allowedips: initialize list head in selftest

The randomized trie tests weren't initializing the dummy peer list head,
resulting in a NULL pointer dereference when used. Fix this by
initializing it in the randomized trie test, just like we do for the
static unit test.

While we're at it, all of the other strings like this have the word
"self-test", so add it to the missing place here.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Change-Id: Id977cc2536b8b6e20ddcbd3f0bf723a1491adf53
(cherry picked from commit c20ed0b4bbc976b90cb3b0bf2ca3f3b4ff88df71)
Signed-off-by: TogoFire <togofire@mailfence.com>

drivers/net/wireguard/selftest/allowedips.c

@@ -296,6 +296,7 @@ static __init bool randomized_test(void)
 			goto free;
 		}
 		kref_init(&peers[i]->refcount);
+		INIT_LIST_HEAD(&peers[i]->allowedips_list);
 	}
 
 	mutex_lock(&mutex);
@@ -333,7 +334,7 @@ static __init bool randomized_test(void)
 			if (wg_allowedips_insert_v4(&t,
 						    (struct in_addr *)mutated,
 						    cidr, peer, &mutex) < 0) {
-				pr_err("allowedips random malloc: FAIL\n");
+				pr_err("allowedips random self-test malloc: FAIL\n");
 				goto free_locked;
 			}
 			if (horrible_allowedips_insert_v4(&h,