From 71aa5ebe36a4e936eff281b375a4707b6a8320f2 Mon Sep 17 00:00:00 2001 From: David Henningsson <david.henningsson@canonical.com> Date: Wed, 17 Oct 2012 12:43:44 +0200 Subject: [PATCH] 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> --- sound/pci/hda/patch_realtek.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 8253b4eeb6a1..48d9d609f89b 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -2598,8 +2598,10 @@ static const char *alc_get_line_out_pfx(struct alc_spec *spec, int ch, return "PCM"; break; } - if (snd_BUG_ON(ch >= ARRAY_SIZE(channel_name))) + if (ch >= ARRAY_SIZE(channel_name)) { + snd_BUG(); return "PCM"; + } return channel_name[ch]; } -- 2.20.1