From patchwork Tue Oct 27 13:48:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 306867 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 5C8A1C388F9 for ; Tue, 27 Oct 2020 18:27:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F448206E5 for ; Tue, 27 Oct 2020 18:27:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603823230; bh=CWOsMEaANEf7qNSYdqqZULq7S6mlURdugVZpMugxmZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kpxQVZ2gEyXavn5UhP1Fvbe8CfOnjlVdYEKIxzEK5R5j73IqGWCZfx4O62skZcZZJ o8Mx9AfObsZjoJBq2jks7v5cwJLSUa9RyAKe5dUoJAmKBLy54CuzX2yqhmwpC2k6nM rDJoG8Vypbm2tTgn0+fM9kbAXuqaH8xp84mZOGuA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753085AbgJ0N62 (ORCPT ); Tue, 27 Oct 2020 09:58:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:45708 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753076AbgJ0N60 (ORCPT ); Tue, 27 Oct 2020 09:58:26 -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 1FBD2206D4; Tue, 27 Oct 2020 13:58:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807105; bh=CWOsMEaANEf7qNSYdqqZULq7S6mlURdugVZpMugxmZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IfY2EI3GB0TUeC5P7wjwEczX4+hMZhkN27wSfd6rATUCConNEukg4kL3W5NQxizrl xH3C6DLNISgoxVYFM4OJfvg/bs6rkgsV/mSw6zEdc+u4L3p7zUZC60wqwiNkMEnlI9 p4K1i9A55RRFTPTN01mwguncfj8+qSjH94u0zsPk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Kalle Valo , Sasha Levin Subject: [PATCH 4.4 027/112] ath6kl: prevent potential array overflow in ath6kl_add_new_sta() Date: Tue, 27 Oct 2020 14:48:57 +0100 Message-Id: <20201027134901.846181625@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134900.532249571@linuxfoundation.org> References: <20201027134900.532249571@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit 54f9ab7b870934b70e5a21786d951fbcf663970f ] The value for "aid" comes from skb->data so Smatch marks it as untrusted. If it's invalid then it can result in an out of bounds array access in ath6kl_add_new_sta(). Fixes: 572e27c00c9d ("ath6kl: Fix AP mode connect event parsing and TIM updates") Signed-off-by: Dan Carpenter Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200813141315.GB457408@mwanda Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath6kl/main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/main.c b/drivers/net/wireless/ath/ath6kl/main.c index 1af3fed5a72ca..1a68518279689 100644 --- a/drivers/net/wireless/ath/ath6kl/main.c +++ b/drivers/net/wireless/ath/ath6kl/main.c @@ -430,6 +430,9 @@ void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr, ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid); + if (aid < 1 || aid > AP_MAX_NUM_STA) + return; + if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) assoc_info;