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,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 35DD9C2BB1D for ; Tue, 17 Mar 2020 11:00:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0EC6620714 for ; Tue, 17 Mar 2020 11:00:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584442800; bh=Py3dPnos9L4ZGzR7x/NNU1dN+JqJ2GhNExW76DDVTWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HAtq+a/zlL10h3HwN2dTKhI/dK9h5dJRQgEUy0oCmO0z5gO+e9dxWkJv8tdN1n4LT MbUoTSyS6wv8NwwBITbSr6lG0Oao+XiNbJiXeepcC0IrqWKwtBgrwdFHO7aLwdBfg7 J7ucBBZ/Qp91143/IJkalQ0fGb0Jw/lH/39VX4fc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726157AbgCQK77 (ORCPT ); Tue, 17 Mar 2020 06:59:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:38720 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726599AbgCQK76 (ORCPT ); Tue, 17 Mar 2020 06:59:58 -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 01AFD20714; Tue, 17 Mar 2020 10:59:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584442798; bh=Py3dPnos9L4ZGzR7x/NNU1dN+JqJ2GhNExW76DDVTWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fGR2lcLY4vbsSjoVqQ8tuXnf5CWN0hQhdQi/jAv7lkZ84zsFGQgKdu8zjngUPBoh/ dAj8UN0npRCVXUibZnl/0wKP4DD8hZ+KLov2Fse4RczMcb5j7E0aMEjtnUwij6BVVT ktHfAS2WPPLT5NKI2I60pZYSgN1NqcGMt71+lfMk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+84484ccebdd4e5451d91@syzkaller.appspotmail.com, Karsten Graul , "David S. Miller" Subject: [PATCH 4.19 86/89] net/smc: check for valid ib_client_data Date: Tue, 17 Mar 2020 11:55:35 +0100 Message-Id: <20200317103309.966442397@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200317103259.744774526@linuxfoundation.org> References: <20200317103259.744774526@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Karsten Graul commit a2f2ef4a54c0d97aa6a8386f4ff23f36ebb488cf upstream. In smc_ib_remove_dev() check if the provided ib device was actually initialized for SMC before. Reported-by: syzbot+84484ccebdd4e5451d91@syzkaller.appspotmail.com Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client") Signed-off-by: Karsten Graul Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/smc/smc_ib.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -552,6 +552,8 @@ static void smc_ib_remove_dev(struct ib_ struct smc_ib_device *smcibdev; smcibdev = ib_get_client_data(ibdev, &smc_ib_client); + if (!smcibdev || smcibdev->ibdev != ibdev) + return; ib_set_client_data(ibdev, &smc_ib_client, NULL); spin_lock(&smc_ib_devices.lock); list_del_init(&smcibdev->list); /* remove from smc_ib_devices */