Cook