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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 563D5C2D0DB for ; Fri, 24 Jan 2020 14:22:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22CBD2467B for ; Fri, 24 Jan 2020 14:22:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579875753; bh=BCF3DENsae70C9wEJ6TwFWjlWYssD7mrLzFYTpJrthg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KF1xnByZgeAmaX12XbWeEzviUt1/lPhWY3/9/6wSWk0NeUCHziVP6XbKWsKEqfiSq rpbVdtJDT/VuhWFsZUMkhs+5djsHO5Uo62n8MnErFr5VsDlt0Wt8BX1nD6bN0Ealwv OcfrXwtM6iMfQBp/zOBdzbFH/qjnWXp+BYSMMUXM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392393AbgAXOWc (ORCPT ); Fri, 24 Jan 2020 09:22:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:44586 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405448AbgAXOW2 (ORCPT ); Fri, 24 Jan 2020 09:22:28 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0047422527; Fri, 24 Jan 2020 14:22:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579875748; bh=BCF3DENsae70C9wEJ6TwFWjlWYssD7mrLzFYTpJrthg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rg++z94EEKuyC74YADpC+DNMCWpdgQi9Xyp5KKFa5DkR3ufMRHzmYbU/q1L0iBe4t XhcoYZ9hg3/DZ65PBNTEogBvBP1VSIhgkuNoK12WWGx8pAYr3Kmhh0m6+s+XvNIggv c3TL7mCS4b1zq0WwujAErZFh+AJwfOeR49u3Mez4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Cong Wang , syzbot+4c3cc6dbe7259dbf9054@syzkaller.appspotmail.com, Jozsef Kadlecsik , Pablo Neira Ayuso , Sasha Levin , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 5/9] netfilter: fix a use-after-free in mtype_destroy() Date: Fri, 24 Jan 2020 09:22:17 -0500 Message-Id: <20200124142221.31201-5-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200124142221.31201-1-sashal@kernel.org> References: <20200124142221.31201-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org From: Cong Wang [ Upstream commit c120959387efa51479056fd01dc90adfba7a590c ] map->members is freed by ip_set_free() right before using it in mtype_ext_cleanup() again. So we just have to move it down. Reported-by: syzbot+4c3cc6dbe7259dbf9054@syzkaller.appspotmail.com Fixes: 40cd63bf33b2 ("netfilter: ipset: Support extensions which need a per data destroy function") Acked-by: Jozsef Kadlecsik Signed-off-by: Cong Wang Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/ipset/ip_set_bitmap_gen.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/ipset/ip_set_bitmap_gen.h b/net/netfilter/ipset/ip_set_bitmap_gen.h index b0bc475f641e3..adc703ccd68bd 100644 --- a/net/netfilter/ipset/ip_set_bitmap_gen.h +++ b/net/netfilter/ipset/ip_set_bitmap_gen.h @@ -66,9 +66,9 @@ mtype_destroy(struct ip_set *set) if (SET_WITH_TIMEOUT(set)) del_timer_sync(&map->gc); - ip_set_free(map->members); if (set->dsize && set->extensions & IPSET_EXT_DESTROY) mtype_ext_cleanup(set); + ip_set_free(map->members); ip_set_free(map); set->data = NULL; -- 2.20.1