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sound fixes for 4.15-rc3

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All fixes are small and for stable:
 - A PCM ioctl race fix
 - Yet another USB-audio hardening for malicious descriptors
 - Realtek ALC257 codec support
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Merge tag 'sound-4.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "All fixes are small and for stable:

   - a PCM ioctl race fix

   - yet another USB-audio hardening for malicious descriptors

   - Realtek ALC257 codec support"

* tag 'sound-4.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: pcm: prevent UAF in snd_pcm_info
  ALSA: hda/realtek - New codec support for ALC257
  ALSA: usb-audio: Add check return value for usb_string()
  ALSA: usb-audio: Fix out-of-bound error
  ALSA: seq: Remove spurious WARN_ON() at timer check
This commit is contained in:
Linus Torvalds 2017-12-06 10:49:14 -08:00
commit f9efc94447
4 changed files with 20 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/core/pcm.c
View File

@ -153,7 +153,9 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
err = -ENXIO;
goto _error;
}
mutex_lock(&pcm->open_mutex);
err = snd_pcm_info_user(substream, info);
mutex_unlock(&pcm->open_mutex);
_error:
mutex_unlock(&register_mutex);
return err;

2
sound/core/seq/seq_timer.c
View File

@ -355,7 +355,7 @@ static int initialize_timer(struct snd_seq_timer *tmr)
unsigned long freq;
t = tmr->timeri->timer;
if (snd_BUG_ON(!t))
if (!t)
return -EINVAL;
freq = tmr->preferred_resolution;

8
sound/pci/hda/patch_realtek.c
View File

@ -330,6 +330,7 @@ static void alc_fill_eapd_coef(struct hda_codec *codec)
case 0x10ec0236:
case 0x10ec0255:
case 0x10ec0256:
case 0x10ec0257:
case 0x10ec0282:
case 0x10ec0283:
case 0x10ec0286:
@ -2772,6 +2773,7 @@ enum {
ALC269_TYPE_ALC298,
ALC269_TYPE_ALC255,
ALC269_TYPE_ALC256,
ALC269_TYPE_ALC257,
ALC269_TYPE_ALC215,
ALC269_TYPE_ALC225,
ALC269_TYPE_ALC294,
@ -2805,6 +2807,7 @@ static int alc269_parse_auto_config(struct hda_codec *codec)
case ALC269_TYPE_ALC298:
case ALC269_TYPE_ALC255:
case ALC269_TYPE_ALC256:
case ALC269_TYPE_ALC257:
case ALC269_TYPE_ALC215:
case ALC269_TYPE_ALC225:
case ALC269_TYPE_ALC294:
@ -6867,6 +6870,10 @@ static int patch_alc269(struct hda_codec *codec)
spec->gen.mixer_nid = 0; /* ALC256 does not have any loopback mixer path */
alc_update_coef_idx(codec, 0x36, 1 << 13, 1 << 5); /* Switch pcbeep path to Line in path*/
break;
case 0x10ec0257:
spec->codec_variant = ALC269_TYPE_ALC257;
spec->gen.mixer_nid = 0;
break;
case 0x10ec0215:
case 0x10ec0285:
case 0x10ec0289:
@ -7914,6 +7921,7 @@ static const struct hda_device_id snd_hda_id_realtek[] = {
HDA_CODEC_ENTRY(0x10ec0236, "ALC236", patch_alc269),
HDA_CODEC_ENTRY(0x10ec0255, "ALC255", patch_alc269),
HDA_CODEC_ENTRY(0x10ec0256, "ALC256", patch_alc269),
HDA_CODEC_ENTRY(0x10ec0257, "ALC257", patch_alc269),
HDA_CODEC_ENTRY(0x10ec0260, "ALC260", patch_alc260),
HDA_CODEC_ENTRY(0x10ec0262, "ALC262", patch_alc262),
HDA_CODEC_ENTRY(0x10ec0267, "ALC267", patch_alc268),

13
sound/usb/mixer.c
View File

@ -204,6 +204,10 @@ static int snd_usb_copy_string_desc(struct mixer_build *state,
int index, char *buf, int maxlen)
{
int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
if (len < 0)
return 0;
buf[len] = 0;
return len;
}
@ -2174,13 +2178,14 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
if (len)
;
else if (nameid)
snd_usb_copy_string_desc(state, nameid, kctl->id.name,
len = snd_usb_copy_string_desc(state, nameid, kctl->id.name,
sizeof(kctl->id.name));
else {
else
len = get_term_name(state, &state->oterm,
kctl->id.name, sizeof(kctl->id.name), 0);
if (!len)
strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
if (!len) {
strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
append_ctl_name(kctl, " Clock Source");