From 69eba10e606a80665f8573221fec589430d9d1cb Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 27 Nov 2014 01:34:43 +0300 Subject: [PATCH] ALSA: hda - using uninitialized data In olden times the snd_hda_param_read() function always set "*start_id" but in 2007 we introduced a new return and it causes uninitialized data bugs in a couple of the callers: print_codec_info() and hdmi_parse_codec(). Fixes: e8a7f136f5ed ('[ALSA] hda-intel - Improve HD-audio codec probing robustness') Signed-off-by: Dan Carpenter Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index b2d58998dbdd..2fe86d2e1b09 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -346,8 +346,10 @@ int snd_hda_get_sub_nodes(struct hda_codec *codec, hda_nid_t nid, unsigned int parm; parm = snd_hda_param_read(codec, nid, AC_PAR_NODE_COUNT); - if (parm == -1) + if (parm == -1) { + *start_id = 0; return 0; + } *start_id = (parm >> 16) & 0x7fff; return (int)(parm & 0x7fff); } -- 2.20.1