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| author | Takashi Iwai <tiwai@suse.de> | 2023-05-23 09:53:44 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-05-23 12:11:19 +0200 |
| commit | 1359905383834ed5fc294fad3954d40dbcf770af (patch) | |
| tree | 90d01c15df0f8e98441b29733e3b4fce2fc22b11 /sound/core | |
| parent | ALSA: seq: Check validity before creating a port object (diff) | |
| download | linux-1359905383834ed5fc294fad3954d40dbcf770af.tar.xz linux-1359905383834ed5fc294fad3954d40dbcf770af.zip | |
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: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-24-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/seq/seq_clientmgr.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; |