From patchwork Tue May 1 12:36:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dennis Dalessandro X-Patchwork-Id: 10373809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DD24E6032A for ; Tue, 1 May 2018 12:36:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD5A928A5A for ; Tue, 1 May 2018 12:36:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C216628C5B; Tue, 1 May 2018 12:36:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5D48D28A5A for ; Tue, 1 May 2018 12:36:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755188AbeEAMgQ (ORCPT ); Tue, 1 May 2018 08:36:16 -0400 Received: from mga09.intel.com ([134.134.136.24]:54855 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755044AbeEAMgP (ORCPT ); Tue, 1 May 2018 08:36:15 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 May 2018 05:36:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,351,1520924400"; d="scan'208";a="45890918" Received: from scymds01.sc.intel.com ([10.82.194.37]) by FMSMGA003.fm.intel.com with ESMTP; 01 May 2018 05:36:14 -0700 Received: from scvm10.sc.intel.com (scvm10.sc.intel.com [10.82.195.27]) by scymds01.sc.intel.com with ESMTP id w41CaDop008303; Tue, 1 May 2018 05:36:13 -0700 Received: from scvm10.sc.intel.com (localhost [127.0.0.1]) by scvm10.sc.intel.com with ESMTP id w41CaDgi025467; Tue, 1 May 2018 05:36:13 -0700 Subject: [PATCH for-rc v2 6/6] IB/hfi1: Fix memory leak in exception path in get_irq_affinity() From: Dennis Dalessandro To: jgg@ziepe.ca, dledford@redhat.com Cc: linux-rdma@vger.kernel.org, "Michael J. Ruhl" , Mike Marciniszyn , Sebastian Sanchez Date: Tue, 01 May 2018 05:36:13 -0700 Message-ID: <20180501123611.24520.92034.stgit@scvm10.sc.intel.com> In-Reply-To: <20180501123317.24520.8848.stgit@scvm10.sc.intel.com> References: <20180501123317.24520.8848.stgit@scvm10.sc.intel.com> User-Agent: StGit/0.17.1-18-g2e886-dirty MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sebastian Sanchez When IRQ affinity is set and the interrupt type is unknown, a cpu mask allocated within the function is never freed. Fix this memory leak by allocating memory within the scope where it is used. Reviewed-by: Mike Marciniszyn Reviewed-by: Michael J. Ruhl Signed-off-by: Sebastian Sanchez Signed-off-by: Dennis Dalessandro --- drivers/infiniband/hw/hfi1/affinity.c | 11 +++++------ 1 files changed, 5 insertions(+), 6 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" 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/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c index a97055d..b5fab55 100644 --- a/drivers/infiniband/hw/hfi1/affinity.c +++ b/drivers/infiniband/hw/hfi1/affinity.c @@ -412,7 +412,6 @@ static void hfi1_cleanup_sdma_notifier(struct hfi1_msix_entry *msix) static int get_irq_affinity(struct hfi1_devdata *dd, struct hfi1_msix_entry *msix) { - int ret; cpumask_var_t diff; struct hfi1_affinity_node *entry; struct cpu_mask_set *set = NULL; @@ -424,10 +423,6 @@ static int get_irq_affinity(struct hfi1_devdata *dd, extra[0] = '\0'; cpumask_clear(&msix->mask); - ret = zalloc_cpumask_var(&diff, GFP_KERNEL); - if (!ret) - return -ENOMEM; - entry = node_affinity_lookup(dd->node); switch (msix->type) { @@ -458,6 +453,9 @@ static int get_irq_affinity(struct hfi1_devdata *dd, * finds its CPU here. */ if (cpu == -1 && set) { + if (!zalloc_cpumask_var(&diff, GFP_KERNEL)) + return -ENOMEM; + if (cpumask_equal(&set->mask, &set->used)) { /* * We've used up all the CPUs, bump up the generation @@ -469,6 +467,8 @@ static int get_irq_affinity(struct hfi1_devdata *dd, cpumask_andnot(diff, &set->mask, &set->used); cpu = cpumask_first(diff); cpumask_set_cpu(cpu, &set->used); + + free_cpumask_var(diff); } cpumask_set_cpu(cpu, &msix->mask); @@ -482,7 +482,6 @@ static int get_irq_affinity(struct hfi1_devdata *dd, hfi1_setup_sdma_notifier(msix); } - free_cpumask_var(diff); return 0; }