From nobody Mon Feb 9 18:20:05 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D073E176FB1; Mon, 9 Feb 2026 03:45:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770608719; cv=none; b=HX7DCzXqnqhGF6wbgAZGxSr1tbwrD1Cc/PPjVmbyeuyZhR1Psi6qCN02oMDlLnzQtV4bs9Sk4d8Hssy+A+bJu6AVfCo9igz95JP0IC27OSHPtajxV5E62E0/GTbzIMjWt0ZpPk3qzkJ0dR1wlqD0JVrywrYzTBcEtCRsovMo05o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770608719; c=relaxed/simple; bh=UUO/PmxjiCudzz8pg6ivwRhsCGJXpSd3tgxy8uRmPec=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=MRUN57jv627Z19CJsll1An61dVpgdyv+Ub7GYrDaLImSlcXre7DZfDJ5MRuCze2UTM+PELeak5jKpzRIkEN+sYdClTOAZzEEtPVYSVObwGs7466Di9x9UIQM9oB1921US11wdoOp+Ei63qjfWqUoHYvIAAB6hX59e4SSJbyFnVA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost (unknown [124.16.138.129]) by APP-05 (Coremail) with SMTP id zQCowABX7A85WIlpzTDbBw--.62243S2; Mon, 09 Feb 2026 11:44:57 +0800 (CST) From: Chen Ni To: dsimic@manjaro.org Cc: airlied@gmail.com, andy.yan@rock-chips.com, damon.ding@rock-chips.com, dri-devel@lists.freedesktop.org, heiko@sntech.de, hjc@rock-chips.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, simona@ffwll.ch, tzimmermann@suse.de, Chen Ni , stable@vger.kernel.org Subject: [PATCH v2] drm/rockchip: analogix_dp: Add missing error check for platform_get_resource() Date: Mon, 9 Feb 2026 11:31:23 +0800 Message-Id: <20260209033123.1089370-1-nichen@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowABX7A85WIlpzTDbBw--.62243S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF43GFWDAw15AFWrKF4rXwb_yoWkGrX_K3 WxXr45Wr18ZrnYkw43Aw43uFZav3ZI9r4kWa10qFZ3tF1DJF15XFyFvr4Fva4Uta1xAFsx G3WDXr4qgFnxAjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbf8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2 Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFylc2xSY4AK67AK6r48MxAIw28IcxkI7VAKI4 8JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xv wVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6xIIjx v20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20E Y4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267 AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUjm9aPUUUUU== X-CM-SenderInfo: xqlfxv3q6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" Add missing error check for platform_get_resource() return value to prevent NULL pointer dereference when memory resource is not available. Fixes: 718b3bb9c0ab ("drm/rockchip: analogix_dp: Expand device data to supp= ort multiple edp display") Cc: stable@vger.kernel.org Signed-off-by: Chen Ni Reviewed-by: Dragan Simic --- Changes in v2: - Add Reviewed-by tag from Dragan Simic - Add Cc stable tag as suggested --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/= drm/rockchip/analogix_dp-rockchip.c index fdab71d51e2a..3f5be14010c1 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -461,6 +461,8 @@ static int rockchip_dp_probe(struct platform_device *pd= ev) return -ENOMEM; =20 res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; =20 i =3D 0; while (dp_data[i].reg) { --=20 2.25.1