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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 1AEBEC2F3BE for ; Mon, 21 Jan 2019 14:10:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA10320861 for ; Mon, 21 Jan 2019 14:10:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548079830; bh=W0jUWP8stA44jKMDWvMUqc3SmOv3crdsTcUx1fopP8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uAfzS61CD+hZJ0g+buhZ8haqCXq04+plQLi/3KMH/ZNXO5naIRPP34hZFNhb6qeL/ aI1WbXTx14AoIkLC6OUa9oNndzS7E9Rk1+9/yXo3L3/w8y+F2QOw1y50w+COyUL3Xh Nd5ZnvjGDD9mqqfSeZ4Dh759rbfMm+XiB8By0vw0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731843AbfAUOK2 (ORCPT ); Mon, 21 Jan 2019 09:10:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:38872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731537AbfAUNyh (ORCPT ); Mon, 21 Jan 2019 08:54:37 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (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 8D7A020861; Mon, 21 Jan 2019 13:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548078877; bh=W0jUWP8stA44jKMDWvMUqc3SmOv3crdsTcUx1fopP8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pj/JWXa1D5Jnq4nDDSjXVXe7S6Wqx6Kc44MsAgAlif6OwfxXPT9Ud+4dIl3pIzflP 4ycJzbB1t8ho2pmudW+k/tt7iRmFDqnagsNScaI3FHkaa1tv9nx4NRehZE2sJi6vww DuQvufQbGZPLGM1acZEwk/eiApxnJyxD8zoreA4o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Leon Romanovsky , Jason Gunthorpe , Willem de Bruijn , "David S. Miller" Subject: [PATCH 4.9 15/51] packet: Do not leak dev refcounts on error exit Date: Mon, 21 Jan 2019 14:44:11 +0100 Message-Id: <20190121122454.916353666@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190121122453.700446926@linuxfoundation.org> References: <20190121122453.700446926@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jason Gunthorpe [ Upstream commit d972f3dce8d161e2142da0ab1ef25df00e2f21a9 ] 'dev' is non NULL when the addr_len check triggers so it must goto a label that does the dev_put otherwise dev will have a leaked refcount. This bug causes the ib_ipoib module to become unloadable when using systemd-network as it triggers this check on InfiniBand links. Fixes: 99137b7888f4 ("packet: validate address length") Reported-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Acked-by: Willem de Bruijn Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/packet/af_packet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2663,7 +2663,7 @@ static int tpacket_snd(struct packet_soc addr = saddr->sll_halen ? saddr->sll_addr : NULL; dev = dev_get_by_index(sock_net(&po->sk), saddr->sll_ifindex); if (addr && dev && saddr->sll_halen < dev->addr_len) - goto out; + goto out_put; } err = -ENXIO; @@ -2862,7 +2862,7 @@ static int packet_snd(struct socket *soc addr = saddr->sll_halen ? saddr->sll_addr : NULL; dev = dev_get_by_index(sock_net(sk), saddr->sll_ifindex); if (addr && dev && saddr->sll_halen < dev->addr_len) - goto out; + goto out_unlock; } err = -ENXIO;