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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1AB59C433FF for ; Mon, 29 Jul 2019 19:33:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DC8982070B for ; Mon, 29 Jul 2019 19:33:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564428824; bh=6E5EdRJFvwwKHTg6u4GGDRI6rGEUkE2S1UcB+Lhht64=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XdhZgLQwrdiqRn4DgPHMbB+q7Anp9Wdmu8EyolIo7Dz6MZ6q6MeWa9PXllfMfJ9mo KlDr/SVmOXmm0Eh1xGy/99dh1RpImz5FbnporWCIlVqTeqf4OFAgbJC1zutjelzo8o cCmg/pozk4xpeifeXHhuYYr/e0DH24X7qHC/WaE0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729646AbfG2Tdn (ORCPT ); Mon, 29 Jul 2019 15:33:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:47830 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387604AbfG2Tdg (ORCPT ); Mon, 29 Jul 2019 15:33:36 -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 E66F621773; Mon, 29 Jul 2019 19:33:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564428816; bh=6E5EdRJFvwwKHTg6u4GGDRI6rGEUkE2S1UcB+Lhht64=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pZbVSYS1j499uu8rlH9GyT2u1k7uh5AQKpAWQ2cyfOI5GaErvWi44frzaB+KY92lz dvMYUrj+w4QGQ5K38t3IFK9fTsfGgpc0MhI4QJgVF0GJCA6OvHR9hCoaPF6F4Zc3a4 5sjnZXJNY1SAA98eM8l5CMmgOXb8RUxpzb1zo4Nc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+d6636a36d3c34bd88938@syzkaller.appspotmail.com, Cong Wang , "David S. Miller" Subject: [PATCH 4.14 196/293] netrom: fix a memory leak in nr_rx_frame() Date: Mon, 29 Jul 2019 21:21:27 +0200 Message-Id: <20190729190839.483361877@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190820.321094988@linuxfoundation.org> References: <20190729190820.321094988@linuxfoundation.org> User-Agent: quilt/0.66 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 From: Cong Wang [ Upstream commit c8c8218ec5af5d2598381883acbefbf604e56b5e ] When the skb is associated with a new sock, just assigning it to skb->sk is not sufficient, we have to set its destructor to free the sock properly too. Reported-by: syzbot+d6636a36d3c34bd88938@syzkaller.appspotmail.com Signed-off-by: Cong Wang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/netrom/af_netrom.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -871,7 +871,7 @@ int nr_rx_frame(struct sk_buff *skb, str unsigned short frametype, flags, window, timeout; int ret; - skb->sk = NULL; /* Initially we don't know who it's for */ + skb_orphan(skb); /* * skb->data points to the netrom frame start @@ -970,6 +970,7 @@ int nr_rx_frame(struct sk_buff *skb, str window = skb->data[20]; skb->sk = make; + skb->destructor = sock_efree; make->sk_state = TCP_ESTABLISHED; /* Fill in his circuit details */