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ALSA: emux: fix validation of snd_emux.num_ports

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Both bounds had off-by-one errors.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Message-ID: <20240406064830.1029573-4-oswald.buddenhagen@gmx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Oswald Buddenhagen 2024-04-06 08:48:16 +02:00 committed by Takashi Iwai
parent 3f3e0dfc83
commit 19061f35b3
1 changed files with 3 additions and 3 deletions
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6
sound/synth/emux/emux_seq.c
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@ -65,11 +65,11 @@ snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
return -ENODEV;
}
if (emu->num_ports < 0) {
if (emu->num_ports <= 0) {
snd_printk(KERN_WARNING "seqports must be greater than zero\n");
emu->num_ports = 1;
} else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
snd_printk(KERN_WARNING "too many ports."
} else if (emu->num_ports > SNDRV_EMUX_MAX_PORTS) {
snd_printk(KERN_WARNING "too many ports. "
"limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
emu->num_ports = SNDRV_EMUX_MAX_PORTS;
}