diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-10 09:17:48 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-10 09:17:48 -0800 |
commit | f0ebbe9b18e0d2bb79c7963faf847b949d4f5720 (patch) | |
tree | f42364499db9fb91256d7f3c8d6dbe6879b2cfc3 /sound/usb/mixer.c | |
parent | e7446be4468bb24c9e45a153bcc9f29ec0372a6f (diff) | |
parent | d1dd42110d2727e81b9265841a62bc84c454c3a2 (diff) |
Merge tag 'sound-5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes for USB-audio, HD-audio and cs46xx.
The USB-audio fixes are for out-of-bound accesses and a regression in
the recent cleanup, while HD-audio fixes are usual device-specific
quirks"
* tag 'sound-5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Disable headset Mic VREF for headset mode of ALC225
ALSA: hda/realtek - Add unplug function into unplug state of Headset Mode for ALC225
ALSA: usb-audio: fix CM6206 register definitions
ALSA: cs46xx: Potential NULL dereference in probe
ALSA: hda/realtek - Support Dell headset mode for New AIO platform
ALSA: usb-audio: Fix an out-of-bound read in create_composite_quirks
ALSA: usb-audio: Always check descriptor sizes in parser code
ALSA: usb-audio: Check mixer unit descriptors more strictly
ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
Diffstat (limited to 'sound/usb/mixer.c')
-rw-r--r-- | sound/usb/mixer.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index c63c84b54969..e7d441d0e839 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -753,8 +753,9 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, struct uac_mixer_unit_descriptor *desc) { int mu_channels; + void *c; - if (desc->bLength < 11) + if (desc->bLength < sizeof(*desc)) return -EINVAL; if (!desc->bNrInPins) return -EINVAL; @@ -763,6 +764,8 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, case UAC_VERSION_1: case UAC_VERSION_2: default: + if (desc->bLength < sizeof(*desc) + desc->bNrInPins + 1) + return 0; /* no bmControls -> skip */ mu_channels = uac_mixer_unit_bNrChannels(desc); break; case UAC_VERSION_3: @@ -772,7 +775,11 @@ static int uac_mixer_unit_get_channels(struct mixer_build *state, } if (!mu_channels) - return -EINVAL; + return 0; + + c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); + if (c - (void *)desc + (mu_channels - 1) / 8 >= desc->bLength) + return 0; /* no bmControls -> skip */ return mu_channels; } @@ -944,7 +951,7 @@ static int check_input_term(struct mixer_build *state, int id, struct uac_mixer_unit_descriptor *d = p1; err = uac_mixer_unit_get_channels(state, d); - if (err < 0) + if (err <= 0) return err; term->channels = err; @@ -2068,11 +2075,15 @@ static int parse_audio_input_terminal(struct mixer_build *state, int unitid, if (state->mixer->protocol == UAC_VERSION_2) { struct uac2_input_terminal_descriptor *d_v2 = raw_desc; + if (d_v2->bLength < sizeof(*d_v2)) + return -EINVAL; control = UAC2_TE_CONNECTOR; term_id = d_v2->bTerminalID; bmctls = le16_to_cpu(d_v2->bmControls); } else if (state->mixer->protocol == UAC_VERSION_3) { struct uac3_input_terminal_descriptor *d_v3 = raw_desc; + if (d_v3->bLength < sizeof(*d_v3)) + return -EINVAL; control = UAC3_TE_INSERTION; term_id = d_v3->bTerminalID; bmctls = le32_to_cpu(d_v3->bmControls); @@ -2118,7 +2129,7 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, if (err < 0) continue; /* no bmControls field (e.g. Maya44) -> ignore */ - if (desc->bLength <= 10 + input_pins) + if (!num_outs) continue; err = check_input_term(state, desc->baSourceID[pin], &iterm); if (err < 0) @@ -2314,7 +2325,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, char *name) { struct uac_processing_unit_descriptor *desc = raw_desc; - int num_ins = desc->bNrInPins; + int num_ins; struct usb_mixer_elem_info *cval; struct snd_kcontrol *kctl; int i, err, nameid, type, len; @@ -2329,7 +2340,13 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, 0, NULL, default_value_info }; - if (desc->bLength < 13 || desc->bLength < 13 + num_ins || + if (desc->bLength < 13) { + usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); + return -EINVAL; + } + + num_ins = desc->bNrInPins; + if (desc->bLength < 13 + num_ins || desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); return -EINVAL; |