From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9684C2FC14 for ; Thu, 17 Aug 2023 09:03:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349231AbjHQJCu (ORCPT ); Thu, 17 Aug 2023 05:02:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242446AbjHQJCd (ORCPT ); Thu, 17 Aug 2023 05:02:33 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65A1910C8 for ; Thu, 17 Aug 2023 02:02:32 -0700 (PDT) Received: from dggpeml500002.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4RRJpB1kgbzNmy7; Thu, 17 Aug 2023 16:58:58 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpeml500002.china.huawei.com (7.185.36.158) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 17 Aug 2023 17:02:30 +0800 From: Junhao He To: , , , CC: , , , , , , , Subject: [PATCH 0/2] Fix memory leak in coresight drivers Date: Thu, 17 Aug 2023 16:59:35 +0800 Message-ID: <20230817085937.55590-1-hejunhao3@huawei.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml500002.china.huawei.com (7.185.36.158) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When build kernel with CONFIG_KASAN=y there are reports of memory leaks, like: ... unreferenced object 0xffff2020510fe200 (size 64): comm "insmod", pid 4642, jiffies 4295983961 (age 46049.752s) hex dump (first 32 bytes): 10 20 40 06 28 20 ff ff 10 40 7f 06 20 20 ff ff . @.( ...@.. .. 10 20 bb 8a 20 00 ff ff 10 e0 c7 8a 20 00 ff ff . .. ....... ... backtrace: [<0000000034ec4724>] __kmem_cache_alloc_node+0x2f8/0x348 [<0000000057fbc15d>] __kmalloc_node_track_caller+0x5c/0x110 [<0000000055d5e34b>] krealloc+0x8c/0x178 [<00000000a4635beb>] coresight_alloc_device_name+0x128/0x188 [coresight] [<000000000ce9d17b>] smb_probe+0x268/0x478 [ultrasoc_smb] ... unreferenced object 0xffff00213c141000 (size 1024): comm "systemd-udevd", pid 2123, jiffies 4294909467 (age 6062.160s) hex dump (first 32 bytes): 04 00 00 00 02 00 00 00 18 10 14 3c 21 00 ff ff ...........] __kmem_cache_alloc_node+0x2f8/0x348 [<00000000b0fc7ceb>] __kmalloc+0x58/0x108 [<0000000064ff4695>] acpi_os_allocate+0x2c/0x68 [<000000007d57d116>] acpi_ut_initialize_buffer+0x54/0xe0 [<0000000024583908>] acpi_evaluate_object+0x388/0x438 [<0000000017b2e72b>] acpi_evaluate_object_typed+0xe8/0x240 [<000000005df0eac2>] coresight_get_platform_data+0x1b4/0x988 [coresight] ... The patchset based on "coresight: platform: acpi: Ignore the absence of graph" https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git/commit/?h=next&id=3a2888aa1f962c55ca36119aebe67355c7bf54e4 Junhao He (2): coresight: Fix memory leak in acpi_buffer->pointer coresight: core: fix memory leak in dict->fwnode_list drivers/hwtracing/coresight/coresight-core.c | 20 +++++++++- .../hwtracing/coresight/coresight-platform.c | 40 ++++++++++++------- 2 files changed, 45 insertions(+), 15 deletions(-) -- 2.33.0