From nobody Fri Dec 19 20:34:09 2025 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 C8AB513774E; Wed, 13 Mar 2024 16:42:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348157; cv=none; b=GHk80/YxjAv3VRLqj6nNzd0LIPlJTfX2K3gQ+UcIqJdhVPMkMRI5A1n6jfP8oX52VassADza3hHqJKiy67YXcwE7r3DQ/HVQwRJW1McDPEAfsyzVaN15no6TBEl5d91WUKXREdL6BMTrMDJO0qxYP1lOS/y4RowaqiOBDu0M4p8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348157; c=relaxed/simple; bh=4FrnG+R/9EakgivZSNNtZb5j+1oO4df+JTS9AuAuvMY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SN6DMe1LRbvbpKqpWBsj/VX1ok7mLJfM4WmRRgTD2WbFZQpWRsL1w8p1lIdptJxlJra7dLFhiwiAtY46nvdkNwj7p1IAv2p/g7+qxMZCG/ydz6jMoF7uIAGrXftyMj9CsNklSCjDkb2WvIkFSMYoyxQqiv9yQfvbKMZBwhclgUQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ijlko+Zn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ijlko+Zn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 70620C4160D; Wed, 13 Mar 2024 16:42:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710348157; bh=4FrnG+R/9EakgivZSNNtZb5j+1oO4df+JTS9AuAuvMY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ijlko+Zn8Oc0sPe4Isu8fhKfx6RqixVDkSeb4fnKvVypjIbM0nRjQgsobZCHscwAH NyVbDKH6M4UmQP37qxo9RhMd9Fgjkd4B3EAnEDdeUW0+W+crJTvQrs5LpoZfe5kpm4 PsUQJJPcXOOnx5wsE2akN+9PVrKhyN0oggLpAm/c+2cPY6BvW9YEWZJqCYntshXMNV BpkMZKWwVqJs4ojzmg9H/v8UIyurbzXTI0mfmlLYEaAZ2tWrOUlw61CKpsTWMq6mo9 szEcWliT1c7+XAZYuc8x5GQS39LKcSL2PN9rq7GbV8rCdUYmzC3wZxKSXbTDgn8xuA mSarRwCQuoXzg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Rand Deeb , Simon Horman , Tony Nguyen , Sasha Levin Subject: [PATCH 5.15 09/76] net: ice: Fix potential NULL pointer dereference in ice_bridge_setlink() Date: Wed, 13 Mar 2024 12:41:16 -0400 Message-ID: <20240313164223.615640-10-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313164223.615640-1-sashal@kernel.org> References: <20240313164223.615640-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.152-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.15.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.15.152-rc1 X-KernelTest-Deadline: 2024-03-15T16:42+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Rand Deeb [ Upstream commit 06e456a05d669ca30b224b8ed962421770c1496c ] The function ice_bridge_setlink() may encounter a NULL pointer dereference if nlmsg_find_attr() returns NULL and br_spec is dereferenced subsequently in nla_for_each_nested(). To address this issue, add a check to ensure that br_spec is not NULL before proceeding with the nested attribute iteration. Fixes: b1edc14a3fbf ("ice: Implement ice_bridge_getlink and ice_bridge_setl= ink") Signed-off-by: Rand Deeb Reviewed-by: Simon Horman Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/ice/ice_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethern= et/intel/ice/ice_main.c index d4c29e2562a1c..3cc344d5228b6 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -6987,6 +6987,8 @@ ice_bridge_setlink(struct net_device *dev, struct nlm= sghdr *nlh, pf_sw =3D pf->first_sw; /* find the attribute in the netlink message */ br_spec =3D nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); + if (!br_spec) + return -EINVAL; =20 nla_for_each_nested(attr, br_spec, rem) { __u16 mode; --=20 2.43.0