xfrm/compat: Translate 32-bit user_policy from sockptr
Provide compat_xfrm_userpolicy_info translation for xfrm setsocketopt().
Reallocate buffer and put the missing padding for 64-bit message.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index cc206ca..f996188 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -2331,9 +2331,6 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
struct xfrm_mgr *km;
struct xfrm_policy *pol = NULL;
- if (in_compat_syscall())
- return -EOPNOTSUPP;
-
if (sockptr_is_null(optval) && !optlen) {
xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
@@ -2348,6 +2345,20 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
if (IS_ERR(data))
return PTR_ERR(data);
+ if (in_compat_syscall()) {
+ struct xfrm_translator *xtr = xfrm_get_translator();
+
+ if (!xtr)
+ return -EOPNOTSUPP;
+
+ err = xtr->xlate_user_policy_sockptr(&data, optlen);
+ xfrm_put_translator(xtr);
+ if (err) {
+ kfree(data);
+ return err;
+ }
+ }
+
err = -EINVAL;
rcu_read_lock();
list_for_each_entry_rcu(km, &xfrm_km_list, list) {
