From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756284Ab0IRTCg (ORCPT ); Sat, 18 Sep 2010 15:02:36 -0400 Received: from kroah.org ([198.145.64.141]:51297 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754862Ab0IRTBe (ORCPT ); Sat, 18 Sep 2010 15:01:34 -0400 X-Mailbox-Line: From gregkh@clark.site Sat Sep 18 11:59:56 2010 Message-Id: <20100918185956.170256015@clark.site> User-Agent: quilt/0.48-11.2 Date: Sat, 18 Sep 2010 11:58:03 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Robert Richter Subject: [039/123] oprofile, x86: fix init_sysfs error handling References: <20100918185724.290702750@clark.site> Content-Disposition: inline; filename=oprofile-x86-fix-init_sysfs-error-handling.patch In-Reply-To: <20100918190024.GA14388@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Robert Richter commit 10f0412f57f2a76a90eff4376f59cbb0a39e4e18 upstream. On failure init_sysfs() might not properly free resources. The error code of the function is not checked. And, when reinitializing the exit function might be called twice. This patch fixes all this. Signed-off-by: Robert Richter Signed-off-by: Greg Kroah-Hartman --- arch/x86/oprofile/nmi_int.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -518,8 +518,13 @@ static int __init init_sysfs(void) int error; error = sysdev_class_register(&oprofile_sysclass); - if (!error) - error = sysdev_register(&device_oprofile); + if (error) + return error; + + error = sysdev_register(&device_oprofile); + if (error) + sysdev_class_unregister(&oprofile_sysclass); + return error; } @@ -645,6 +650,8 @@ int __init op_nmi_init(struct oprofile_o char *cpu_type = NULL; int ret = 0; + using_nmi = 0; + if (!cpu_has_apic) return -ENODEV; @@ -727,7 +734,10 @@ int __init op_nmi_init(struct oprofile_o mux_init(ops); - init_sysfs(); + ret = init_sysfs(); + if (ret) + return ret; + using_nmi = 1; printk(KERN_INFO "oprofile: using NMI interrupt.\n"); return 0;