From patchwork Tue Jul 13 05:40:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongliang Mu X-Patchwork-Id: 475115 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 39F34C07E95 for ; Tue, 13 Jul 2021 05:40:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 705A6611F1 for ; Tue, 13 Jul 2021 05:40:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231971AbhGMFn0 (ORCPT ); Tue, 13 Jul 2021 01:43:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231261AbhGMFnY (ORCPT ); Tue, 13 Jul 2021 01:43:24 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A22D8C0613DD; Mon, 12 Jul 2021 22:40:34 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id h4so20626699pgp.5; Mon, 12 Jul 2021 22:40:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nCoykUfAeCmm7EweIlj2EVckVQsnC0tULaDKLSufM14=; b=IQcarGJNgxbM+9PEbA2hjgnAzguOJ6Fl8BtlwbD+QiGIWR2QMTzdNYqfV8/O5RePMu jc+dxLQtSRSvJd5BvPgOvvLJ5OeW0woWRuZQVOXF5jGWBxWJsiXTQcKd+XRV+mHg8sqx +w4nFQh3mtoYFNWwMqwL8aDxwxO4NBFoHE6iVr0d9Lwm7Ec2Q2hRYnlojrMdxLu9ICzW s8ZMU++QeEBFGBOF2ZFYYlhO8fjIHEh3A8gHxCjvIPXDq2/yN6wwBKOfr/SJGk4gR6Uy p38QX2Gm7WcgYXi5HiI76B0oFzTiPA+hGlMBBmhSccKY5AEKuaI5ZTtidS9bx/RVvo9U BW/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nCoykUfAeCmm7EweIlj2EVckVQsnC0tULaDKLSufM14=; b=Cw03a2WLrpqM6m+bEDPC1IFezzTr1a7sc4RthRIIqxB1G2RRmhuSBjKTKtdrRXIoza zxQCuED1luUn4oeEGHAbGEc62/ZjkbL8VQ1SykEfpdn3NmL1BAx0/IJtfaFKLZ85QPBQ ULwDO6lCgK7FFY0mlURc+mO7i7ywSC5XWd7/RzC44DWTUM8JQN8JTKRWBDcMrLe/1lp3 DTRII50GK6x2lbHDAOPk6j07CViCIMnfEtst5c2q4SFnJtCt1wHKkPL6sAf/lhVJpQTN FpIFBpXIVbhAfDH9Mc9U3oPXKmbc2ivZ8g2g9z1xqBysY12ealUlA3neDqAqP3Ie04k/ 6GeA== X-Gm-Message-State: AOAM530cjOuxCeajUDdNiehurLAum6K2PoOALOlBCelU2p4gcHZ0y3Xb XMJ2cQw8KRYh49qs9dsZkS4= X-Google-Smtp-Source: ABdhPJwavFVmwmu61Q4RhV1CUjL6kBCllpAgmQF59n/2dp1wTEUND5wCoYi7BpbOIEhOSkWuQCDw9w== X-Received: by 2002:a62:cd47:0:b029:329:714e:cce2 with SMTP id o68-20020a62cd470000b0290329714ecce2mr2925551pfg.22.1626154834013; Mon, 12 Jul 2021 22:40:34 -0700 (PDT) Received: from localhost.localdomain ([154.16.166.164]) by smtp.gmail.com with ESMTPSA id q14sm9232593pff.209.2021.07.12.22.40.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jul 2021 22:40:33 -0700 (PDT) From: Dongliang Mu To: Alexander Aring , Stefan Schmidt , "David S. Miller" , Jakub Kicinski Cc: Dongliang Mu , Alexander Aring , linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] ieee802154: hwsim: fix memory leak in __pskb_copy_fclone Date: Tue, 13 Jul 2021 13:40:18 +0800 Message-Id: <20210713054019.409273-1-mudongliangabcd@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org hwsim_hw_xmit fails to deallocate the newskb copied by pskb_copy. Fix this by adding kfree_skb after ieee802154_rx_irqsafe. [] __alloc_skb+0x22b/0x250 net/core/skbuff.c:414 [] __pskb_copy_fclone+0x75/0x360 net/core/skbuff.c:1609 [] __pskb_copy include/linux/skbuff.h:1176 [inline] [] pskb_copy include/linux/skbuff.h:3207 [inline] [] hwsim_hw_xmit+0xd3/0x140 drivers/net/ieee802154/mac802154_hwsim.c:132 [] drv_xmit_async net/mac802154/driver-ops.h:16 [inline] [] ieee802154_tx+0xc7/0x190 net/mac802154/tx.c:83 [] ieee802154_subif_start_xmit+0x58/0x70 net/mac802154/tx.c:132 [] __netdev_start_xmit include/linux/netdevice.h:4944 [inline] [] netdev_start_xmit include/linux/netdevice.h:4958 [inline] [] xmit_one net/core/dev.c:3658 [inline] [] dev_hard_start_xmit+0xe2/0x330 net/core/dev.c:3674 [] sch_direct_xmit+0xf8/0x520 net/sched/sch_generic.c:342 [] __dev_xmit_skb net/core/dev.c:3874 [inline] [] __dev_queue_xmit+0xa3b/0x1360 net/core/dev.c:4241 [] dgram_sendmsg+0x437/0x570 net/ieee802154/socket.c:682 [] sock_sendmsg_nosec net/socket.c:702 [inline] [] sock_sendmsg+0x56/0x80 net/socket.c:722 Fixes: f25da51fdc38 ("ieee802154: hwsim: add replacement for fakelb") Signed-off-by: Dongliang Mu --- drivers/net/ieee802154/mac802154_hwsim.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c index ebc976b7fcc2..d97ed033ac77 100644 --- a/drivers/net/ieee802154/mac802154_hwsim.c +++ b/drivers/net/ieee802154/mac802154_hwsim.c @@ -132,9 +132,11 @@ static int hwsim_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC); einfo = rcu_dereference(e->info); - if (newskb) + if (newskb) { ieee802154_rx_irqsafe(e->endpoint->hw, newskb, einfo->lqi); + kfree_skb(newskb); + } } } rcu_read_unlock();