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Mon, 06 Apr 2026 22:12:20 -0700 (PDT) Received: from google.com ([2a00:79e0:2ebe:8:dd71:7176:b4e4:a7a5]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2ca7c20c151sm15834673eec.19.2026.04.06.22.12.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2026 22:12:20 -0700 (PDT) Date: Mon, 6 Apr 2026 22:12:17 -0700 From: Dmitry Torokhov To: Pengpeng Hou Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kees@kernel.org Subject: Re: [PATCH v2] Input: gf2k: skip invalid hat lookup values Message-ID: References: <20260323074541.93413-1-pengpeng@iscas.ac.cn> <20260407120001.1-gf2k-v2-pengpeng@iscas.ac.cn> Precedence: bulk X-Mailing-List: linux-input@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: <20260407120001.1-gf2k-v2-pengpeng@iscas.ac.cn> On Tue, Apr 07, 2026 at 09:56:52AM +0800, Pengpeng Hou wrote: > gf2k_read() decodes the hat position from a 4-bit field and uses it > directly to index gf2k_hat_to_axis[]. The lookup table only has nine > entries, so malformed packets can read past the end of the fixed table. > > Skip hat reporting when the decoded value falls outside the lookup > table instead of forcing it to the neutral position. This keeps the > fix local and avoids reporting a made-up axis state for malformed > packets. > > Signed-off-by: Pengpeng Hou Applied, thank you. -- Dmitry