From patchwork Thu Oct 4 13:37:24 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 189152 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id B63372C03A8 for ; Thu, 4 Oct 2012 23:38:15 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933036Ab2JDNhx (ORCPT ); Thu, 4 Oct 2012 09:37:53 -0400 Received: from cantor2.suse.de ([195.135.220.15]:37408 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933054Ab2JDNhp (ORCPT ); Thu, 4 Oct 2012 09:37:45 -0400 Received: from relay2.suse.de (unknown [195.135.220.254]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 4595AA3ABA; Thu, 4 Oct 2012 15:37:44 +0200 (CEST) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: Julia Lawall Subject: [PATCH 56/56] arch/powerpc/kvm/e500_tlb.c: fix error return code Date: Thu, 4 Oct 2012 15:37:24 +0200 Message-Id: <1349357844-11288-57-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1349357844-11288-1-git-send-email-agraf@suse.de> References: <1349357844-11288-1-git-send-email-agraf@suse.de> Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org From: Julia Lawall Convert a 0 error return code to a negative one, as returned elsewhere in the function. A new label is also added to avoid freeing things that are known to not yet be allocated. A simplified version of the semantic match that finds the first problem is as follows: (http://coccinelle.lip6.fr/) // @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // Signed-off-by: Julia Lawall Signed-off-by: Alexander Graf --- arch/powerpc/kvm/e500_tlb.c | 19 +++++++++++++------ 1 files changed, 13 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index 641f978..c733894 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -1233,21 +1233,27 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, } virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL); - if (!virt) + if (!virt) { + ret = -ENOMEM; goto err_put_page; + } privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0], GFP_KERNEL); privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1], GFP_KERNEL); - if (!privs[0] || !privs[1]) - goto err_put_page; + if (!privs[0] || !privs[1]) { + ret = -ENOMEM; + goto err_privs; + } g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1], GFP_KERNEL); - if (!g2h_bitmap) - goto err_put_page; + if (!g2h_bitmap) { + ret = -ENOMEM; + goto err_privs; + } free_gtlb(vcpu_e500); @@ -1287,10 +1293,11 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, kvmppc_recalc_tlb1map_range(vcpu_e500); return 0; -err_put_page: +err_privs: kfree(privs[0]); kfree(privs[1]); +err_put_page: for (i = 0; i < num_pages; i++) put_page(pages[i]);