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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 84CA3C4743C for ; Mon, 21 Jun 2021 18:05:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 709546100B for ; Mon, 21 Jun 2021 18:05:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234086AbhFUSHX (ORCPT ); Mon, 21 Jun 2021 14:07:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:46242 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234030AbhFUSEb (ORCPT ); Mon, 21 Jun 2021 14:04:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1199061353; Mon, 21 Jun 2021 17:56:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624298163; bh=k5qbGDjrmYPjqZwRGbFcF5nge5fMT5E8R3/0InNUKos=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pcsz0YcYKCKmTJo3CBUlk3Q4D92uEsnbhC2hIcQ3Vh6mH4/NTQUJMGOLIvVB7WpWg OhZQ8Bbr+uDsgl40XJN8YoB9xpOXNtMV3vyNJ2/awPHffKdZNKlxCK9962yigKJVv7 mTeGp6jS1OUeqmmbuBRonAadYqYVaPN58cdWfIBlztVBAAseju7RSXVPoHio8XsPGi qv+PMo0NL4xotWEAJ0GD2BArzdfHIyg26umJIZsT5rGeYnZ2nVGDUeMUXhafnUpLcS 61k9FwcBU1k7CywOqZ6sdicc9mQWuSsstCLJfRxVjtSuQxrcTQdh/ATcrqUlepwM1y 8Jb30YOHgrY9w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kees Cook , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 12/13] net: qed: Fix memcpy() overflow of qed_dcbx_params() Date: Mon, 21 Jun 2021 13:55:42 -0400 Message-Id: <20210621175544.736421-12-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210621175544.736421-1-sashal@kernel.org> References: <20210621175544.736421-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Kees Cook [ Upstream commit 1c200f832e14420fa770193f9871f4ce2df00d07 ] The source (&dcbx_info->operational.params) and dest (&p_hwfn->p_dcbx_info->set.config.params) are both struct qed_dcbx_params (560 bytes), not struct qed_dcbx_admin_params (564 bytes), which is used as the memcpy() size. However it seems that struct qed_dcbx_operational_params (dcbx_info->operational)'s layout matches struct qed_dcbx_admin_params (p_hwfn->p_dcbx_info->set.config)'s 4 byte difference (3 padding, 1 byte for "valid"). On the assumption that the size is wrong (rather than the source structure type), adjust the memcpy() size argument to be 4 bytes smaller and add a BUILD_BUG_ON() to validate any changes to the structure sizes. Signed-off-by: Kees Cook Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qed/qed_dcbx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c index 7b6824e560d2..59e59878a3a7 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c +++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c @@ -1205,9 +1205,11 @@ int qed_dcbx_get_config_params(struct qed_hwfn *p_hwfn, p_hwfn->p_dcbx_info->set.ver_num |= DCBX_CONFIG_VERSION_IEEE; p_hwfn->p_dcbx_info->set.enabled = dcbx_info->operational.enabled; + BUILD_BUG_ON(sizeof(dcbx_info->operational.params) != + sizeof(p_hwfn->p_dcbx_info->set.config.params)); memcpy(&p_hwfn->p_dcbx_info->set.config.params, &dcbx_info->operational.params, - sizeof(struct qed_dcbx_admin_params)); + sizeof(p_hwfn->p_dcbx_info->set.config.params)); p_hwfn->p_dcbx_info->set.config.valid = true; memcpy(params, &p_hwfn->p_dcbx_info->set, sizeof(struct qed_dcbx_set)); -- 2.30.2