xfrm: always initialize offload path

Offload path is used for GRO with SW IPsec, and not just for HW
offload. So initialize it anyway.

Fixes: 585b64f ("xfrm: delay initialization of offload path till its actually requested")
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Closes: https://lore.kernel.org/all/aEGW_5HfPqU1rFjl@krikkit
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

Author: rleon

include/net/xfrm.h

@@ -474,7 +474,7 @@ struct xfrm_type_offload {
 
 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
-void xfrm_set_type_offload(struct xfrm_state *x);
+void xfrm_set_type_offload(struct xfrm_state *x, bool try_load);
 static inline void xfrm_unset_type_offload(struct xfrm_state *x)
 {
 	if (!x->type_offload)

net/xfrm/xfrm_device.c

@@ -305,7 +305,6 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 		return -EINVAL;
 	}
 
-	xfrm_set_type_offload(x);
 	if (!x->type_offload) {
 		NL_SET_ERR_MSG(extack, "Type doesn't support offload");
 		dev_put(dev);

net/xfrm/xfrm_state.c

@@ -424,11 +424,10 @@ void xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
 }
 EXPORT_SYMBOL(xfrm_unregister_type_offload);
 
-void xfrm_set_type_offload(struct xfrm_state *x)
+void xfrm_set_type_offload(struct xfrm_state *x, bool try_load)
 {
 	const struct xfrm_type_offload *type = NULL;
 	struct xfrm_state_afinfo *afinfo;
-	bool try_load = true;
 
 retry:
 	afinfo = xfrm_state_get_afinfo(x->props.family);
@@ -607,6 +606,7 @@ static void ___xfrm_state_destroy(struct xfrm_state *x)
 	kfree(x->coaddr);
 	kfree(x->replay_esn);
 	kfree(x->preplay_esn);
+	xfrm_unset_type_offload(x);
 	if (x->type) {
 		x->type->destructor(x);
 		xfrm_put_type(x->type);
@@ -780,8 +780,6 @@ void xfrm_dev_state_free(struct xfrm_state *x)
 	struct xfrm_dev_offload *xso = &x->xso;
 	struct net_device *dev = READ_ONCE(xso->dev);
 
-	xfrm_unset_type_offload(x);
-
 	if (dev && dev->xfrmdev_ops) {
 		spin_lock_bh(&xfrm_state_dev_gc_lock);
 		if (!hlist_unhashed(&x->dev_gclist))

net/xfrm/xfrm_user.c

@@ -977,6 +977,7 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
 	/* override default values from above */
 	xfrm_update_ae_params(x, attrs, 0);
 
+	xfrm_set_type_offload(x, attrs[XFRMA_OFFLOAD_DEV]);
 	/* configure the hardware if offload is requested */
 	if (attrs[XFRMA_OFFLOAD_DEV]) {
 		err = xfrm_dev_state_add(net, x,