From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEC127469 for ; Sun, 17 Sep 2023 20:23:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37823C433C8; Sun, 17 Sep 2023 20:23:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694982184; bh=Sl0ev05CArq4Iwp4ljBosJKpu7HXTmJAbOOvlpC0fPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dFfETwqI3zqxHPPP8gjzwYpTpIJAKK479WU1lPn4Q2LFtHGApI8nEekxq2sZNjihF LzBTeeQmUUOcdTix3L3nNGDw1MzxecFR37Bm4vs70fvTeM8EsoQ64emvs6hrJTs/2N +jxfvkh0rkdyWf+eFc/r2e+Jq1lkyNg3eNZLt5IQ= 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 5.15 176/511] drm/amd/pm: fix variable dereferenced issue in amdgpu_device_attr_create() Date: Sun, 17 Sep 2023 21:10:03 +0200 Message-ID: <20230917191118.081849178@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191113.831992765@linuxfoundation.org> References: <20230917191113.831992765@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-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 6aaf1230655f4..73794c1c12082 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -2134,15 +2134,19 @@ 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