Re: crypto/ahash.c:1073:1: warning: the frame size of 1040 bytes is larger than 1024 bytes

[Geert Uytterhoeven]

On Sat, 9 May 2026 at 19:07, kernel test robot <lkp@xxxxxxxxx> wrote:
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   ec89572766744e844df24c27d31c97b4c00f4e07
> commit: 9d9b193ed73a65ec47cf1fd39925b09da8216461 crypto: hash - Increase HASH_MAX_DESCSIZE for hmac(sha3-224-s390)
> date:   9 months ago
> config: mips-eyeq5_defconfig (https://download.01.org/0day-ci/archive/20260510/202605100125.l4JVHppO-lkp@xxxxxxxxx/config)
> compiler: mips64-linux-gcc (GCC) 15.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260510/202605100125.l4JVHppO-lkp@xxxxxxxxx/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Fixes: 9d9b193ed73a ("crypto: hash - Increase HASH_MAX_DESCSIZE for hmac(sha3-224-s390)")
> | Reported-by: kernel test robot <lkp@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202605100125.l4JVHppO-lkp@xxxxxxxxx/
>
> All warnings (new ones prefixed by >>):
>
>    crypto/ahash.c: In function 'crypto_hash_digest':
> >> crypto/ahash.c:1073:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
>     1073 | }
>          | ^

This is one of the few defconfigs that still use CONFIG_FRAME_WARN=1024.
The default value for 32-bit systems was lifted from 1024 to 1280 in
commit 32115734c0ed8b46 ("Increase the default 32-bit build frame size
warning limit to 1280 bytes") in v6.18, so perhaps the downgrade to
1024 should be dropped from the following defconfigs:

$ git grep CONFIG_FRAME_WARN=1024
arch/mips/configs/eyeq5_defconfig:CONFIG_FRAME_WARN=1024
arch/mips/configs/eyeq6_defconfig:CONFIG_FRAME_WARN=1024
arch/mips/configs/eyeq6lplus_defconfig:CONFIG_FRAME_WARN=1024
arch/mips/configs/lemote2f_defconfig:CONFIG_FRAME_WARN=1024
arch/mips/configs/loongson2k_defconfig:CONFIG_FRAME_WARN=1024
arch/powerpc/configs/fsl-emb-nonhw.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/arm.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/armeb.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/i686.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/m68k.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/mips.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/mipsel.config:CONFIG_FRAME_WARN=1024
tools/testing/selftests/wireguard/qemu/arch/powerpc.config:CONFIG_FRAME_WARN=1024

I am not sure about the wireguard selftests: they might use the lower
value deliberately for testing?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds