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ALSA: hda - using uninitialized data

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commit 69eba10e60 upstream.

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: e8a7f136f5 ('[ALSA] hda-intel - Improve HD-audio codec probing robustness')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter
2014-11-27 01:34:43 +03:00
committed by Greg Kroah-Hartman
parent 5c27da8b27
commit a26f3d7af4
1 changed files with 3 additions and 1 deletions
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4
sound/pci/hda/hda_codec.c
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@@ -327,8 +327,10 @@ 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);
}