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 2CC3D63B8 for ; Mon, 20 Feb 2023 13:50:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ABF06C433D2; Mon, 20 Feb 2023 13:50:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1676901007; bh=oxUzyqrDggtkvJ6iEXjKmxR6AHlHq1tf6E9HAMWOY4g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RUH5xF/vLSQirNPzjFwqHzBC/T+0KfVYP2Si2bxjbRym37zWpRbcA0s1f+VCztOyU XlI57cDTJ+xVcah0iIvvEtSomfjXSrpHzc+7akXes/42brhQdgVOY6joLyj4cYIvwm RHFRDY22bl8ybc5mbXNbLiWSkOfaMRsQj0wrRztE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Natalia Petrova , Jesse Brandeburg , Tony Nguyen , Jakub Kicinski , Sasha Levin , Gurucharan G Subject: [PATCH 5.4 151/156] i40e: Add checking for null for nlmsg_find_attr() Date: Mon, 20 Feb 2023 14:36:35 +0100 Message-Id: <20230220133608.960925294@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230220133602.515342638@linuxfoundation.org> References: <20230220133602.515342638@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Natalia Petrova [ Upstream commit 7fa0b526f865cb42aa33917fd02a92cb03746f4d ] The result of nlmsg_find_attr() 'br_spec' is dereferenced in nla_for_each_nested(), but it can take NULL value in nla_find() function, which will result in an error. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 51616018dd1b ("i40e: Add support for getlink, setlink ndo ops") Signed-off-by: Natalia Petrova Reviewed-by: Jesse Brandeburg Tested-by: Gurucharan G (A Contingent worker at Intel) Signed-off-by: Tony Nguyen Link: https://lore.kernel.org/r/20230209172833.3596034-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 1226b4fdbeac0..3f983d69f10eb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -12535,6 +12535,8 @@ static int i40e_ndo_bridge_setlink(struct net_device *dev, } br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); + if (!br_spec) + return -EINVAL; nla_for_each_nested(attr, br_spec, rem) { __u16 mode; -- 2.39.0