From: Kees Cook <keescook@chromium.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: linux-kernel@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev,
linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org,
clang-built-linux@googlegroups.com,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2 45/63] ath11k: Use memset_startat() for clearing queue descriptors
Date: Thu, 19 Aug 2021 09:25:01 -0700 [thread overview]
Message-ID: <202108190923.30FD4FC6E@keescook> (raw)
In-Reply-To: <87eeapbmhi.fsf@tynnyri.adurom.net>
On Thu, Aug 19, 2021 at 04:19:37PM +0300, Kalle Valo wrote:
> Kees Cook <keescook@chromium.org> writes:
>
> > In preparation for FORTIFY_SOURCE performing compile-time and run-time
> > field bounds checking for memset(), avoid intentionally writing across
> > neighboring fields.
> >
> > Use memset_startat() so memset() doesn't get confused about writing
> > beyond the destination member that is intended to be the starting point
> > of zeroing through the end of the struct. Additionally split up a later
> > field-spanning memset() so that memset() can reason about the size.
> >
> > Cc: Kalle Valo <kvalo@codeaurora.org>
> > Cc: "David S. Miller" <davem@davemloft.net>
> > Cc: Jakub Kicinski <kuba@kernel.org>
> > Cc: ath11k@lists.infradead.org
> > Cc: linux-wireless@vger.kernel.org
> > Cc: netdev@vger.kernel.org
> > Signed-off-by: Kees Cook <keescook@chromium.org>
>
> To avoid conflicts I prefer taking this via my ath tree.
The memset helpers are introduced as part of this series, so that makes
things more difficult. Do you want me to create a branch with the
helpers that you can merge?
-Kees
--
Kees Cook
--
ath11k mailing list
ath11k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath11k
next prev parent reply other threads:[~2021-08-19 16:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210818060533.3569517-1-keescook@chromium.org>
2021-08-18 6:05 ` [PATCH v2 45/63] ath11k: Use memset_startat() for clearing queue descriptors Kees Cook
2021-08-19 13:19 ` Kalle Valo
2021-08-19 16:25 ` Kees Cook [this message]
2021-08-21 10:17 ` Kalle Valo
2021-08-22 8:11 ` Kees Cook
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