linux-kernel - Re: mainline build failure due to e240e53ae0ab ("mm, slub: add CONFIG_SLUB

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Date:   Tue, 13 Dec 2022 10:39:30 +0000
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: mainline build failure due to e240e53ae0ab ("mm, slub: add CONFIG_SLUB_TINY")

On Tue, 13 Dec 2022 at 10:26, Sudip Mukherjee (Codethink)
<sudipm.mukherjee@...il.com> wrote:
>
> Hi All,
>
> The latest mainline kernel branch fails to build xtensa allmodconfig
> with gcc-11 with the error:

And, also powerpc allmodconfig with the error:

fs/f2fs/inline.c: In function 'f2fs_move_inline_dirents':
./include/linux/fortify-string.h:59:33: error: '__builtin_memset'
pointer overflow between offset [28, 898293814] and size [-898293787,
-1] [-Werror=array-bounds]
   59 | #define __underlying_memset     __builtin_memset
      |                                 ^
./include/linux/fortify-string.h:337:9: note: in expansion of macro
'__underlying_memset'
  337 |         __underlying_memset(p, c, __fortify_size);
         \
      |         ^~~~~~~~~~~~~~~~~~~
./include/linux/fortify-string.h:345:25: note: in expansion of macro
'__fortify_memset_chk'
  345 | #define memset(p, c, s) __fortify_memset_chk(p, c, s,
         \
      |                         ^~~~~~~~~~~~~~~~~~~~
fs/f2fs/inline.c:430:9: note: in expansion of macro 'memset'
  430 |         memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap -
src.nr_bitmap);
      |         ^~~~~~

Note: the powerpc failure is also with gcc-11 only. gcc-12 builds fine.


-- 
Regards
Sudip