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Diffstat (limited to 'kernel/audit.c')
-rw-r--r--kernel/audit.c28
1 files changed, 13 insertions, 15 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index ab2e3d8288f2..b1d24a035ec9 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -991,19 +991,24 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
struct audit_tty_status s, old;
struct task_struct *tsk = current;
struct audit_buffer *ab;
- int res = 0;
+
+ memset(&s, 0, sizeof(s));
+ /* guard against past and future API changes */
+ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
+ /* check if new data is valid */
+ if ((s.enabled != 0 && s.enabled != 1) ||
+ (s.log_passwd != 0 && s.log_passwd != 1))
+ err = -EINVAL;
spin_lock(&tsk->sighand->siglock);
old.enabled = tsk->signal->audit_tty;
old.log_passwd = tsk->signal->audit_tty_log_passwd;
+ if (!err) {
+ tsk->signal->audit_tty = s.enabled;
+ tsk->signal->audit_tty_log_passwd = s.log_passwd;
+ }
spin_unlock(&tsk->sighand->siglock);
- memset(&s, 0, sizeof(s));
- /* guard against past and future API changes */
- memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
- if ((s.enabled == 0 || s.enabled == 1) &&
- (s.log_passwd == 0 || s.log_passwd == 1))
- res = 1;
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=tty_set"
" old-enabled=%d old-log_passwd=%d"
@@ -1011,15 +1016,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
" res=%d",
old.enabled, old.log_passwd,
s.enabled, s.log_passwd,
- res);
+ !err);
audit_log_end(ab);
- if (res) {
- spin_lock(&tsk->sighand->siglock);
- tsk->signal->audit_tty = s.enabled;
- tsk->signal->audit_tty_log_passwd = s.log_passwd;
- spin_unlock(&tsk->sighand->siglock);
- } else
- return -EINVAL;
break;
}
default: