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[2620:137:e000::1:20]) by mx.google.com with ESMTP id w4-20020a656944000000b00476c6b9cf69si5673424pgq.856.2022.11.19.01.20.57; Sat, 19 Nov 2022 01:21:15 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232579AbiKSJCn (ORCPT + 99 others); Sat, 19 Nov 2022 04:02:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231403AbiKSJCe (ORCPT ); Sat, 19 Nov 2022 04:02:34 -0500 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 692619A5DD for ; Sat, 19 Nov 2022 01:02:33 -0800 (PST) Received: from dggpeml500023.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4NDnhk1qhNzHvsQ; Sat, 19 Nov 2022 17:01:58 +0800 (CST) Received: from ubuntu1804.huawei.com (10.67.174.58) by dggpeml500023.china.huawei.com (7.185.36.114) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 19 Nov 2022 17:02:31 +0800 From: Xiu Jianfeng To: , , , , , , , CC: , , Subject: [PATCH 2/2] x86/xen: Fix memory leak in xen_init_lock_cpu() Date: Sat, 19 Nov 2022 16:59:23 +0800 Message-ID: <20221119085923.114889-3-xiujianfeng@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221119085923.114889-1-xiujianfeng@huawei.com> References: <20221119085923.114889-1-xiujianfeng@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.174.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml500023.china.huawei.com (7.185.36.114) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749915717736805339?= X-GMAIL-MSGID: =?utf-8?q?1749915717736805339?= In xen_init_lock_cpu(), the @name has allocated new string by kasprintf(), if bind_ipi_to_irqhandler() fails, it should be freed, otherwise may lead to a memory leak issue, fix it. Fixes: 2d9e1e2f58b5 ("xen: implement Xen-specific spinlocks") Signed-off-by: Xiu Jianfeng --- arch/x86/xen/spinlock.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index 043c73dfd2c9..156d3e04c9ef 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -86,7 +86,8 @@ void xen_init_lock_cpu(int cpu) disable_irq(irq); /* make sure it's never delivered */ per_cpu(lock_kicker_irq, cpu) = irq; per_cpu(irq_name, cpu) = name; - } + } else + kfree(name); printk("cpu %d spinlock event irq %d\n", cpu, irq); }