From patchwork Thu May 20 09:21:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 445502 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 E98C8C433B4 for ; Thu, 20 May 2021 10:36:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C1C88613BD for ; Thu, 20 May 2021 10:36:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237069AbhETKhp (ORCPT ); Thu, 20 May 2021 06:37:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:39828 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237815AbhETKfi (ORCPT ); Thu, 20 May 2021 06:35:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 96C9161C60; Thu, 20 May 2021 09:53:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504429; bh=d0XyCZajFhdsawT98emn2xj0whUeV6aPMjizOV0UV/U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o2wgtft7Rcno7+02btOJuuWwFKICG30zwy2D9dMkz1J4qyAbRxBtD3+mvYOi2TyQF StSmj/24Ych20vX9SLYgv5xE+FI6ouPU6dbmHGYL7E+HcuZSEZHOd7XkDB6pS+ao3+ V3PZojDlWoW15hRUCt3TLJFac2sD+LSicAPHpF2Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johannes Berg , Sasha Levin Subject: [PATCH 4.14 207/323] mac80211: bail out if cipher schemes are invalid Date: Thu, 20 May 2021 11:21:39 +0200 Message-Id: <20210520092127.220041893@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johannes Berg [ Upstream commit db878e27a98106a70315d264cc92230d84009e72 ] If any of the cipher schemes specified by the driver are invalid, bail out and fail the registration rather than just warning. Otherwise, we might later crash when we try to use the invalid cipher scheme, e.g. if the hdr_len is (significantly) less than the pn_offs + pn_len, we'd have an out-of-bounds access in RX validation. Fixes: 2475b1cc0d52 ("mac80211: add generic cipher scheme support") Link: https://lore.kernel.org/r/20210408143149.38a3a13a1b19.I6b7f5790fa0958ed8049cf02ac2a535c61e9bc96@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/main.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 2136ce3b4489..a24acd0ee788 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -1043,8 +1043,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (local->hw.wiphy->max_scan_ie_len) local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; - WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, - local->hw.n_cipher_schemes)); + if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, + local->hw.n_cipher_schemes))) { + result = -EINVAL; + goto fail_workqueue; + } result = ieee80211_init_cipher_suites(local); if (result < 0)