Some port numbers are special, such as 254 for subscribers and 255 for broadcast. Return error if application tries to create such a port.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/seq/seq_clientmgr.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 2dac8c3355fd..0f26f20596d7 100644 --- 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;