From patchwork Mon Aug 3 12:19:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 266848 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 D51A3C433E3 for ; Mon, 3 Aug 2020 12:41:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B640D2054F for ; Mon, 3 Aug 2020 12:41:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596458497; bh=tRCAR+29801nJlV6nn6fx12W0QoTWA6SQQ+ift7Kwg0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=N8kNkUQQ4Xc3FaLdv+iw7vebU1OR6OnWpHtU8N+32MEPT/Ge7UrelKVO9vAmIPlET Mm3Qp0yLRCnU3EjmMOrzaAbIVFKcpimDUpxJP4KYtG4j7M4Tq/8D0+7gA3txW2nvQd csAXIVjvGDL7nQirSQHOQVIcDlo9EPjcnMthqIsM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729317AbgHCMc3 (ORCPT ); Mon, 3 Aug 2020 08:32:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:60416 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729312AbgHCMc2 (ORCPT ); Mon, 3 Aug 2020 08:32:28 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 B87112076B; Mon, 3 Aug 2020 12:32:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596457947; bh=tRCAR+29801nJlV6nn6fx12W0QoTWA6SQQ+ift7Kwg0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=z/kvzCSkRNpKs+xvUTUITFdHBtnwF8p2aa/jylpTxLhMIv6i9l8gtrh7nChByEk5a 8CU7I+S/xic20wQnzBvJiF/NsOViHG87AdDixyUHJMeQSnL0H4+rR2U7xeG0hWElbu hSkisPfQX0tXlz2sJ3Kja+NCqH1HlK6w+Goda1gg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Remi Pommarel , Johannes Berg , Sasha Levin Subject: [PATCH 4.19 40/56] mac80211: mesh: Free pending skb when destroying a mpath Date: Mon, 3 Aug 2020 14:19:55 +0200 Message-Id: <20200803121852.281619470@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200803121850.306734207@linuxfoundation.org> References: <20200803121850.306734207@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Remi Pommarel [ Upstream commit 5e43540c2af0a0c0a18e39579b1ad49541f87506 ] A mpath object can hold reference on a list of skb that are waiting for mpath resolution to be sent. When destroying a mpath this skb list should be cleaned up in order to not leak memory. Fixing that kind of leak: unreferenced object 0xffff0000181c9300 (size 1088): comm "openvpn", pid 1782, jiffies 4295071698 (age 80.416s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 f9 80 36 00 00 00 00 00 ..........6..... 02 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............ backtrace: [<000000004bc6a443>] kmem_cache_alloc+0x1a4/0x2f0 [<000000002caaef13>] sk_prot_alloc.isra.39+0x34/0x178 [<00000000ceeaa916>] sk_alloc+0x34/0x228 [<00000000ca1f1d04>] inet_create+0x198/0x518 [<0000000035626b1c>] __sock_create+0x134/0x328 [<00000000a12b3a87>] __sys_socket+0xb0/0x158 [<00000000ff859f23>] __arm64_sys_socket+0x40/0x58 [<00000000263486ec>] el0_svc_handler+0xd0/0x1a0 [<0000000005b5157d>] el0_svc+0x8/0xc unreferenced object 0xffff000012973a40 (size 216): comm "openvpn", pid 1782, jiffies 4295082137 (age 38.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 c0 06 16 00 00 ff ff 00 93 1c 18 00 00 ff ff ................ backtrace: [<000000004bc6a443>] kmem_cache_alloc+0x1a4/0x2f0 [<0000000023c8c8f9>] __alloc_skb+0xc0/0x2b8 [<000000007ad950bb>] alloc_skb_with_frags+0x60/0x320 [<00000000ef90023a>] sock_alloc_send_pskb+0x388/0x3c0 [<00000000104fb1a3>] sock_alloc_send_skb+0x1c/0x28 [<000000006919d2dd>] __ip_append_data+0xba4/0x11f0 [<0000000083477587>] ip_make_skb+0x14c/0x1a8 [<0000000024f3d592>] udp_sendmsg+0xaf0/0xcf0 [<000000005aabe255>] inet_sendmsg+0x5c/0x80 [<000000008651ea08>] __sys_sendto+0x15c/0x218 [<000000003505c99b>] __arm64_sys_sendto+0x74/0x90 [<00000000263486ec>] el0_svc_handler+0xd0/0x1a0 [<0000000005b5157d>] el0_svc+0x8/0xc Fixes: 2bdaf386f99c (mac80211: mesh: move path tables into if_mesh) Signed-off-by: Remi Pommarel Link: https://lore.kernel.org/r/20200704135419.27703-1-repk@triplefau.lt Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/mesh_pathtbl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index ac1f5db529945..4fc720c77e37e 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -532,6 +532,7 @@ static void mesh_path_free_rcu(struct mesh_table *tbl, del_timer_sync(&mpath->timer); atomic_dec(&sdata->u.mesh.mpaths); atomic_dec(&tbl->entries); + mesh_path_flush_pending(mpath); kfree_rcu(mpath, rcu); }