linux-kernel - Re: arch/powerpc/crypto/aes-gcm-p10-glue.c:121:9: error: 'gcm_init_htable' accessing 256 bytes in a region of size 224

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Date:   Fri, 17 Nov 2023 18:22:52 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     kernel test robot <lkp@...el.com>
Cc:     Danny Tsen <dtsen@...ux.ibm.com>, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>
Subject: Re: arch/powerpc/crypto/aes-gcm-p10-glue.c:121:9: error:
 'gcm_init_htable' accessing 256 bytes in a region of size 224

On Sun, Oct 29, 2023 at 12:54:22AM +0800, kernel test robot wrote:
>
>    arch/powerpc/crypto/aes-gcm-p10-glue.c: In function 'gcmp10_init':
> >> arch/powerpc/crypto/aes-gcm-p10-glue.c:121:9: error: 'gcm_init_htable' accessing 256 bytes in a region of size 224 [-Werror=stringop-overflow=]
>      121 |         gcm_init_htable(hash->Htable+32, hash->H);
>          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    arch/powerpc/crypto/aes-gcm-p10-glue.c:121:9: note: referencing argument 1 of type 'unsigned char[256]'
>    arch/powerpc/crypto/aes-gcm-p10-glue.c:121:9: note: referencing argument 2 of type 'unsigned char[16]'
>    arch/powerpc/crypto/aes-gcm-p10-glue.c:41:17: note: in a call to function 'gcm_init_htable'
>       41 | asmlinkage void gcm_init_htable(unsigned char htable[256], unsigned char Xi[16]);
>          |                 ^~~~~~~~~~~~~~~
>    cc1: all warnings being treated as errors

Danny, can you please look into this error?

Perhaps htable should be changed to 224?

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt