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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CB85C433EF for ; Wed, 18 May 2022 12:32:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236817AbiERMcC (ORCPT ); Wed, 18 May 2022 08:32:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236948AbiERM3w (ORCPT ); Wed, 18 May 2022 08:29:52 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8DB9D19668F; Wed, 18 May 2022 05:28:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D936B6168C; Wed, 18 May 2022 12:28:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 272BBC36AEC; Wed, 18 May 2022 12:28:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652876897; bh=k+ohMeJjp2tFo/hvSvVUArrdssbnYwApznZxYrJaEVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TqqcHjOOYg92O/2IgN/NOwN8niBMZFERxwevQbXrsLoL3cOkZkCpRp4dnxWQloDLl G9IagM6KPzyeBN/ghXk8iJpOO3cRLndvyUZJDxtdRYq1SoDjY0TH9LdHWWf0rcZd1Y 0I3VlIp58noyp9EfL20AQPVhn9kXdl+kHC7DTdT50G99JN/iHuYwNS2XxPbAMy/314 oXK4K1d8yvwIlGTHinjJ9lbdU61eaF3mVle3zwFx0ePHAdbJBUdUcTLZEXpif8jvzp HvWB43dHC/XYHouWvYSx9hMIkj7TxskrmKLDQoHqOZWgawxIE3qREmfiLoSkrQbcDh D8nMYJL/r7yJg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Johannes Berg , Sasha Levin , johannes@sipsolutions.net, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 09/17] nl80211: fix locking in nl80211_set_tx_bitrate_mask() Date: Wed, 18 May 2022 08:27:43 -0400 Message-Id: <20220518122753.342758-9-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220518122753.342758-1-sashal@kernel.org> References: <20220518122753.342758-1-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: linux-kernel@vger.kernel.org From: Johannes Berg [ Upstream commit f971e1887fdb3ab500c9bebf4b98f62d49a20655 ] This accesses the wdev's chandef etc., so cannot safely be used without holding the lock. Signed-off-by: Johannes Berg Link: https://lore.kernel.org/r/20220506102136.06b7205419e6.I2a87c05fbd8bc5e565e84d190d4cfd2e92695a90@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/nl80211.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 9fae09e860e1..7c65ad17bf50 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -11341,18 +11341,23 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, struct cfg80211_bitrate_mask mask; struct cfg80211_registered_device *rdev = info->user_ptr[0]; struct net_device *dev = info->user_ptr[1]; + struct wireless_dev *wdev = dev->ieee80211_ptr; int err; if (!rdev->ops->set_bitrate_mask) return -EOPNOTSUPP; + wdev_lock(wdev); err = nl80211_parse_tx_bitrate_mask(info, info->attrs, NL80211_ATTR_TX_RATES, &mask, dev, true); if (err) - return err; + goto out; - return rdev_set_bitrate_mask(rdev, dev, NULL, &mask); + err = rdev_set_bitrate_mask(rdev, dev, NULL, &mask); +out: + wdev_unlock(wdev); + return err; } static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info) -- 2.35.1