From patchwork Mon May 6 15:25:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yue Haibing X-Patchwork-Id: 1095891 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44yRST3f7Xz9sNR for ; Tue, 7 May 2019 01:27:37 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726814AbfEFP1d (ORCPT ); Mon, 6 May 2019 11:27:33 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:45292 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726414AbfEFP1c (ORCPT ); Mon, 6 May 2019 11:27:32 -0400 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 60A73F152B13A524385D; Mon, 6 May 2019 23:27:30 +0800 (CST) Received: from localhost (10.177.31.96) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.439.0; Mon, 6 May 2019 23:27:22 +0800 From: YueHaibing To: , , , CC: , , YueHaibing Subject: [PATCH] net: dsa: Fix error cleanup path in dsa_init_module Date: Mon, 6 May 2019 23:25:29 +0800 Message-ID: <20190506152529.6292-1-yuehaibing@huawei.com> X-Mailer: git-send-email 2.10.2.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.177.31.96] X-CFilter-Loop: Reflected Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org BUG: unable to handle kernel paging request at ffffffffa01c5430 PGD 3270067 P4D 3270067 PUD 3271063 PMD 230bc5067 PTE 0 Oops: 0000 [#1 CPU: 0 PID: 6159 Comm: modprobe Not tainted 5.1.0+ #33 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014 RIP: 0010:raw_notifier_chain_register+0x16/0x40 Code: 63 f8 66 90 e9 5d ff ff ff 90 90 90 90 90 90 90 90 90 90 90 55 48 8b 07 48 89 e5 48 85 c0 74 1c 8b 56 10 3b 50 10 7e 07 eb 12 <39> 50 10 7c 0d 48 8d 78 08 48 8b 40 08 48 85 c0 75 ee 48 89 46 08 RSP: 0018:ffffc90001c33c08 EFLAGS: 00010282 RAX: ffffffffa01c5420 RBX: ffffffffa01db420 RCX: 4fcef45928070a8b RDX: 0000000000000000 RSI: ffffffffa01db420 RDI: ffffffffa01b0068 RBP: ffffc90001c33c08 R08: 000000003e0a33d0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000094443661 R12: ffff88822c320700 R13: ffff88823109be80 R14: 0000000000000000 R15: ffffc90001c33e78 FS: 00007fab8bd08540(0000) GS:ffff888237a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa01c5430 CR3: 00000002297ea000 CR4: 00000000000006f0 Call Trace: register_netdevice_notifier+0x43/0x250 ? 0xffffffffa01e0000 dsa_slave_register_notifier+0x13/0x70 [dsa_core ? 0xffffffffa01e0000 dsa_init_module+0x2e/0x1000 [dsa_core do_one_initcall+0x6c/0x3cc ? do_init_module+0x22/0x1f1 ? rcu_read_lock_sched_held+0x97/0xb0 ? kmem_cache_alloc_trace+0x325/0x3b0 do_init_module+0x5b/0x1f1 load_module+0x1db1/0x2690 ? m_show+0x1d0/0x1d0 __do_sys_finit_module+0xc5/0xd0 __x64_sys_finit_module+0x15/0x20 do_syscall_64+0x6b/0x1d0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Cleanup allocated resourses if there are errors, otherwise it will trgger memleak. Fixes: c9eb3e0f8701 ("net: dsa: Add support for learning FDB through notification") Signed-off-by: YueHaibing Reviewed-by: Vivien Didelot Reviewed-by: Andrew Lunn --- net/dsa/dsa.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 36de4f2..cb080ef 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -344,15 +344,22 @@ static int __init dsa_init_module(void) rc = dsa_slave_register_notifier(); if (rc) - return rc; + goto register_notifier_fail; rc = dsa_legacy_register(); if (rc) - return rc; + goto legacy_register_fail; dev_add_pack(&dsa_pack_type); return 0; + +legacy_register_fail: + dsa_slave_unregister_notifier(); +register_notifier_fail: + destroy_workqueue(dsa_owq); + + return rc; } module_init(dsa_init_module);