From mboxrd@z Thu Jan 1 00:00:00 1970 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 A2C37CA0ECE for ; Mon, 11 Sep 2023 21:56:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354120AbjIKVwc (ORCPT ); Mon, 11 Sep 2023 17:52:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240453AbjIKOoh (ORCPT ); Mon, 11 Sep 2023 10:44:37 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B3BC12A for ; Mon, 11 Sep 2023 07:44:33 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8BBDC433C7; Mon, 11 Sep 2023 14:44:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694443473; bh=/TR8tW2uQLAPbcrQrOX8BeSB7XAhyPkRSh60Bq2y0mE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IcKcR/BpedArwDmXdsLBQYLHa0WsoHJZXWG/lTzjcciHNivQjY55H/cXkbVjaH4m+ PG6kLPSY68APlD4+U++3vZWfxGb5SwvBHjPpJxGkG6brZSo9UgB3LWWped2EDd2ZaB g6J5vFp8WfX7qFt8/6Pduepmf/8wjGcwNyOySzjw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Yang Wang , Kenneth Feng , Alex Deucher , Sasha Levin Subject: [PATCH 6.4 362/737] drm/amd/pm: fix variable dereferenced issue in amdgpu_device_attr_create() Date: Mon, 11 Sep 2023 15:43:41 +0200 Message-ID: <20230911134700.644769632@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230911134650.286315610@linuxfoundation.org> References: <20230911134650.286315610@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yang Wang [ Upstream commit 25e6373a5b8efc623443f2699d2b929bf3067d76 ] - fix variable ('attr') dereferenced issue. - using condition check instead of BUG_ON(). Fixes: 4e01847c38f7 ("drm/amdgpu: optimize amdgpu device attribute code") Cc: Dan Carpenter Signed-off-by: Yang Wang Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/pm/amdgpu_pm.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index f4f40459f22b9..a5b2a7d943f71 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -2195,15 +2195,19 @@ static int amdgpu_device_attr_create(struct amdgpu_device *adev, uint32_t mask, struct list_head *attr_list) { int ret = 0; - struct device_attribute *dev_attr = &attr->dev_attr; - const char *name = dev_attr->attr.name; enum amdgpu_device_attr_states attr_states = ATTR_STATE_SUPPORTED; struct amdgpu_device_attr_entry *attr_entry; + struct device_attribute *dev_attr; + const char *name; int (*attr_update)(struct amdgpu_device *adev, struct amdgpu_device_attr *attr, uint32_t mask, enum amdgpu_device_attr_states *states) = default_attr_update; - BUG_ON(!attr); + if (!attr) + return -EINVAL; + + dev_attr = &attr->dev_attr; + name = dev_attr->attr.name; attr_update = attr->attr_update ? attr->attr_update : default_attr_update; -- 2.40.1