sctp: fix memleak in sctp_send_reset_streams

If the stream outq is not empty, need to kfree nstr_list.

Fixes: d570a59c5b5f ("sctp: only allow the out stream reset when the stream outq is empty")
Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: zhengbin <[e-mail]>
Acked-by: Marcelo Ricardo Leitner <[e-mail]>
Acked-by: Neil Horman <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

net/sctp/stream.c

···
 		nstr_list[i] = htons(str_list[i]);
 
 	if (out && !sctp_stream_outq_is_empty(stream, str_nums, nstr_list)) {
+		kfree(nstr_list);
 		retval = -EAGAIN;
 		goto out;
 	}