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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 B7493C2BA83 for ; Fri, 14 Feb 2020 16:35:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 908C424696 for ; Fri, 14 Feb 2020 16:35:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581698115; bh=cfIgvVj7qHISRaX4GDxNbcsuJ+CNHbeT9hRhvwyQMEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CEwLkXNRCM1/NnE3mdeItoLmZdVEdCPtIPdS55fXKfd8Hz+DgUB1fcqZFemVqFXGr AmjEv8jLqpfsyav33nmhOFtYvOz8mpDmtdEKxG8/T8amTGdVic8BYidPjypR0MZvnG BqNU7lbHryy4vsxsLJfUjt7fP3qZzdKzWy2fYn2I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405982AbgBNQYs (ORCPT ); Fri, 14 Feb 2020 11:24:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:33652 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405974AbgBNQYr (ORCPT ); Fri, 14 Feb 2020 11:24:47 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 24568247AC; Fri, 14 Feb 2020 16:24:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581697486; bh=cfIgvVj7qHISRaX4GDxNbcsuJ+CNHbeT9hRhvwyQMEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cp0dqvMyeAGBYWfQF7n+JsG/wHk6h8xviWfacRQ8W3pqA4J5WmXoaHgfKJdgSpJe8 WVi3nuac6LSrHkYuHOUIGW2uNh8Ab7M7kRckw0DtEPp+y8dLy8LFgK3eopT0rvtTN1 4GLokVjQnL1EqCNuDtLj7NTZx+1Mp8TS19nE5Evw= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nicolai Stange , Kalle Valo , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 017/100] libertas: don't exit from lbs_ibss_join_existing() with RCU read lock held Date: Fri, 14 Feb 2020 11:23:01 -0500 Message-Id: <20200214162425.21071-17-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214162425.21071-1-sashal@kernel.org> References: <20200214162425.21071-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nicolai Stange [ Upstream commit c7bf1fb7ddca331780b9a733ae308737b39f1ad4 ] Commit e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss descriptor") introduced a bounds check on the number of supplied rates to lbs_ibss_join_existing(). Unfortunately, it introduced a return path from within a RCU read side critical section without a corresponding rcu_read_unlock(). Fix this. Fixes: e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss descriptor") Signed-off-by: Nicolai Stange Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/libertas/cfg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c index 0824697c3dca0..803684eed142c 100644 --- a/drivers/net/wireless/libertas/cfg.c +++ b/drivers/net/wireless/libertas/cfg.c @@ -1853,6 +1853,7 @@ static int lbs_ibss_join_existing(struct lbs_private *priv, rates_max = rates_eid[1]; if (rates_max > MAX_RATES) { lbs_deb_join("invalid rates"); + rcu_read_unlock(); goto out; } rates = cmd.bss.rates; -- 2.20.1