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=-9.8 required=3.0 tests=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 35C0FC32753 for ; Wed, 14 Aug 2019 17:27:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 01D78206C1 for ; Wed, 14 Aug 2019 17:27:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565803625; bh=dcNlIq3Uf0l0lx13G3Fyg5C2xZf/pldIfA1pAiWLhjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WXr/6H9nKYqVqG/HTnPX5rRKiU+yEaVXZawyF1lOWyWJPo/MgSuFtMDXCBmu+EoPB WI8/TvmipISWyb0+kztOp9qhsTrokBIMZlcF/K8Nel7ZLWROxE3vzycSlGzLE729Dm mXDTw2HzdTuDQ2T7ZygwOdqddcLD60aIKASEQlV0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729144AbfHNREL (ORCPT ); Wed, 14 Aug 2019 13:04:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:52952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729127AbfHNREJ (ORCPT ); Wed, 14 Aug 2019 13:04:09 -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 CAB2F208C2; Wed, 14 Aug 2019 17:04:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565802248; bh=dcNlIq3Uf0l0lx13G3Fyg5C2xZf/pldIfA1pAiWLhjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=laj6tMLrxxoX6/VMhNT+f3OowbXoXsGg0fBgMwkqrnceIhkeM2PEDa2BrCgJaR06w FqWfEZ3rrU4RkcSaXe6SkOwHG0N+UaUf9ZeprtzBvzNEb54s06It3maQUDlz9vxG8H NRuUpcpFDMT/jm6JdCZWS1AF1zeYMxRewjNEZYvo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Farhan Ali , Eric Farman , Cornelia Huck , Sasha Levin Subject: [PATCH 5.2 051/144] vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn Date: Wed, 14 Aug 2019 19:00:07 +0200 Message-Id: <20190814165801.962212682@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190814165759.466811854@linuxfoundation.org> References: <20190814165759.466811854@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 [ Upstream commit c1ab69268d124ebdbb3864580808188ccd3ea355 ] So we don't call try to call vfio_unpin_pages() incorrectly. Fixes: 0a19e61e6d4c ("vfio: ccw: introduce channel program interfaces") Signed-off-by: Farhan Ali Reviewed-by: Eric Farman Reviewed-by: Cornelia Huck Message-Id: <33a89467ad6369196ae6edf820cbcb1e2d8d050c.1562854091.git.alifm@linux.ibm.com> Signed-off-by: Cornelia Huck Signed-off-by: Sasha Levin --- drivers/s390/cio/vfio_ccw_cp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c index 0e79799e9a719..79eb40bdaf9f4 100644 --- a/drivers/s390/cio/vfio_ccw_cp.c +++ b/drivers/s390/cio/vfio_ccw_cp.c @@ -89,8 +89,10 @@ static int pfn_array_alloc_pin(struct pfn_array *pa, struct device *mdev, sizeof(*pa->pa_iova_pfn) + sizeof(*pa->pa_pfn), GFP_KERNEL); - if (unlikely(!pa->pa_iova_pfn)) + if (unlikely(!pa->pa_iova_pfn)) { + pa->pa_nr = 0; return -ENOMEM; + } pa->pa_pfn = pa->pa_iova_pfn + pa->pa_nr; pa->pa_iova_pfn[0] = pa->pa_iova >> PAGE_SHIFT; -- 2.20.1