xfrm: Fix acquire state insertion.

BugLink: https://bugs.launchpad.net/bugs/2111953

commit a356728 upstream.

A recent commit jumped over the dst hash computation and
left the symbol uninitialized. Fix this by explicitly
computing the dst hash before it is used.

Fixes: 0045e3d ("xfrm: Cache used outbound xfrm states at the policy.")
Reported-by: Dan Carpenter <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Steffen Klassert <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Manuel Diewald <[email protected]>
Signed-off-by: Mehmet Basaran <[email protected]>

Author: klassert

net/xfrm/xfrm_state.c

@@ -1510,6 +1510,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
 			spin_lock_bh(&net->xfrm.xfrm_state_lock);
 			x->km.state = XFRM_STATE_ACQ;
 			list_add(&x->km.all, &net->xfrm.state_all);
+			h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
 			XFRM_STATE_INSERT(bydst, &x->bydst,
 					  net->xfrm.state_bydst + h,
 					  x->xso.type);