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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by SN1PEPF000252A3.mail.protection.outlook.com (10.167.242.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7452.22 via Frontend Transport; Mon, 8 Apr 2024 06:57:31 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Sun, 7 Apr 2024 23:57:13 -0700 Received: from localhost (10.126.231.35) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.12; Sun, 7 Apr 2024 23:57:12 -0700 Date: Mon, 8 Apr 2024 09:57:10 +0300 From: Leon Romanovsky To: Yi Zhang CC: RDMA mailing list , Shinichiro Kawasaki , Jason Gunthorpe Subject: Re: [bug report] kmemleak in rdma_core observed during blktests nvme/rdma use siw Message-ID: <20240408065710.GC8764@unreal> References: <20240408063907.GB8764@unreal> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Apr 2024 06:57:31.9284 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 472a68ad-9088-40b8-9eda-08dc579929ae X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000252A3.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6782 On Mon, Apr 08, 2024 at 09:39:07AM +0300, Leon Romanovsky wrote: > On Mon, Apr 08, 2024 at 02:03:51PM +0800, Yi Zhang wrote: > > Hi > > I found the below kmemleak issue during blktests nvme/rdma on the > > latest linux-rdma/for-next, please help check it and let me know if > > you need any info/testing for it, thanks. > > > > # dmesg | grep kmemleak > > [ 67.130652] kmemleak: Kernel memory leak detector initialized (mem > > pool available: 36041) > > [ 67.130728] kmemleak: Automatic memory scanning thread started > > [ 1051.771867] kmemleak: 2 new suspected memory leaks (see > > /sys/kernel/debug/kmemleak) > > [ 1832.796189] kmemleak: 8 new suspected memory leaks (see > > /sys/kernel/debug/kmemleak) > > [ 2578.189075] kmemleak: 17 new suspected memory leaks (see > > /sys/kernel/debug/kmemleak) > > [ 3330.710984] kmemleak: 4 new suspected memory leaks (see > > /sys/kernel/debug/kmemleak) > > > > unreferenced object 0xffff88855da53400 (size 192): > > comm "rdma", pid 10630, jiffies 4296575922 > > hex dump (first 32 bytes): > > 37 00 00 00 00 00 00 00 c0 ff ff ff 1f 00 00 00 7............... > > 10 34 a5 5d 85 88 ff ff 10 34 a5 5d 85 88 ff ff .4.].....4.].... > > backtrace (crc 47f66721): > > [] kmalloc_trace+0x30d/0x3b0 > > [] alloc_gid_entry+0x47/0x380 [ib_core] > > [] add_modify_gid+0x166/0x930 [ib_core] > > [] ib_cache_update.part.0+0x6d8/0x910 [ib_core] > > [] ib_cache_setup_one+0x24a/0x350 [ib_core] > > [] ib_register_device+0x9e/0x3a0 [ib_core] > > [] 0xffffffffc2a3d389 > > [] nldev_newlink+0x2b8/0x520 [ib_core] > > My guess is that your test didn't call too nldev_dellink() and left > device registered. Sorry, I was wrong, it looks like GID entry leak. Thanks > > Thanks > > > [] rdma_nl_rcv_msg+0x2c3/0x520 [ib_core] > > [] > > rdma_nl_rcv_skb.constprop.0.isra.0+0x23c/0x3a0 [ib_core] > > [] netlink_unicast+0x445/0x710 > > [] netlink_sendmsg+0x761/0xc40 > > [] __sys_sendto+0x3a9/0x420 > > [] __x64_sys_sendto+0xdc/0x1b0 > > [] do_syscall_64+0x93/0x180 > > [] entry_SYSCALL_64_after_hwframe+0x71/0x79 > > > > -- > > Best Regards, > > Yi Zhang > > > > >