Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754018Ab2B0RTR (ORCPT ); Mon, 27 Feb 2012 12:19:17 -0500 Received: from mx1.redhat.com ([209.132.183.28]:4042 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753534Ab2B0RTP (ORCPT ); Mon, 27 Feb 2012 12:19:15 -0500 Date: Mon, 27 Feb 2012 18:11:32 +0100 From: Oleg Nesterov To: Will Drewry Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com, netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de, davem@davemloft.net, hpa@zytor.com, mingo@redhat.com, peterz@infradead.org, rdunlap@xenotime.net, mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu, eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org, scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com, akpm@linux-foundation.org, corbet@lwn.net, eric.dumazet@gmail.com, markus@chromium.org, coreyb@linux.vnet.ibm.com, keescook@chromium.org Subject: Re: [PATCH v11 07/12] seccomp: add SECCOMP_RET_ERRNO Message-ID: <20120227171132.GB10608@redhat.com> References: <1330140111-17201-1-git-send-email-wad@chromium.org> <1330140111-17201-7-git-send-email-wad@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1330140111-17201-7-git-send-email-wad@chromium.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 789 Lines: 26 On 02/24, Will Drewry wrote: > > static u32 seccomp_run_filters(int syscall) > { > struct seccomp_filter *f; > - u32 ret = SECCOMP_RET_KILL; > static const struct bpf_load_fn fns = { > bpf_load, > sizeof(struct seccomp_data), > }; > + u32 ret = SECCOMP_RET_ALLOW; > const void *sc_ptr = (const void *)(uintptr_t)syscall; > > + /* Ensure unexpected behavior doesn't result in failing open. */ > + if (unlikely(current->seccomp.filter == NULL)) > + ret = SECCOMP_RET_KILL; Is "seccomp.filter == NULL" really possible? Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/