linux-stable.git/sound, branch v3.18.91

ASoC: twl4030: fix child-node lookup

2018-01-02T19:04:58+00:00

commit 15f8c5f2415bfac73f33a14bcd83422bcbfb5298 upstream.

Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.

To make things worse, the parent codec node was also prematurely freed,
while the child node was leaked.

Fixes: 2d6d649a2e0f ("ASoC: twl4030: Support for DT booted kernel")
Signed-off-by: Johan Hovold 
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Fix the missing ctl name suffix at parsing SU

2018-01-02T19:04:57+00:00

commit 5a15f289ee87eaf33f13f08a4909ec99d837ec5f upstream.

The commit 89b89d121ffc ("ALSA: usb-audio: Add check return value for
usb_string()") added the check of the return value from
snd_usb_copy_string_desc(), which is correct per se, but it introduced
a regression.  In the original code, either the "Clock Source",
"Playback Source" or "Capture Source" suffix is added after the
terminal string, while the commit changed it to add the suffix only
when get_term_name() is failing.  It ended up with an incorrect ctl
name like "PCM" instead of "PCM Capture Source".

Also, even the original code has a similar bug: when the ctl name is
generated from snd_usb_copy_string_desc() for the given iSelector, it
also doesn't put the suffix.

This patch addresses these issues: the suffix is added always when no
static mapping is found.  Also the patch tries to put more comments
and cleans up the if/else block for better readability in order to
avoid the same pitfall again.

Fixes: 89b89d121ffc ("ALSA: usb-audio: Add check return value for usb_string()")
Reported-and-tested-by: Mauro Santos 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: rawmidi: Avoid racy info ioctl via ctl device

2018-01-02T19:04:57+00:00

commit c1cfd9025cc394fd137a01159d74335c5ac978ce upstream.

The rawmidi also allows to obtaining the information via ioctl of ctl
API.  It means that user can issue an ioctl to the rawmidi device even
when it's being removed as long as the control device is present.
Although the code has some protection via the global register_mutex,
its range is limited to the search of the corresponding rawmidi
object, and the mutex is already unlocked at accessing the rawmidi
object.  This may lead to a use-after-free.

For avoiding it, this patch widens the application of register_mutex
to the whole snd_rawmidi_info_select() function.  We have another
mutex per rawmidi object, but this operation isn't very hot path, so
it shouldn't matter from the performance POV.

Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: hda - add support for docking station for HP 820 G2

2017-12-25T13:20:05+00:00

[ Upstream commit 04d5466a976b096364a39a63ac264c1b3a5f8fa1 ]

This tested patch adds missing initialization for Line-In/Out PINs for
the docking station for HP 820 G2.

Signed-off-by: Jaroslav Kysela 
Signed-off-by: Takashi Iwai 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Add check return value for usb_string()

2017-12-16T09:32:27+00:00

commit 89b89d121ffcf8d9546633b98ded9d18b8f75891 upstream.

snd_usb_copy_string_desc() returns zero if usb_string() fails.
In case of failure, we need to check the snd_usb_copy_string_desc()'s
return value and add an exception case

Signed-off-by: Jaejoong Kim 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Fix out-of-bound error

2017-12-16T09:32:27+00:00

commit 251552a2b0d454badc8f486e6d79100970c744b0 upstream.

The snd_usb_copy_string_desc() retrieves the usb string corresponding to
the index number through the usb_string(). The problem is that the
usb_string() returns the length of the string (>= 0) when successful, but
it can also return a negative value about the error case or status of
usb_control_msg().

If iClockSource is '0' as shown below, usb_string() will returns -EINVAL.
This will result in '0' being inserted into buf[-22], and the following
KASAN out-of-bound error message will be output.

AudioControl Interface Descriptor:
  bLength                 8
  bDescriptorType        36
  bDescriptorSubtype     10 (CLOCK_SOURCE)
  bClockID                1
  bmAttributes         0x07 Internal programmable Clock (synced to SOF)
  bmControls           0x07
  Clock Frequency Control (read/write)
  Clock Validity Control (read-only)
  bAssocTerminal          0
  iClockSource            0

To fix it, check usb_string()'return value and bail out.

==================================================================
BUG: KASAN: stack-out-of-bounds in parse_audio_unit+0x1327/0x1960 [snd_usb_audio]
Write of size 1 at addr ffff88007e66735a by task systemd-udevd/18376

CPU: 0 PID: 18376 Comm: systemd-udevd Not tainted 4.13.0+ #3
Hardware name: LG Electronics                   15N540-RFLGL/White Tip Mountain, BIOS 15N5
Call Trace:
dump_stack+0x63/0x8d
print_address_description+0x70/0x290
? parse_audio_unit+0x1327/0x1960 [snd_usb_audio]
kasan_report+0x265/0x350
__asan_store1+0x4a/0x50
parse_audio_unit+0x1327/0x1960 [snd_usb_audio]
? save_stack+0xb5/0xd0
? save_stack_trace+0x1b/0x20
? save_stack+0x46/0xd0
? kasan_kmalloc+0xad/0xe0
? kmem_cache_alloc_trace+0xff/0x230
? snd_usb_create_mixer+0xb0/0x4b0 [snd_usb_audio]
? usb_audio_probe+0x4de/0xf40 [snd_usb_audio]
? usb_probe_interface+0x1f5/0x440
? driver_probe_device+0x3ed/0x660
? build_feature_ctl+0xb10/0xb10 [snd_usb_audio]
? save_stack_trace+0x1b/0x20
? init_object+0x69/0xa0
? snd_usb_find_csint_desc+0xa8/0xf0 [snd_usb_audio]
snd_usb_mixer_controls+0x1dc/0x370 [snd_usb_audio]
? build_audio_procunit+0x890/0x890 [snd_usb_audio]
? snd_usb_create_mixer+0xb0/0x4b0 [snd_usb_audio]
? kmem_cache_alloc_trace+0xff/0x230
? usb_ifnum_to_if+0xbd/0xf0
snd_usb_create_mixer+0x25b/0x4b0 [snd_usb_audio]
? snd_usb_create_stream+0x255/0x2c0 [snd_usb_audio]
usb_audio_probe+0x4de/0xf40 [snd_usb_audio]
? snd_usb_autosuspend.part.7+0x30/0x30 [snd_usb_audio]
? __pm_runtime_idle+0x90/0x90
? kernfs_activate+0xa6/0xc0
? usb_match_one_id_intf+0xdc/0x130
? __pm_runtime_set_status+0x2d4/0x450
usb_probe_interface+0x1f5/0x440

Signed-off-by: Jaejoong Kim 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: seq: Remove spurious WARN_ON() at timer check

2017-12-16T09:32:27+00:00

commit 43a3542870328601be02fcc9d27b09db467336ef upstream.

The use of snd_BUG_ON() in ALSA sequencer timer may lead to a spurious
WARN_ON() when a slave timer is deployed as its backend and a
corresponding master timer stops meanwhile.  The symptom was triggered
by syzkaller spontaneously.

Since the NULL timer is valid there, rip off snd_BUG_ON().

Reported-by: syzbot 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: pcm: prevent UAF in snd_pcm_info

2017-12-16T09:32:27+00:00

commit 362bca57f5d78220f8b5907b875961af9436e229 upstream.

When the device descriptor is closed, the `substream->runtime` pointer
is freed. But another thread may be in the ioctl handler, case
SNDRV_CTL_IOCTL_PCM_INFO. This case calls snd_pcm_info_user() which
calls snd_pcm_info() which accesses the now freed `substream->runtime`.

Note: this fixes CVE-2017-0861

Signed-off-by: Robb Glasser 
Signed-off-by: Nick Desaulniers 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ASoC: wm_adsp: Don't overrun firmware file buffer when reading region data

2017-11-30T08:35:55+00:00

[ Upstream commit 1cab2a84f470e15ecc8e5143bfe9398c6e888032 ]

Protect against corrupt firmware files by ensuring that the length we
get for the data in a region actually lies within the available firmware
file data buffer.

Signed-off-by: Richard Fitzgerald 
Signed-off-by: Mark Brown 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ALSA: hda - Apply ALC269_FIXUP_NO_SHUTUP on HDA_FIXUP_ACT_PROBE

2017-11-30T08:35:55+00:00

[ Upstream commit 972aa2c708703c21f14eb958b37e82aae2530e44 ]

Setting shutup when the action is HDA_FIXUP_ACT_PRE_PROBE might
not have the desired effect since it could be overridden by
another more generic shutup function. Prevent this by setting
the more specific shutup function on HDA_FIXUP_ACT_PROBE.

Signed-off-by: Gabriele Mazzotta 
Signed-off-by: Takashi Iwai 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman