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7682e39948
linux/sound/usb
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Takashi Iwai 7682e39948 ALSA: usx2y: Suppress kernel warning at page allocation failures 
The usx2y driver allocates the stream read/write buffers in continuous
pages depending on the stream setup, and this may spew the kernel
warning messages with a stack trace like:
  WARNING: CPU: 1 PID: 1846 at mm/page_alloc.c:3883
  __alloc_pages_slowpath+0x1ef2/0x2d70
  Modules linked in:
  CPU: 1 PID: 1846 Comm: kworker/1:2 Not tainted
  ....

It may confuse user as if it were any serious error, although this is
no fatal error and the driver handles the error case gracefully.
Since the driver has already some sanity check of the given size (128
and 256 pages), it can't pass any crazy value.  So it's merely page
fragmentation.

This patch adds __GFP_NOWARN to each caller for suppressing such
kernel warnings.  The original issue was spotted by syzkaller.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-10-02 18:10:47 +02:00
..
6fire ALSA: 6fire: Use common error handling code in usb6fire_chip_probe() 2017-09-07 10:29:35 +02:00
bcd2000 ALSA: bcd2000: constify usb_device_id. 2017-08-06 22:20:08 +02:00
caiaq ALSA: usb: constify snd_pcm_ops structures 2017-08-19 11:02:27 +02:00
hiface ALSA: usb: constify snd_pcm_ops structures 2017-08-19 11:02:27 +02:00
line6 ALSA: line6: remove unnecessary initialization to PODHD500X 2017-06-20 07:51:22 +02:00
misc ALSA: usb: constify snd_pcm_ops structures 2017-08-19 11:02:27 +02:00
usx2y ALSA: usx2y: Suppress kernel warning at page allocation failures 2017-10-02 18:10:47 +02:00
card.c ALSA: usb-audio: Check out-of-bounds access by corrupted buffer descriptor 2017-09-22 16:21:31 +02:00
card.h ALSA: usb: use TEAC UD-H01 quirk for more devices 2016-08-22 11:39:56 +02:00
clock.c ALSA: usb-audio: Limit retrying sample rate reads 2016-04-29 11:49:04 +02:00
clock.h ALSA: usb-audio: UAC2: do clock validity check earlier 2013-04-04 08:30:59 +02:00
debug.h ALSA: usb-audio: make hwc_debug a noop in case HW_CONST_DEBUG is not set 2011-05-18 11:44:35 +02:00
endpoint.c ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion 2017-01-05 07:35:17 +01:00
endpoint.h ALSA: usb-audio: Fix irq/process data synchronization 2017-01-05 07:35:00 +01:00
format.c ALSA: usb-audio: rmove print for failure of kmalloc 2016-08-22 11:41:02 +02:00
format.h ALSA: usb-audio: store protocol version in struct audioformat 2013-06-27 21:59:47 +02:00
helper.c ALSA: usb-audio: correct speed checking 2016-05-08 11:42:04 +02:00
helper.h ALSA: usb-audio: increase control transfer timeout 2011-09-27 09:21:48 +02:00
Kconfig ALSA: us122l: enable compile testing 2017-05-15 11:02:14 +02:00
Makefile ALSA: usb-audio: Tascam US-16x08 DSP mixer quirk 2017-02-20 10:59:54 +01:00
midi.c ALSA: usb-audio: Put missing KERN_CONT prefix 2017-08-31 11:02:13 +02:00
midi.h ALSA: usb-audio: Refer to chip->usb_id for quirks and MIDI creation 2016-01-29 07:36:10 +01:00
mixer_maps.c ALSA: usb-audio: Change structure initialisation to C99 style 2016-06-17 16:58:41 +02:00
mixer_quirks.c ALSA: usb-audio: Add mute TLV for playback volumes on C-Media devices 2017-08-17 17:52:16 +02:00
mixer_quirks.h ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly 2015-12-14 10:13:17 +01:00
mixer_scarlett.c ALSA: usb-audio: constify snd_kcontrol_new structures 2017-02-21 22:02:03 +01:00
mixer_scarlett.h ALSA: usb-audio: Scarlett mixer interface for 6i6, 18i6, 18i8 and 18i20 2014-11-13 07:32:39 +01:00
mixer_us16x08.c ALSA: usb: Avoid VLA in mixer_us16x08.c 2017-05-31 08:46:19 +02:00
mixer_us16x08.h ALSA: usb-audio: Fix memory leak and corruption in mixer_us16x08.c 2017-02-22 14:24:09 +01:00
mixer.c Merge branch 'for-linus' into for-next 2017-08-22 15:44:45 +02:00
mixer.h ALSA: usb-audio: Add mute TLV for playback volumes on C-Media devices 2017-08-17 17:52:16 +02:00
pcm.c ALSA: usb: constify snd_pcm_ops structures 2017-08-19 11:02:27 +02:00
pcm.h ALSA: usb: refine delay information with USB frame counter 2011-09-12 10:30:20 +02:00
power.h ALSA: usbaudio: implement USB autosuspend 2011-03-11 14:59:29 +01:00
proc.c ALSA: usb-audio: Avoid nested autoresume calls 2015-08-26 15:38:25 +02:00
proc.h ALSA: usb-audio: refactor code 2010-03-05 08:17:14 +01:00
quirks-table.h ALSA: usb-audio: Add quirk for Syntek STK1160 2016-10-27 12:07:19 +02:00
quirks.c ALSA: usb-audio: Add sample rate quirk for Plantronics C310/C520-M 2017-09-20 22:14:40 +02:00
quirks.h ALSA: usb-audio: Refer to chip->usb_id for quirks and MIDI creation 2016-01-29 07:36:10 +01:00
stream.c ALSA: usb: Delete an error message for a failed memory allocation in two functions 2017-08-12 23:20:55 +02:00
stream.h ALSA: snd-usb: re-order code 2011-09-14 17:07:02 +02:00
usbaudio.h Merge branch 'for-linus' into for-next 2016-05-10 16:06:04 +02:00