Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964774AbbLGQNW (ORCPT ); Mon, 7 Dec 2015 11:13:22 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:58942 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932889AbbLGO5n (ORCPT ); Mon, 7 Dec 2015 09:57:43 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nikolay Aleksandrov , Jay Vosburgh , "David S. Miller" Subject: [PATCH 4.2 028/124] bonding: fix panic on non-ARPHRD_ETHER enslave failure Date: Mon, 7 Dec 2015 09:55:18 -0500 Message-Id: <20151207144921.038872710@linuxfoundation.org> X-Mailer: git-send-email 2.6.3 In-Reply-To: <20151207144919.656035367@linuxfoundation.org> References: <20151207144919.656035367@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1989 Lines: 50 4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jay Vosburgh [ Upstream commit 40baec225765c54eefa870530dd613bad9829bb7 ] Since commit 7d5cd2ce529b, when bond_enslave fails on devices that are not ARPHRD_ETHER, if needed, it resets the bonding device back to ARPHRD_ETHER by calling ether_setup. Unfortunately, ether_setup clobbers dev->flags, clearing IFF_UP if the bond device is up, leaving it in a quasi-down state without having actually gone through dev_close. For bonding, if any periodic work queue items are active (miimon, arp_interval, etc), those will remain running, as they are stopped by bond_close. At this point, if the bonding module is unloaded or the bond is deleted, the system will panic when the work function is called. This panic is resolved by calling dev_close on the bond itself prior to calling ether_setup. Cc: Nikolay Aleksandrov Signed-off-by: Jay Vosburgh Fixes: 7d5cd2ce5292 ("bonding: correctly handle bonding type change on enslave failure") Acked-by: Nikolay Aleksandrov Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/bonding/bond_main.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1751,6 +1751,7 @@ err_undo_flags: slave_dev->dev_addr)) eth_hw_addr_random(bond_dev); if (bond_dev->type != ARPHRD_ETHER) { + dev_close(bond_dev); ether_setup(bond_dev); bond_dev->flags |= IFF_MASTER; bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/