ALSA: hda - check NULL pointer when creating SPDIF controls

If the SPDIF control array cannot be reallocated, the function
will return to avoid dereferencing a NULL pointer.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 04b57383e8cb..3dc656688c08 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3334,6 +3334,8 @@ int snd_hda_create_dig_out_ctls(struct hda_codec *codec,
                 return -EBUSY;
         }
         spdif = snd_array_new(&codec->spdif_out);
+        if (!spdif)
+                return -ENOMEM;
         for (dig_mix = dig_mixes; dig_mix->name; dig_mix++) {
                 kctl = snd_ctl_new1(dig_mix, codec);
                 if (!kctl)