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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 684B5C43381 for ; Tue, 12 Mar 2019 17:18:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 37B9C2184C for ; Tue, 12 Mar 2019 17:18:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411094; bh=G5s0SzSqw/9cxICq86eJLFTmKj1AJL4RwoWuktxPsfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=F++5+gMKUVDYqLe5DUDH9AnzZi8y+YmE76fgnphK6UnQM2KPD+0tHNLl0oFiU48TD pVR72/rbRirv9yv1k9dww4A6bY+xRo8clX/dD23piBC521IsPQeE1yd/cMiu57FeLl +pQ9zI+8459v1FWzOHJA7/A+ptdGNjLg8zwPsmQo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729982AbfCLRSM (ORCPT ); Tue, 12 Mar 2019 13:18:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:33182 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727762AbfCLRR0 (ORCPT ); Tue, 12 Mar 2019 13:17:26 -0400 Received: from localhost (unknown [104.133.8.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 043BE21874; Tue, 12 Mar 2019 17:17:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411046; bh=G5s0SzSqw/9cxICq86eJLFTmKj1AJL4RwoWuktxPsfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jze/893k0wPQ+dMeDRxVihk/5Tg9zYPmFpoxEkKh3EHh6dKEXm6XDGF3IQXTbG5Fj O3u+DcY4I34n4F66KO3aUef8Zn95wqHVxiVIB/eLyDw2k2wNmNdt87z0ZvqLbZOdHx NJ5RjbBcus3tKbdH/IoqjE3KbMcZdP0xyl9msK9c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mao Wenan , "David S. Miller" Subject: [PATCH 4.9 20/96] net: sit: fix memory leak in sit_init_net() Date: Tue, 12 Mar 2019 10:09:38 -0700 Message-Id: <20190312171036.054388469@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312171034.530434962@linuxfoundation.org> References: <20190312171034.530434962@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mao Wenan [ Upstream commit 07f12b26e21ab359261bf75cfcb424fdc7daeb6d ] If register_netdev() is failed to register sitn->fb_tunnel_dev, it will go to err_reg_dev and forget to free netdev(sitn->fb_tunnel_dev). BUG: memory leak unreferenced object 0xffff888378daad00 (size 512): comm "syz-executor.1", pid 4006, jiffies 4295121142 (age 16.115s) hex dump (first 32 bytes): 00 e6 ed c0 83 88 ff ff 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000d6dcb63e>] kvmalloc include/linux/mm.h:577 [inline] [<00000000d6dcb63e>] kvzalloc include/linux/mm.h:585 [inline] [<00000000d6dcb63e>] netif_alloc_netdev_queues net/core/dev.c:8380 [inline] [<00000000d6dcb63e>] alloc_netdev_mqs+0x600/0xcc0 net/core/dev.c:8970 [<00000000867e172f>] sit_init_net+0x295/0xa40 net/ipv6/sit.c:1848 [<00000000871019fa>] ops_init+0xad/0x3e0 net/core/net_namespace.c:129 [<00000000319507f6>] setup_net+0x2ba/0x690 net/core/net_namespace.c:314 [<0000000087db4f96>] copy_net_ns+0x1dc/0x330 net/core/net_namespace.c:437 [<0000000057efc651>] create_new_namespaces+0x382/0x730 kernel/nsproxy.c:107 [<00000000676f83de>] copy_namespaces+0x2ed/0x3d0 kernel/nsproxy.c:165 [<0000000030b74bac>] copy_process.part.27+0x231e/0x6db0 kernel/fork.c:1919 [<00000000fff78746>] copy_process kernel/fork.c:1713 [inline] [<00000000fff78746>] _do_fork+0x1bc/0xe90 kernel/fork.c:2224 [<000000001c2e0d1c>] do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290 [<00000000ec48bd44>] entry_SYSCALL_64_after_hwframe+0x49/0xbe [<0000000039acff8a>] 0xffffffffffffffff Signed-off-by: Mao Wenan Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/sit.c | 1 + 1 file changed, 1 insertion(+) --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1851,6 +1851,7 @@ static int __net_init sit_init_net(struc err_reg_dev: ipip6_dev_free(sitn->fb_tunnel_dev); + free_netdev(sitn->fb_tunnel_dev); err_alloc_dev: return err; }