From: Linus Walleij <linus.walleij@linaro.org>
To: Kees Cook <keescook@chromium.org>
Cc: Arend van Spriel <aspriel@gmail.com>,
Franky Lin <franky.lin@broadcom.com>,
Hante Meuleman <hante.meuleman@broadcom.com>,
Kalle Valo <kvalo@kernel.org>,
Chi-hsien Lin <chi-hsien.lin@infineon.com>,
Ian Lin <ian.lin@infineon.com>,
Johannes Berg <johannes.berg@intel.com>,
Wright Feng <wright.feng@cypress.com>,
Hector Martin <marcan@marcan.st>,
linux-wireless@vger.kernel.org,
brcm80211-dev-list.pdl@broadcom.com,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Jisoo Jang <jisoo.jang@yonsei.ac.kr>,
Hans de Goede <hdegoede@redhat.com>,
Aloka Dixit <quic_alokad@quicinc.com>,
John Keeping <john@keeping.me.uk>,
Jeff Johnson <quic_jjohnson@quicinc.com>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH] wifi: brcmfmac: Adjust n_channels usage for __counted_by
Date: Sat, 27 Jan 2024 17:37:25 +0100 [thread overview]
Message-ID: <CACRpkdbpQNoh_ESB=CcUcP0_pcvDYCs9FeJ_wY74a7WJ77sLBg@mail.gmail.com> (raw)
In-Reply-To: <20240126223150.work.548-kees@kernel.org>
On Fri, Jan 26, 2024 at 11:31 PM Kees Cook <keescook@chromium.org> wrote:
> After commit e3eac9f32ec0 ("wifi: cfg80211: Annotate struct
> cfg80211_scan_request with __counted_by"), the compiler may enforce
> dynamic array indexing of req->channels to stay below n_channels. As a
> result, n_channels needs to be increased _before_ accessing the newly
> added array index. Increment it first, then use "i" for the prior index.
> Solves this warning in the coming GCC that has __counted_by support:
Makes perfect sense.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
next prev parent reply other threads:[~2024-01-27 16:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-26 22:31 [PATCH] wifi: brcmfmac: Adjust n_channels usage for __counted_by Kees Cook
2024-01-27 13:15 ` Hans de Goede
2024-01-27 16:37 ` Linus Walleij [this message]
2024-01-27 17:00 ` Gustavo A. R. Silva
2024-02-01 10:04 ` Kalle Valo
2024-02-02 9:58 ` Arend Van Spriel
2024-02-02 10:00 ` Arend Van Spriel
2024-02-02 10:34 ` Kalle Valo
2024-02-02 18:08 ` Arend Van Spriel
2024-02-02 16:45 ` Kalle Valo
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