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Thu, 23 Jul 2026 13:22:16 -0700 (PDT) From: Zhao Li To: Johannes Berg Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] wifi: cfg80211: publish PMSR request before starting the driver Date: Fri, 24 Jul 2026 04:22:09 +0800 Message-ID: <20260723202209.98437-1-enderaoelyther@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <3552acdf7839106b152edfd13502684306ea42a3.camel@sipsolutions.net> References: <3552acdf7839106b152edfd13502684306ea42a3.camel@sipsolutions.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Thu, 23 Jul 2026 at 10:18:33 +0200, Johannes Berg wrote: > However, I don't think it makes sense to actually *document* that it's > now possible - it's only possible from the kernel's locking POV, from > userspace's POV it's still highly confusing at best, and it makes no > sense semantically either. Agreed. I'll drop the kernel-doc changes. Documenting it implies it's a supported semantic when it's really just a locking side effect. > That comment then should call out how it's really about preventing races > with drivers from doing UAF (we could technically be preempted here too), > rather than making that sound like a reasonable order - just saying "Under > races and/or broken drivers immediate completion might free it ..." or > something along those lines would be better I think. Exactly. I'll reword the comment to frame it as defensive against races and broken drivers, not as an intentional ordering. Will send a v2. Thanks, Zhao