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x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966009AbeCSRfw (ORCPT ); Mon, 19 Mar 2018 13:35:52 -0400 Received: from mail-by2nam03on0122.outbound.protection.outlook.com ([104.47.42.122]:28800 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966026AbeCSQGr (ORCPT ); Mon, 19 Mar 2018 12:06:47 -0400 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Luca Coelho , Johannes Berg , Sasha Levin Subject: [PATCH AUTOSEL for 4.4 008/167] mac80211: bail out from prep_connection() if a reconfig is ongoing Thread-Topic: [PATCH AUTOSEL for 4.4 008/167] mac80211: bail out from prep_connection() if a reconfig is ongoing Thread-Index: AQHTv5wa5e0irY9KvUqzQ0nSdVKJHw== Date: Mon, 19 Mar 2018 16:05:29 +0000 Message-ID: <20180319160513.16384-8-alexander.levin@microsoft.com> References: <20180319160513.16384-1-alexander.levin@microsoft.com> In-Reply-To: <20180319160513.16384-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0920;7:6Wyv5Tqbkhdwn8vRXvjJVpiaYjEcSbMcSoPC7FdmSplrDT5N0Z+9G8eJTvlHIfOb0mlpT4uawMJIqeqXD+x84XTOS5dfGsD1mNNICv/b1hJh2nf9mBX6EAP+N/g0+hptxGSIOJuvjZgN+LS7W/jljsGA61na6hu0ABvP5N0I2wReZU6xsd0GN2Czve7pIzbqBHWXN8UduLJfv5blS+kxvNB7qWWPssXNNV27MOUYHu8vb35mz2fts3bWFYDMZn/F;20:s57YktQ0RB0BQuSkvbGlTcv6ybJwj9BEDjp4eGVf9f/2WUUxCGCYuhdqvDk0P+ZjQVquK992CaZ0WUDm0zayjCH2TYYEGcZE89IdkF19NAyw1xzPl7ZwkJkE3b4awj3p/tbwD4DjR93njdaUG89xM1iP+VSK4m0oEcU7T8DGX4g= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 49352736-b728-4f63-1612-08d58db3684b x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0920; 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x-microsoft-antispam-message-info: /BbVsFyRY7FRnYh9dzYk3pdCU6NSPH501zCxKhVg4o3So/HQNn1EGJEGqBuSwCNLXgDJ5U160mDJqkzZKtdL1e3BqYrulSbNUC6azayIXpgUb3MIG44n/zPbv8p9xD3Q3TMw7NFKUTGMCgZRwcYQirRfi2as5JulEckCY9IcwbH68AmuAiYnODWGJXM6s63uho1kTIX4dASdRwcdccGDWzMzEggzValBEFGeteFMMgqgnZOw4YoeGdomt43RN379U8UqWCMHI4jhD7UDQVeKtFFYZJYBjowiDrCrAnlzKfDbMORanynRuyWsaq9TkEA65S6BvRUxrB482i4YAYu4/w== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 49352736-b728-4f63-1612-08d58db3684b X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 16:05:29.9628 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0920 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Luca Coelho [ Upstream commit f8860ce836f2d502b07ef99559707fe55d90f5bc ] If ieee80211_hw_restart() is called during authentication, the authentication process will continue, causing the driver to be called in a wrong state. This ultimately causes an oops in the iwlwifi driver (at least). This fixes bugzilla 195299 partly. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=3D195299 Signed-off-by: Luca Coelho Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/mlme.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 23095d5e0199..005cd8796505 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -4326,6 +4326,10 @@ static int ieee80211_prep_connection(struct ieee8021= 1_sub_if_data *sdata, if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) return -EINVAL; =20 + /* If a reconfig is happening, bail out */ + if (local->in_reconfig) + return -EBUSY; + if (assoc) { rcu_read_lock(); have_sta =3D sta_info_get(sdata, cbss->bssid); --=20 2.14.1