[PATCH v5 1/6] seccomp: create internal mode-setting function

From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
	Andy Lutomirski <luto@amacapital.net>,
	Oleg Nesterov <oleg@redhat.com>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Peter Zijlstra <peterz@infradead.org>,
	James Morris <james.l.morris@oracle.com>,
	Eric Paris <eparis@redhat.com>, Juri Lelli <juri.lelli@gmail.com>,
	John Stultz <john.stultz@linaro.org>,
	"David S. Miller" <davem@davemloft.net>,
	Daniel Borkmann <dborkman@redhat.com>,
	Alex Thorlton <athorlton@sgi.com>, Rik van Riel <riel@redhat.com>,
	Daeseok Youn <daeseok.youn@gmail.com>,
	David Rientjes <rientjes@google.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Dario Faggioli <raistlin@linux.it>,
	Rashika Kheria <rashika.kheria@gmail.com>,
	liguang <lig.fnst@cn.fujitsu.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	linux-doc@vger.kernel.org, linux-security-module@vger.kernel.org
Subject: [PATCH v5 1/6] seccomp: create internal mode-setting function
Date: Thu, 22 May 2014 16:05:31 -0700	[thread overview]
Message-ID: <1400799936-26499-2-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1400799936-26499-1-git-send-email-keescook@chromium.org>

In preparation for having other callers of the seccomp mode setting
logic, split the prctl entry point away from the core logic that performs
seccomp mode setting.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 kernel/seccomp.c |   19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index b35c21503a36..8bbe20111222 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -465,7 +465,7 @@ long prctl_get_seccomp(void)
 }
 
 /**
- * prctl_set_seccomp: configures current->seccomp.mode
+ * seccomp_set_mode: internal function for setting seccomp mode
  * @seccomp_mode: requested mode to use
  * @filter: optional struct sock_fprog for use with SECCOMP_MODE_FILTER
  *
@@ -478,7 +478,7 @@ long prctl_get_seccomp(void)
  *
  * Returns 0 on success or -EINVAL on failure.
  */
-long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
+static long seccomp_set_mode(unsigned long seccomp_mode, char __user *filter)
 {
 	long ret = -EINVAL;
 
@@ -509,3 +509,18 @@ long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
 out:
 	return ret;
 }
+
+/**
+ * prctl_set_seccomp: configures current->seccomp.mode
+ * @seccomp_mode: requested mode to use
+ * @filter: optional struct sock_fprog for use with SECCOMP_MODE_FILTER
+ *
+ * Returns 0 on success or -EINVAL on failure.
+ */
+long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
+{
+	long ret;
+
+	ret = seccomp_set_mode(seccomp_mode, filter);
+	return ret;
+}
-- 
1.7.9.5

