netfilter: x_tables: refactor deprecated strncpy

Prefer `strscpy_pad` to `strncpy`.
Signed-off-by: Justin Stitt <justinstitt@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

net/netfilter/x_tables.c

@@ -768,7 +768,7 @@ void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
 	m->u.user.match_size = msize;
 	strscpy(name, match->name, sizeof(name));
 	module_put(match->me);
-	strncpy(m->u.user.name, name, sizeof(m->u.user.name));
+	strscpy_pad(m->u.user.name, name, sizeof(m->u.user.name));
 
 	*size += off;
 	*dstptr += msize;
@@ -1148,7 +1148,7 @@ void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr,
 	t->u.user.target_size = tsize;
 	strscpy(name, target->name, sizeof(name));
 	module_put(target->me);
-	strncpy(t->u.user.name, name, sizeof(t->u.user.name));
+	strscpy_pad(t->u.user.name, name, sizeof(t->u.user.name));
 
 	*size += off;
 	*dstptr += tsize;
@@ -2014,4 +2014,3 @@ static void __exit xt_fini(void)
 
 module_init(xt_init);
 module_exit(xt_fini);
-