| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 39/77] ALSA: hda - using uninitialized data | Date | Tue, 13 Jan 2015 23:23:19 -0800 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter <dan.carpenter@oracle.com>
commit 69eba10e606a80665f8573221fec589430d9d1cb 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: e8a7f136f5ed ('[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>
--- sound/pci/hda/hda_codec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -338,8 +338,10 @@ int snd_hda_get_sub_nodes(struct hda_cod 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); }
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