audit: use spin_lock in audit_receive_msg to process tty logging

This function is called when we receive a netlink message from
userspace.  We don't need to worry about it coming from irq context or
irqs making it re-entrant.

Signed-off-by: Eric Paris <eparis@redhat.com>

diff --git a/kernel/audit.c b/kernel/audit.c
index 998a0d4..d308723 100644 (file)
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -805,12 +805,11 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
        case AUDIT_TTY_GET: {
                struct audit_tty_status s;
                struct task_struct *tsk = current;
-               unsigned long flags;
 
-               spin_lock_irqsave(&tsk->sighand->siglock, flags);
+               spin_lock(&tsk->sighand->siglock);
                s.enabled = tsk->signal->audit_tty != 0;
                s.log_passwd = tsk->signal->audit_tty_log_passwd;
-               spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
+               spin_unlock(&tsk->sighand->siglock);
 
                audit_send_reply(NETLINK_CB(skb).portid, seq,
                                 AUDIT_TTY_GET, 0, 0, &s, sizeof(s));
@@ -819,7 +818,6 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
        case AUDIT_TTY_SET: {
                struct audit_tty_status s;
                struct task_struct *tsk = current;
-               unsigned long flags;
 
                memset(&s, 0, sizeof(s));
                /* guard against past and future API changes */
@@ -828,10 +826,10 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                    (s.log_passwd != 0 && s.log_passwd != 1))
                        return -EINVAL;
 
-               spin_lock_irqsave(&tsk->sighand->siglock, flags);
+               spin_lock(&tsk->sighand->siglock);
                tsk->signal->audit_tty = s.enabled;
                tsk->signal->audit_tty_log_passwd = s.log_passwd;
-               spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
+               spin_unlock(&tsk->sighand->siglock);
                break;
        }
        default: