ALSA: seq: Prohibit creating ports with special numbers

[linux-2.6-microblaze.git] / sound / core / seq / seq_clientmgr.c

diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 2dac8c3..0f26f20 100644 (file)
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -1206,6 +1206,8 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg)
                port_idx = info->addr.port;
        else
                port_idx = -1;
+       if (port_idx >= SNDRV_SEQ_ADDRESS_UNKNOWN)
+               return -EINVAL;
        err = snd_seq_create_port(client, port_idx, &port);
        if (err < 0)
                return err;