From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=74.125.82.43 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794211899; b=LW5B+rim4ZV97axf1OQZ0rBK5AK1qJZLMNvXRPDHgI3wRTbCt3CsDhOu0w2cmxI6ZHmN DlCCaOsfAg4WqLO89p605ZChXqC7/yezC76FGbGh7z/m5ucPzTQ7gQDIDTn8tKVNEnt// 6//6HvAzfQApgXd6p2cKsvZ2HsF4FtYYm9is8XMNRXIyXPx0o2tQbny0gAyZXBkqdiDSq 5UpnxtQqPSShxbMuqbzck8yg3Dpz8wmoQeJQVNK4yBsaRknDB6aHqWAt61g9BG77zxW8p B2StFkLM2t/dY/M6MHz2qZ+w0mcQbnhnz0seQjA/wvq0npysDAPYf4yfUdHcEhFpYxQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794211899; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; bh=mKhvsObZrPPQtj6ZJlFblKsUPwWm8d6ZB8vx+wF7BDc=; b=eb03vOMJonC1Yoq4hsHR0Le7xO5K2kRbuYQ/VxGcFKsNgp1iPfqBQxs14C0INJYsEjkd wQwI/WspWbSF9x7TOITwSVojVbWpNm/c7hpmweTnqQ1pqGM1uRJcjepIlRdYIi3xEVNWr 43dcl+jCUCL45pvegwrXZWcISEkYPZAKYr7+LPBJ6iuAHPEOCc2sP4b8/w+XvlCfNFzxe ZskbhsLHT40bniptHC7D4EtU/FMBIRMeEO13HzaenxU7tKo/CeRZOD93CJSHYDboRbSYC Eu9vFVmGcKRuB4asXUIPHsJnD1WuYEjUt6wtqj5Sgxk/tNRdU5GmjUBYYEVdNFo/axQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=V6fCsRA0; arc=none smtp.remote-ip=74.125.82.43 Received: from mail-dl1-f43.google.com (mail-dl1-f43.google.com [74.125.82.43]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A5732606A323 for ; Mon, 9 Nov 2026 08:11:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org A5732606A323 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=V6fCsRA0 Received: by mail-dl1-f43.google.com with SMTP id a92af1059eb24-1b3acec6677so639387c88.1 for ; Mon, 09 Nov 2026 00:11:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20260707; t=1794211898; x=1794816698; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=mKhvsObZrPPQtj6ZJlFblKsUPwWm8d6ZB8vx+wF7BDc=; b=V6fCsRA0dFS4v9KdWGpEZHQGeDkNgijAvP/htZHms/bgPnMY3z6Ha/VGR+qRiB/tZT yeUl+8vboUTroog8qizr4aT5JoSzsb1A9B+hx5IlTjyhSrO1fINSwSsAEOdJzBALMIoW IF5gpSB6p+cw1lbtglErG6nL2UspWIuSsX54ttj0B088MtYFVgkKUcNBULAIXFB7HvzR WbfqX/V5w9Zb21QDeVu8I3dMvjovmxN1fr8oThYR84B73vwdw8Lik/euRdH2gvc1Uln4 n5WuThlOsRoGWuuqVn7sq1OQUn5Ex24bBrl/OXDYOzWV+XRyWaq5P0gEPmNTsjIjPKCl RzPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1794211898; x=1794816698; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=mKhvsObZrPPQtj6ZJlFblKsUPwWm8d6ZB8vx+wF7BDc=; b=rXuQYPyt+eZ9XSUc109JDG5TsHVlybsMIIMnhQ8Ib5Dxz2qQ3Pb3gegFmjeYb01VD3 /HX6wNH7m80bJvpFZe3vMgyGhwjecpwv9jPkNu96YSNVZBBDSFSbKba4QchhzB2sCy7D n3kPIF7Hrg7BKhJvWQC23g8XlfGkkxOVZeR8J9h8tZ7bKsZUxH9DekHOoTrW0YgysryA lwjDBl2Alk4HaBwvYkSwPkejH+yS6KqdbVwvA7vpCCqiJLLfVUoo1n1xudN/gINMdeBX 8i5cd/tXJj6Us2QIpi61YhDBYIHsgvBzVDQPdlfsRAJ0+ccmc4GCv6FBlcQavsKgD7sC EGAA== X-Forwarded-Encrypted: i=1; AL+hErHpYB+zV5c5px1+jEDBhQHN2oEvcyduMgd5B2p4FiTXYCGoKJaSbaK+8ySet5824J/JhnP4mQk=@vger.kernel.org X-Gm-Message-State: APuU4Z/rCIbuuVMYTOimWVGuzFfWkGWC29m9gAsWFilQTNpF191vbEEn CFJQN1li/KtrBfkhHZEZl73oJRRvwQliPn0OwhtK1/IPg69Kl+bcUMz+KqD34A== X-Gm-Gg: AYBFou0zTs7AEoNpfGlDur4aIvbzOSo3Iv3kp1yIQm2pw4q1SXvVVLXZc3orAYnra0Y ZJ68c/xGJXvHHZaFrAigprxf2+hZvEhcVxu5z2lKqDmxTWVGNZq3CXVDBZrEfUO56rClS7/u0tq us6avfiN+4jNzxIWHPDDokrcoyzASBdodVnpPGySroW+QjyS5VyoiNPKDj017qeApLx3zS1yuSS Ao7MoKc9I4O8+SsaAZsQCOrQMhjVOBZ4gLxYDtMyQSBoIy0Yy4BuHnHjSuRVzuBI6+pRKmJzZOE iUsHWFqX/VNpEVWbPINUdAwApDQU6+DoJazD21xuC9tlf2JNcRyGLFbrDxJvYlzKDiv/kDrCJN6 DDKuUfejKoHTfIULHtX2V3fhYt3ogIciGr6YtyfLMza302Jt29LWGsk1F92LZcsL6jJ2Bg6OJqO DkMQw3RdJDGhePfpHD9v4eXAksHkKsCpm2B+6RCE5DrTQnHwiScuUr19QqiznSs/r/snneMTMl7 quYDZBvaJx9QV+LwaqFvWk3IUo2IlU4/H+C822TkglIz2IkKBmeWIghr2NaN1K5m/I1SV96m1R1 68AOf2uOrYdMdC804YwPlk++p/HaoLHdClCOxCWGz2W0Cwutt3Pk1uJkyhuVrpX8ybCx X-Received: by 2002:a05:7301:da0a:b0:36a:1434:c691 with SMTP id 5a478bee46e88-37256bed190mr5906511eec.14.1794211897671; Mon, 09 Nov 2026 00:11:37 -0800 (PST) Received: from google.com ([2a00:79e0:2ebe:8:3588:b56:78bf:db5e]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-37265618e11sm10757848eec.7.2026.11.09.00.11.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 00:11:36 -0800 (PST) Date: Mon, 9 Nov 2026 00:11:34 -0800 From: Dmitry Torokhov To: Guanglei Zhu Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, liuc63@xiaopeng.com, stable@vger.kernel.org Subject: Re: [PATCH v2] Input: tegra-kbc - check the pin numbers from the device tree Message-ID: References: <20261103084135.426629-7-zhugl3@xiaopeng.com> <20261105021303.4206-1-zhugl3@xiaopeng.com> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261105021303.4206-1-zhugl3@xiaopeng.com> On Thu, Nov 05, 2026 at 10:13:03AM +0800, Guanglei Zhu wrote: > The row and column pin lists are read straight from the device tree > and used to index the pin configuration array: > > for (i = 0; i < num_rows; i++) { > kbc->pin_cfg[rows_cfg[i]].type = PIN_CFG_ROW; > kbc->pin_cfg[rows_cfg[i]].num = i; > } > > The helper only limits how many entries it reads, not what they > contain. Not all Tegra variants have KBC_MAX_GPIO pins - Tegra114, > for example, has 11 rows + 8 columns = 19 - and the setup loop only > initializes pin_cfg[] up to kbc->num_rows_and_columns, so a device > tree that names a pin the variant does not have makes the row and > column stores write over pin_cfg entries that were never touched, > and the later check_pin_cfg() walk reads that stale data back as > valid configuration. > > Reject pin numbers the variant does not have. > > Fixes: 88390243a993 ("Input: tegra-kbc - add support for rows/columns configuration from dt") > Cc: stable@vger.kernel.org > Signed-off-by: Guanglei Zhu Applied, thank you (but dropped stable). -- Dmitry