Messages in this thread Patch in this message | | | Date | Fri, 16 Dec 2011 12:49:35 -0800 | From | Greg KH <> | Subject | [02/16] ALSA: hda/realtek - Fix Oops in alc_mux_select() |
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2.6.32-longterm review patch. If anyone has any objections, please let me know.
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From: Takashi Iwai <tiwai@suse.de>
commit cce4aa378a049f4275416ee6302dd24f37b289df upstream.
When no imux is available (e.g. a single capture source), alc_auto_init_input_src() may trigger an Oops due to the access to -1. Add a proper zero-check to avoid it.
Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- sound/pci/hda/patch_realtek.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -432,6 +432,8 @@ static int alc_mux_enum_put(struct snd_k imux = &spec->input_mux[mux_idx]; if (!imux->num_items && mux_idx > 0) imux = &spec->input_mux[0]; + if (!imux->num_items) + return 0; type = get_wcaps_type(get_wcaps(codec, nid)); if (type == AC_WID_AUD_MIX) {
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