ALSA: hda - Fix possible races of accesses to connection list array
Like the previous fixes for cache hash accesses, a protection over
accesses to the widget connection list array must be provided.
Together with this action, remove snd_hda_get_conn_list() which can be
always race, and replace it with either snd_hda_get_num_conns() or
snd_hda_get_connections() calls.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 152f458..0d68bb0 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -349,7 +349,7 @@
nid = get_capsrc(spec, adc_idx);
/* no selection? */
- num_conns = snd_hda_get_conn_list(codec, nid, NULL);
+ num_conns = snd_hda_get_num_conns(codec, nid);
if (num_conns <= 1)
return 1;
@@ -2543,7 +2543,6 @@
nid = codec->start_nid;
for (i = 0; i < codec->num_nodes; i++, nid++) {
hda_nid_t src;
- const hda_nid_t *list;
unsigned int caps = get_wcaps(codec, nid);
int type = get_wcaps_type(caps);
@@ -2554,6 +2553,7 @@
src = nid;
for (;;) {
int n;
+ hda_nid_t conn_nid;
type = get_wcaps_type(get_wcaps(codec, src));
if (type == AC_WID_PIN)
break;
@@ -2561,13 +2561,14 @@
cap_nids[nums] = src;
break;
}
- n = snd_hda_get_conn_list(codec, src, &list);
+ n = snd_hda_get_num_conns(codec, src);
if (n > 1) {
cap_nids[nums] = src;
break;
} else if (n != 1)
break;
- src = *list;
+ if (snd_hda_get_connections(codec, src, &src, 1) != 1)
+ break;
}
if (++nums >= max_nums)
break;
@@ -2708,7 +2709,7 @@
/* mute all loopback inputs */
if (spec->mixer_nid) {
- int nums = snd_hda_get_conn_list(codec, spec->mixer_nid, NULL);
+ int nums = snd_hda_get_num_conns(codec, spec->mixer_nid);
for (i = 0; i < nums; i++)
snd_hda_codec_write(codec, spec->mixer_nid, 0,
AC_VERB_SET_AMP_GAIN_MUTE,
@@ -3338,7 +3339,7 @@
if (wid_type == AC_WID_PIN || wid_type == AC_WID_AUD_OUT) {
type = ALC_CTL_WIDGET_MUTE;
val = HDA_COMPOSE_AMP_VAL(nid, chs, 0, HDA_OUTPUT);
- } else if (snd_hda_get_conn_list(codec, nid, NULL) == 1) {
+ } else if (snd_hda_get_num_conns(codec, nid) == 1) {
type = ALC_CTL_WIDGET_MUTE;
val = HDA_COMPOSE_AMP_VAL(nid, chs, 0, HDA_INPUT);
} else {
@@ -3898,7 +3899,7 @@
nums = 0;
for (n = 0; n < spec->num_adc_nids; n++) {
hda_nid_t cap = spec->private_capsrc_nids[n];
- int num_conns = snd_hda_get_conn_list(codec, cap, NULL);
+ int num_conns = snd_hda_get_num_conns(codec, cap);
for (i = 0; i < imux->num_items; i++) {
hda_nid_t pin = spec->imux_pins[i];
if (pin) {
@@ -4027,7 +4028,7 @@
if (get_wcaps_type(get_wcaps(codec, cap)) == AC_WID_AUD_MIX) {
snd_hda_codec_amp_stereo(codec, cap, HDA_INPUT, idx,
HDA_AMP_MUTE, 0);
- } else if (snd_hda_get_conn_list(codec, cap, NULL) > 1) {
+ } else if (snd_hda_get_num_conns(codec, cap) > 1) {
snd_hda_codec_write_cache(codec, cap, 0,
AC_VERB_SET_CONNECT_SEL, idx);
}