linux-kernel - Re: [PATCH] crypto: virtio/akcipher

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Message-ID: <ZcWxfRvhF002qLb/@gondor.apana.org.au>
Date: Fri, 9 Feb 2024 13:00:45 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: zhenwei pi <pizhenwei@...edance.com>
Cc: arei.gonglei@...wei.com, mst@...hat.com, jasowang@...hat.com,
	xuanzhuo@...ux.alibaba.com, virtualization@...ts.linux.dev,
	nathan@...nel.org, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy

On Tue, Jan 30, 2024 at 07:27:40PM +0800, zhenwei pi wrote:
> sizeof(struct virtio_crypto_akcipher_session_para) is less than
> sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from
> stack variable leads stack overflow. Clang reports this issue by
> commands:
> make -j CC=clang-14 mrproper >/dev/null 2>&1
> make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1
> make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/
>   virtio_crypto_akcipher_algs.o
> 
> Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm")
> Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/
> Signed-off-by: zhenwei pi <pizhenwei@...edance.com>
> ---
>  drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

Patch applied.  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