net: ipv6: check return value of rhashtable_init

When rhashtable_init() fails, it returns -EINVAL.
However, since error return value of rhashtable_init is not checked,
it can cause use of uninitialized pointers.
So, fix unhandled errors of rhashtable_init.

Signed-off-by: MichelleJin <[e-mail]>
Reviewed-by: David Ahern <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv6/ila/ila_xlat.c

···
 	if (err)
 		return err;
 
-	rhashtable_init(&ilan->xlat.rhash_table, &rht_params);
+	err = rhashtable_init(&ilan->xlat.rhash_table, &rht_params);
+	if (err) {
+		free_bucket_spinlocks(ilan->xlat.locks);
+		return err;
+	}
 
 	return 0;
 }

net/ipv6/seg6.c

···
 	net->ipv6.seg6_data = sdata;
 
 #ifdef CONFIG_IPV6_SEG6_HMAC
-	seg6_hmac_net_init(net);
+	if (seg6_hmac_net_init(net)) {
+		kfree(sdata);
+		kfree(rcu_dereference_raw(sdata->tun_src));
+		return -ENOMEM;
+	};
 #endif
 
 	return 0;
···
 	seg6_hmac_net_exit(net);
 #endif
 
-	kfree(sdata->tun_src);
+	kfree(rcu_dereference_raw(sdata->tun_src));
 	kfree(sdata);
 }
 

net/ipv6/seg6_hmac.c

···
 {
 	struct seg6_pernet_data *sdata = seg6_pernet(net);
 
-	rhashtable_init(&sdata->hmac_infos, &rht_params);
-
-	return 0;
+	return rhashtable_init(&sdata->hmac_infos, &rht_params);
 }
 EXPORT_SYMBOL(seg6_hmac_net_init);