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 B7425C3A5A8 for ; Wed, 4 Sep 2019 18:14:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 838EE22DBF for ; Wed, 4 Sep 2019 18:14:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620850; bh=AijjDcw+bDNa2gdFvNVN9OG3Ed0uGHSfKxuUEJK5c9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Iz0yIQEI3Vnm5d0ozpTyaTj6b7FgXDF1IZmzjWl+I2lIAc5F5UHfIKi3rW0MmCu1T ep/7Y/3LosaCtXcAKZgXDweOCIFwcq1IjhZEmjCFJKAmwvAef2VitZQlqP5rGCEjpI BeUJIcpUOTC6urnOZqfeV7YJw7C97WcR0ES1brdY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390737AbfIDSOJ (ORCPT ); Wed, 4 Sep 2019 14:14:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:59174 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390193AbfIDSOH (ORCPT ); Wed, 4 Sep 2019 14:14:07 -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 1C49E206BA; Wed, 4 Sep 2019 18:14:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620846; bh=AijjDcw+bDNa2gdFvNVN9OG3Ed0uGHSfKxuUEJK5c9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vZH+OapStm/CKo2eQrYaS56zs1nQU2fIrRVqsxNwuXuvk1tqorVuhTNT+7l4mVNFO LCfVA7DPRVQxFfu2La8yuu/mbZUhkcr3oQ0gSwUn6f+6XywaxrZLCZQ46OOyHIszaj YtoB0lpsoXwtdmz5AlEMPzKdL3+kYMr0mSzL9UGE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Gary R Hook , Herbert Xu Subject: [PATCH 5.2 118/143] crypto: ccp - Ignore unconfigured CCP device on suspend/resume Date: Wed, 4 Sep 2019 19:54:21 +0200 Message-Id: <20190904175319.015719586@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190904175314.206239922@linuxfoundation.org> References: <20190904175314.206239922@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: Gary R Hook commit 5871cd93692c8071fb9358daccb715b5081316ac upstream. If a CCP is unconfigured (e.g. there are no available queues) then there will be no data structures allocated for the device. Thus, we must check for validity of a pointer before trying to access structure members. Fixes: 720419f01832f ("crypto: ccp - Introduce the AMD Secure Processor device") Cc: Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/ccp/ccp-dev.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -540,6 +540,10 @@ int ccp_dev_suspend(struct sp_device *sp unsigned long flags; unsigned int i; + /* If there's no device there's nothing to do */ + if (!ccp) + return 0; + spin_lock_irqsave(&ccp->cmd_lock, flags); ccp->suspending = 1; @@ -564,6 +568,10 @@ int ccp_dev_resume(struct sp_device *sp) unsigned long flags; unsigned int i; + /* If there's no device there's nothing to do */ + if (!ccp) + return 0; + spin_lock_irqsave(&ccp->cmd_lock, flags); ccp->suspending = 0;