linux-hardening - Re: [PATCH][next] RDMA/mlx4: Copy union directly

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Date:   Wed, 16 Aug 2023 09:32:30 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Yishai Hadas <yishaih@...dia.com>, Jason Gunthorpe <jgg@...pe.ca>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] RDMA/mlx4: Copy union directly


On Tue, 15 Aug 2023 14:39:53 -0600, Gustavo A. R. Silva wrote:
> Copy union directly instead of using memcpy().
> 
> Note that in this case, a direct assignment is more readable and
> consistent with the subsequent assignments.
> 
> This addresses the following -Wstringop-overflow warning seen in s390
> with defconfig:
> drivers/infiniband/hw/mlx4/main.c:296:33: warning: writing 16 bytes into a region of size 0 [-Wstringop-overflow=]
>   296 |                                 memcpy(&port_gid_table->gids[free].gid,
>       |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   297 |                                        &attr->gid, sizeof(attr->gid));
>       |                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Applied, thanks!

[1/1] RDMA/mlx4: Copy union directly
      https://git.kernel.org/rdma/rdma/c/18ddaeb03bdb65

Best regards,
-- 
Leon Romanovsky <leon@...nel.org>