linux-hardening - Re: [PATCH 00/17] Enable strict compile-time memcpy() fortify checks

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Date:   Tue, 14 Dec 2021 20:26:43 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/17] Enable strict compile-time memcpy() fortify checks

On Mon, Dec 13, 2021 at 02:33:14PM -0800, Kees Cook wrote:
> Hi,
> 
> This is "phase 2" (of several phases) to hardening the kernel against
> memcpy-based buffer overflows. With nearly all compile-time fixes
> landed, the next step is to turn on the warning globally to keep future
> compile-time issues from happening, and let us take the step towards
> run-time checking (and towards a new API for flexible array structures).
> 
> This series is based on latest linux-next, and several patches here
> have already been taken by subsystem maintainers but haven't appeared
> in linux-next yet, and are noted below.

I took the RDMA patches to the rdma tree:

>     RDMA/mlx5: Use memset_after() to zero struct mlx5_ib_mr
>     iw_cxgb4: Use memset_startat() for cpl_t5_pass_accept_rpl
>     IB/mthca: Use memset_startat() for clearing mpt_entry

I needed rc5 to come out before I could take the mlx5 patch

Thanks,
Jason