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[2a02:3100:9d3f:d01:48c7:5d76:ec6:9dac]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a18e4a3b4asm216792105e9.5.2026.10.10.03.58.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 03:58:49 -0700 (PDT) Date: Sat, 10 Oct 2026 12:58:47 +0200 From: Karl Mehltretter To: Lukasz Luba , "Rafael J . Wysocki" Cc: Changwoo Min , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] PM: EM: allocate the cpumask for every perf domain Message-ID: References: <20260910205234.5392-1-kmehltretter@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260910205234.5392-1-kmehltretter@gmail.com> On Thu, Sep 10, 2026 at 10:52:34PM +0100, Karl Mehltretter wrote: > KASAN reports slab-out-of-bounds reads for both dump and by-ID requests > against a synthetic non-CPU performance domain. > > GET_PERF_DOMAINS does not require GENL_ADMIN_PERM, so an unprivileged > request can reach this path when a GPU or another devfreq device has > registered an energy model. > > Allocate the cpumask for non-CPU domains too. The zeroed mask remains > empty, as required for the documented unused field. > > Fixes: d8eef0453132 ("PM: EM: Implement em_nl_get_pds_doit()") > Cc: stable@vger.kernel.org > Assisted-by: LLM > Signed-off-by: Karl Mehltretter Friendly ping on this patch Thanks, Karl