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ALSA: emux: Avoid potential array out-of-bound in snd_emux_xg_control()

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snd_emux_xg_control() can be called with an argument 'param' greater
than size of 'control' array. It may lead to accessing 'control'
array at a wrong index.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Artemii Karasev <karasev@ispras.ru>
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20230207132026.2870-1-karasev@ispras.ru
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Artemii Karasev 2023-02-07 18:20:26 +05:00 • committed by Takashi Iwai
parent 6c4715aa5b
commit 6a32425f95
1 changed files with 3 additions and 0 deletions
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3
sound/synth/emux/emux_nrpn.c
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@ -349,6 +349,9 @@ int
snd_emux_xg_control(struct snd_emux_port *port, struct snd_midi_channel *chan,
int param)
{
if (param >= ARRAY_SIZE(chan->control))
return -EINVAL;
return send_converted_effect(xg_effects, ARRAY_SIZE(xg_effects),
port, chan, param,
chan->control[param],