From patchwork Thu May 20 09:22:19 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: 444106 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 51329C433B4 for ; Thu, 20 May 2021 11:01:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38A4361186 for ; Thu, 20 May 2021 11:01:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239813AbhETLCe (ORCPT ); Thu, 20 May 2021 07:02:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:57500 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237692AbhETLAc (ORCPT ); Thu, 20 May 2021 07:00:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0F3E461D09; Thu, 20 May 2021 10:03:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505007; bh=3/ql1dbxwbS6CZC1q+MvDU85jnr4I8P/z1eQDhHQrC4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QFoTRS8QU364zqJQ+vJjcYcyOuVSE0Q++dpndqJMuLTtxqZSbQ75rPHP9BzVV2VEJ DLzhcenfilYGkUj5IoZL+LATkLTvvaILzvij5jYYfVk2nDsnWVcfTkBu0Dy0vxTUuQ HptyJstg0fRBANGzh7HoiyUIWXVsxfccIw+L+TZA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johannes Berg , Sasha Levin Subject: [PATCH 4.9 147/240] mac80211: bail out if cipher schemes are invalid Date: Thu, 20 May 2021 11:22:19 +0200 Message-Id: <20210520092113.591342911@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092108.587553970@linuxfoundation.org> References: <20210520092108.587553970@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 f31fd21d59ba..5f8c6f9563b0 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -1036,8 +1036,11 @@ 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)