[alsa-devel] [PATCH 1/2] ALSA: hda - Fix the max length of control name in generic parser
add_control_with_pfx() in hda_generic.c assumes a shorter name string for the control element, and this resulted in the truncation of the long but valid string like "Headphone Surround Switch" in the middle.
This patch aligns the max size to the actual limit of snd_ctl_elem_id, 44.
Cc: stable@vger.kernel.org [v3.9+] Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/pci/hda/hda_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c index 1485d87..6460fc5 100644 --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -854,7 +854,7 @@ static int add_control_with_pfx(struct hda_gen_spec *spec, int type, const char *pfx, const char *dir, const char *sfx, int cidx, unsigned long val) { - char name[32]; + char name[44]; snprintf(name, sizeof(name), "%s %s %s", pfx, dir, sfx); if (!add_control(spec, type, name, cidx, val)) return -ENOMEM;
The char arrays with size 44 are for the name string of snd_ctl_elem_id. Define the constant and replace the raw numbers with it for clarifying better.
Signed-off-by: Takashi Iwai tiwai@suse.de --- include/uapi/sound/asound.h | 2 ++ sound/pci/ac97/ac97_codec.c | 2 +- sound/pci/asihpi/asihpi.c | 2 +- sound/pci/hda/hda_generic.c | 12 ++++++------ sound/pci/hda/hda_jack.c | 2 +- sound/pci/hda/patch_ca0132.c | 8 ++++---- 6 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index e3983d5..041203f 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -817,6 +817,8 @@ typedef int __bitwise snd_ctl_elem_iface_t; #define SNDRV_CTL_POWER_D3hot (SNDRV_CTL_POWER_D3|0x0000) /* Off, with power */ #define SNDRV_CTL_POWER_D3cold (SNDRV_CTL_POWER_D3|0x0001) /* Off, without power */
+#define SNDRV_CTL_ELEM_ID_NAME_MAXLEN 44 + struct snd_ctl_elem_id { unsigned int numid; /* numeric identifier, zero = invalid */ snd_ctl_elem_iface_t iface; /* interface identifier */ diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c index d37c683..445ca48 100644 --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -1296,7 +1296,7 @@ static int snd_ac97_cmix_new_stereo(struct snd_card *card, const char *pfx, struct snd_ac97 *ac97) { int err; - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; unsigned char lo_max, hi_max;
if (! snd_ac97_valid_reg(ac97, reg)) diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c index fbc1720..185d54a 100644 --- a/sound/pci/asihpi/asihpi.c +++ b/sound/pci/asihpi/asihpi.c @@ -1278,7 +1278,7 @@ struct hpi_control { u16 dst_node_type; u16 dst_node_index; u16 band; - char name[44]; /* copied to snd_ctl_elem_id.name[44]; */ + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; /* copied to snd_ctl_elem_id.name[44]; */ };
static const char * const asihpi_tuner_band_names[] = { diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c index 6460fc5..8e77cbb 100644 --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -854,7 +854,7 @@ static int add_control_with_pfx(struct hda_gen_spec *spec, int type, const char *pfx, const char *dir, const char *sfx, int cidx, unsigned long val) { - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; snprintf(name, sizeof(name), "%s %s %s", pfx, dir, sfx); if (!add_control(spec, type, name, cidx, val)) return -ENOMEM; @@ -1931,7 +1931,7 @@ static int create_extra_outs(struct hda_codec *codec, int num_pins,
for (i = 0; i < num_pins; i++) { const char *name; - char tmp[44]; + char tmp[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; int err, idx = 0;
if (num_pins == 2 && i == 1 && !strcmp(pfx, "Speaker")) @@ -2484,7 +2484,7 @@ static int create_out_jack_modes(struct hda_codec *codec, int num_pins, } if (get_out_jack_num_items(codec, pin) > 1) { struct snd_kcontrol_new *knew; - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; get_jack_mode_name(codec, pin, name, sizeof(name)); knew = snd_hda_gen_add_kctl(spec, name, &out_jack_mode_enum); @@ -2616,7 +2616,7 @@ static int create_in_jack_mode(struct hda_codec *codec, hda_nid_t pin) { struct hda_gen_spec *spec = codec->spec; struct snd_kcontrol_new *knew; - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; unsigned int defcfg;
if (pin == spec->hp_mic_pin) @@ -3316,7 +3316,7 @@ static int add_single_cap_ctl(struct hda_codec *codec, const char *label, bool inv_dmic) { struct hda_gen_spec *spec = codec->spec; - char tmpname[44]; + char tmpname[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; int type = is_switch ? HDA_CTL_WIDGET_MUTE : HDA_CTL_WIDGET_VOL; const char *sfx = is_switch ? "Switch" : "Volume"; unsigned int chs = inv_dmic ? 1 : 3; @@ -3578,7 +3578,7 @@ static int parse_mic_boost(struct hda_codec *codec) struct nid_path *path; unsigned int val; int idx; - char boost_label[44]; + char boost_label[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
idx = imux->items[i].index; if (idx >= imux->num_items) diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c index 9e0a952..3fd2973 100644 --- a/sound/pci/hda/hda_jack.c +++ b/sound/pci/hda/hda_jack.c @@ -398,7 +398,7 @@ static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid, const char *base_name) { unsigned int def_conf, conn; - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; int idx, err; bool phantom_jack;
diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c index 90ff7a3..6e9876f 100644 --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -139,7 +139,7 @@ enum { #define DSP_SPEAKER_OUT_LATENCY 7
struct ct_effect { - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; hda_nid_t nid; int mid; /*effect module ID*/ int reqs[EFFECT_VALS_MAX_COUNT]; /*effect module request*/ @@ -270,7 +270,7 @@ enum { };
struct ct_tuning_ctl { - char name[44]; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; hda_nid_t parent_nid; hda_nid_t nid; int mid; /*effect module ID*/ @@ -3103,7 +3103,7 @@ static int add_tuning_control(struct hda_codec *codec, hda_nid_t pnid, hda_nid_t nid, const char *name, int dir) { - char namestr[44]; + char namestr[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; int type = dir ? HDA_INPUT : HDA_OUTPUT; struct snd_kcontrol_new knew = HDA_CODEC_VOLUME_MONO(namestr, nid, 1, 0, type); @@ -3935,7 +3935,7 @@ static int ca0132_volume_tlv(struct snd_kcontrol *kcontrol, int op_flag, static int add_fx_switch(struct hda_codec *codec, hda_nid_t nid, const char *pfx, int dir) { - char namestr[44]; + char namestr[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; int type = dir ? HDA_INPUT : HDA_OUTPUT; struct snd_kcontrol_new knew = CA0132_CODEC_MUTE_MONO(namestr, nid, 1, type);
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Takashi Iwai