From patchwork Sun Aug 5 09:52:33 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 1274551 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 17D80DFAF5 for ; Sun, 5 Aug 2012 09:54:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754310Ab2HEJws (ORCPT ); Sun, 5 Aug 2012 05:52:48 -0400 Received: from mail4-relais-sop.national.inria.fr ([192.134.164.105]:9388 "EHLO mail4-relais-sop.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754253Ab2HEJwq (ORCPT ); Sun, 5 Aug 2012 05:52:46 -0400 X-IronPort-AV: E=Sophos;i="4.77,715,1336341600"; d="scan'208";a="152465605" Received: from palace.lip6.fr (HELO localhost.localdomain) ([132.227.105.202]) by mail4-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-SHA; 05 Aug 2012 11:52:42 +0200 From: Julia Lawall To: Alexander Graf Cc: kernel-janitors@vger.kernel.org, Avi Kivity , Marcelo Tosatti , Benjamin Herrenschmidt , Paul Mackerras , kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Julia Lawall Subject: [PATCH 3/6] arch/powerpc/kvm/e500_tlb.c: fix error return code Date: Sun, 5 Aug 2012 11:52:33 +0200 Message-Id: <1344160356-387-4-git-send-email-Julia.Lawall@lip6.fr> X-Mailer: git-send-email 1.7.8.6 In-Reply-To: <1344160356-387-1-git-send-email-Julia.Lawall@lip6.fr> References: <1344160356-387-1-git-send-email-Julia.Lawall@lip6.fr> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@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 --- arch/powerpc/kvm/e500_tlb.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index c8f6c58..85fcdf7 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -1176,21 +1176,27 @@ 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); @@ -1230,10 +1236,11 @@ 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]);