linux-kernel - [PATCH 05/27] audit: kill audit_prepare_user

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Message-Id: <1348105949-25454-5-git-send-email-ebiederm@xmission.com>
Date:	Wed, 19 Sep 2012 18:52:07 -0700
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	<linux-kernel@...r.kernel.org>
Cc:	<linux-fsdevel@...r.kernel.org>, Serge Hallyn <serge@...lyn.com>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	linux-security-module@...r.kernel.org, Jan Kara <jack@...e.cz>,
	Dave Chinner <david@...morbit.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Eric Paris <eparis@...hat.com>,
	David Miller <davem@...emloft.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 05/27] audit: kill audit_prepare_user_tty

From: "Eric W. Biederman" <ebiederm@...ssion.com>

Now that netlink messages are processed in the context of the sender
tty_audit_push_task can be called directly and audit_prepare_user_tty
which only added looking up the task of the tty by process id is
not needed.

Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Eric Paris <eparis@...hat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 kernel/audit.c |   20 +-------------------
 1 files changed, 1 insertions(+), 19 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index fecb150..58f704b 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -468,24 +468,6 @@ static int kauditd_thread(void *dummy)
 	return 0;
 }
 
-static int audit_prepare_user_tty(pid_t pid, uid_t loginuid, u32 sessionid)
-{
-	struct task_struct *tsk;
-	int err;
-
-	rcu_read_lock();
-	tsk = find_task_by_vpid(pid);
-	if (!tsk) {
-		rcu_read_unlock();
-		return -ESRCH;
-	}
-	get_task_struct(tsk);
-	rcu_read_unlock();
-	err = tty_audit_push_task(tsk, loginuid, sessionid);
-	put_task_struct(tsk);
-	return err;
-}
-
 int audit_send_list(void *_dest)
 {
 	struct audit_netlink_list *dest = _dest;
@@ -748,7 +730,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		if (err == 1) {
 			err = 0;
 			if (msg_type == AUDIT_USER_TTY) {
-				err = audit_prepare_user_tty(pid, loginuid,
+				err = tty_audit_push_task(current, loginuid,
 							     sessionid);
 				if (err)
 					break;
-- 
1.7.5.4

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