From nobody Sun Feb 8 11:22:10 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30EC4C77B7A for ; Thu, 8 Jun 2023 01:25:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232172AbjFHBZx (ORCPT ); Wed, 7 Jun 2023 21:25:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231476AbjFHBZv (ORCPT ); Wed, 7 Jun 2023 21:25:51 -0400 Received: from mail.nfschina.com (unknown [42.101.60.195]) by lindbergh.monkeyblade.net (Postfix) with SMTP id 7E8862103 for ; Wed, 7 Jun 2023 18:25:50 -0700 (PDT) Received: from localhost.localdomain (unknown [180.167.10.98]) by mail.nfschina.com (Maildata Gateway V2.8.8) with ESMTPA id BB7171801125A4; Thu, 8 Jun 2023 09:24:44 +0800 (CST) X-MD-Sfrom: suhui@nfschina.com X-MD-SrcIP: 180.167.10.98 From: Su Hui To: Douglas Anderson , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter Cc: andersson@kernel.org, u.kleine-koenig@pengutronix.de, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Su Hui Subject: [PATCH v3] drm/bridge: ti-sn65dsi86: Avoid possible buffer overflow Date: Thu, 8 Jun 2023 09:24:43 +0800 Message-Id: <20230608012443.839372-1-suhui@nfschina.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Smatch error:buffer overflow 'ti_sn_bridge_refclk_lut' 5 <=3D 5. Fixes: cea86c5bb442 ("drm/bridge: ti-sn65dsi86: Implement the pwm_chip") Signed-off-by: Su Hui Reviewed-by: Douglas Anderson --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge= /ti-sn65dsi86.c index 7a748785c545..4676cf2900df 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -298,6 +298,10 @@ static void ti_sn_bridge_set_refclk_freq(struct ti_sn6= 5dsi86 *pdata) if (refclk_lut[i] =3D=3D refclk_rate) break; =20 + /* avoid buffer overflow and "1" is the default rate in the datasheet. */ + if (i >=3D refclk_lut_size) + i =3D 1; + regmap_update_bits(pdata->regmap, SN_DPPLL_SRC_REG, REFCLK_FREQ_MASK, REFCLK_FREQ(i)); =20 --=20 2.30.2