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 BEEA4C433F5 for ; Mon, 25 Apr 2022 22:34:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232174AbiDYWhb (ORCPT ); Mon, 25 Apr 2022 18:37:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230484AbiDYWha (ORCPT ); Mon, 25 Apr 2022 18:37:30 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1418FE5EE for ; Mon, 25 Apr 2022 15:34:24 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1nj7Hh-0006vO-Ig; Tue, 26 Apr 2022 00:34:21 +0200 Date: Tue, 26 Apr 2022 00:34:21 +0200 From: Florian Westphal To: Topi Miettinen Cc: netfilter-devel@vger.kernel.org Subject: Re: [PATCH] netfilter: nft_socket: socket expressions for GID & UID Message-ID: <20220425223421.GA14400@breakpoint.cc> References: <20220420185447.10199-1-toiwoton@gmail.com> <5a292abd-7f2e-728f-5594-86d85fbd1c00@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5a292abd-7f2e-728f-5594-86d85fbd1c00@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Topi Miettinen wrote: > On 20.4.2022 21.54, Topi Miettinen wrote: > > Add socket expressions for checking GID or UID of the originating > > socket. These work also on input side, unlike meta skuid/skgid. > > Unfortunately, there's a reproducible kernel BUG when closing a local > connection: > > Apr 25 21:18:13 kernel: > ================================================================== > Apr 25 21:18:13 kernel: BUG: KASAN: null-ptr-deref in > nf_sk_lookup_slow_v6+0x45b/0x590 [nf_socket_ipv6] You can pass this to scripts/faddr2line to get the location of the null deref.