From patchwork Sat Oct 31 11:35:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 317434 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C63F1C4742C for ; Sat, 31 Oct 2020 11:35:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84E8120791 for ; Sat, 31 Oct 2020 11:35:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604144140; bh=QHwXpG47XfDbtamJzkp8qGbSqk72OGM8Sm0HWrGPTW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DupkbOVKpWZcdiO5Dd0w8ZMhsHf3aXU+teJy3daGWS6TpXXU0P6mAAeVPVaNThrTF Z1A40q/JyxyPlaKEAV/ZT6uLJkaN/beLOgf6yfyDr4dOIPiMYMKQBTF8M5lQXW96Oe J3vEpf3LJDG/3G3jAG/djispuLIO0bbuO1V7f1Hs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727049AbgJaLfj (ORCPT ); Sat, 31 Oct 2020 07:35:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:33362 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727039AbgJaLfe (ORCPT ); Sat, 31 Oct 2020 07:35:34 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3DC9620739; Sat, 31 Oct 2020 11:35:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604144131; bh=QHwXpG47XfDbtamJzkp8qGbSqk72OGM8Sm0HWrGPTW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yaRxLYgLVHUN8jxiLSXXPn5fdnWO/3DZmO3PxO4egSQLQXEVGxUuiROOj222p2hbB awW9aW08oLjed7+FxKYUPlqIW6GG0x0BFm5dVz5cUoTRLv3EGzWjHodOeGQro8DxuR 1izCkaSvXNKntH1nB+C35oXqe4+zDXGs73Xi/ypE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lijun Pan , Jakub Kicinski Subject: [PATCH 5.4 17/49] ibmvnic: fix ibmvnic_set_mac Date: Sat, 31 Oct 2020 12:35:13 +0100 Message-Id: <20201031113456.279111953@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201031113455.439684970@linuxfoundation.org> References: <20201031113455.439684970@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Lijun Pan [ Upstream commit 8fc3672a8ad3e782bac80e979bc2a2c10960cbe9 ] Jakub Kicinski brought up a concern in ibmvnic_set_mac(). ibmvnic_set_mac() does this: ether_addr_copy(adapter->mac_addr, addr->sa_data); if (adapter->state != VNIC_PROBED) rc = __ibmvnic_set_mac(netdev, addr->sa_data); So if state == VNIC_PROBED, the user can assign an invalid address to adapter->mac_addr, and ibmvnic_set_mac() will still return 0. The fix is to validate ethernet address at the beginning of ibmvnic_set_mac(), and move the ether_addr_copy to the case of "adapter->state != VNIC_PROBED". Fixes: c26eba03e407 ("ibmvnic: Update reset infrastructure to support tunable parameters") Signed-off-by: Lijun Pan Link: https://lore.kernel.org/r/20201027220456.71450-1-ljp@linux.ibm.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/ibm/ibmvnic.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1735,9 +1735,13 @@ static int ibmvnic_set_mac(struct net_de int rc; rc = 0; - ether_addr_copy(adapter->mac_addr, addr->sa_data); - if (adapter->state != VNIC_PROBED) + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (adapter->state != VNIC_PROBED) { + ether_addr_copy(adapter->mac_addr, addr->sa_data); rc = __ibmvnic_set_mac(netdev, addr->sa_data); + } return rc; }