ALSA: hda - Always check array bounds in alc_get_line_out_pfx
Even when CONFIG_SND_DEBUG is not enabled, we don't want to return an arbitrary memory location when the channel count is larger than we expected. Cc: stable@kernel.org Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -2598,8 +2598,10 @@ static const char *alc_get_line_out_pfx(struct alc_spec *spec, int ch,
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return "PCM";
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break;
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}
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if (snd_BUG_ON(ch >= ARRAY_SIZE(channel_name)))
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if (ch >= ARRAY_SIZE(channel_name)) {
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snd_BUG();
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return "PCM";
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}
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return channel_name[ch];
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}
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