Commit 13599053 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: seq: Prohibit creating ports with special numbers 



Some port numbers are special, such as 254 for subscribers and 255 for
broadcast.  Return error if application tries to create such a port.

Reviewed-by: default avatarJaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-24-tiwai@suse.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 4f92eb79

sound/core/seq/seq_clientmgr.c

+2 −0
Original line number Diff line number Diff line
@@ -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;