Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755286Ab1FCUcU (ORCPT ); Fri, 3 Jun 2011 16:32:20 -0400 Received: from mail-gx0-f174.google.com ([209.85.161.174]:59643 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754830Ab1FCUcT (ORCPT ); Fri, 3 Jun 2011 16:32:19 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=FS+S1fdxz2NHfWfQZSQTjUf7oUYVKRJbf09vZP+fekdxQsPdiDnxXrmsH4UbKCgggH Af1V+TEWsp4/X9Dt4DzH8CGmSMTr/mxuUAt6ibb/PbrOgg3emhCLP4oa2zKfbAswBzsM P/vXBbvPcF2OoEahAMUbqyjxo4PxDYbLOmxBI= From: Will Drewry To: linux-kernel@vger.kernel.org Cc: kees.cook@canonical.com, torvalds@linux-foundation.org, tglx@linutronix.de, mingo@elte.hu, rostedt@goodmis.org, jmorris@namei.org, paulmck@linux.vnet.ibm.com, Will Drewry Subject: [PATCH v4 04/13] seccomp_filter: add process state reporting Date: Fri, 3 Jun 2011 15:34:03 -0500 Message-Id: <1307133252-23259-4-git-send-email-wad@chromium.org> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1307133252-23259-1-git-send-email-wad@chromium.org> References: <1307133252-23259-1-git-send-email-wad@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3133 Lines: 88 Adds seccomp and seccomp_filter status reporting to proc. /proc//seccomp_filter provides the current seccomp mode and the list of allowed or dynamically filtered system calls. v4: move from rcu guard to mutex guard v3: changed to using filters directly. v2: removed status entry, added seccomp file. (requested by kosaki.motohiro@jp.fujitsu.com) allowed S_IRUGO reading of entries (requested by viro@zeniv.linux.org.uk) added flags got rid of the seccomp_t type dropped seccomp file Signed-off-by: Will Drewry --- fs/proc/base.c | 29 +++++++++++++++++++++++++++++ 1 files changed, 29 insertions(+), 0 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index dfa5327..6dc4df8 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -73,6 +73,7 @@ #include #include #include +#include #include #include #include @@ -579,6 +580,28 @@ static int proc_pid_syscall(struct task_struct *task, char *buffer) } #endif /* CONFIG_HAVE_ARCH_TRACEHOOK */ +/* + * Print out the current seccomp filter set for the task. + */ +#ifdef CONFIG_SECCOMP_FILTER +int proc_pid_seccomp_filter_show(struct seq_file *m, struct pid_namespace *ns, + struct pid *pid, struct task_struct *task) +{ + struct seccomp_filters *filters; + /* Avoid allowing other processes to incur too much added contention by + * only acquiring a reference under the task-wide mutex. + */ + if (mutex_lock_killable(&task->seccomp.filters_guard)) + return -1; + filters = get_seccomp_filter(task->seccomp.filters); + mutex_unlock(&task->seccomp.filters_guard); + + seccomp_show_filters(filters, m); + put_seccomp_filter(filters); + return 0; +} +#endif /* CONFIG_SECCOMP_FILTER */ + /************************************************************************/ /* Here the fs part begins */ /************************************************************************/ @@ -2838,6 +2861,9 @@ static const struct pid_entry tgid_base_stuff[] = { #ifdef CONFIG_HAVE_ARCH_TRACEHOOK INF("syscall", S_IRUGO, proc_pid_syscall), #endif +#ifdef CONFIG_SECCOMP_FILTER + ONE("seccomp_filter", S_IRUGO, proc_pid_seccomp_filter_show), +#endif INF("cmdline", S_IRUGO, proc_pid_cmdline), ONE("stat", S_IRUGO, proc_tgid_stat), ONE("statm", S_IRUGO, proc_pid_statm), @@ -3180,6 +3206,9 @@ static const struct pid_entry tid_base_stuff[] = { #ifdef CONFIG_HAVE_ARCH_TRACEHOOK INF("syscall", S_IRUGO, proc_pid_syscall), #endif +#ifdef CONFIG_SECCOMP_FILTER + ONE("seccomp_filter", S_IRUGO, proc_pid_seccomp_filter_show), +#endif INF("cmdline", S_IRUGO, proc_pid_cmdline), ONE("stat", S_IRUGO, proc_tid_stat), ONE("statm", S_IRUGO, proc_pid_statm), -- 1.7.0.4 -- 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/