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alistair23-linux/sound/usb
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Takashi Iwai 2d994c9cef ALSA: line6: Fix endless MIDI read loop 
commit d683469b3c upstream.

The MIDI input event parser of the LINE6 driver may enter into an
endless loop when the unexpected data sequence is given, as it tries
to continue the secondary bytes without termination.  Also, when the
input data is too short, the parser returns a negative error, while
the caller doesn't handle it properly.  This would lead to the
unexpected behavior as well.

This patch addresses those issues by checking the return value
correctly and handling the one-byte event in the parser properly.

The bug was reported by syzkaller.

Reported-by: syzbot+cce32521ee0a824c21f7@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/000000000000033087059f8f8fa3@google.com
Link: https://lore.kernel.org/r/20200309095922.30269-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-03-25 08:25:51 +01:00
..
6fire treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
bcd2000 Linux 5.2-rc6 2019-06-26 12:39:34 +01:00
caiaq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hiface ALSA: hiface: fix multiple memory leak bugs 2019-08-07 12:20:00 +02:00
line6 ALSA: line6: Fix endless MIDI read loop 2020-03-25 08:25:51 +01:00
misc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 264 2019-06-05 17:30:28 +02:00
usx2y ALSA: usx2y: Adjust indentation in snd_usX2Y_hwdep_dsp_status 2020-02-24 08:36:37 +01:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile Merge branch 'topic/usb-validation' into for-next 2019-08-22 15:42:03 +02:00
card.c ALSA: usb-audio: unlock on error in probe 2020-02-24 08:36:50 +01:00
card.h ALSA: usb-audio: set the interface format after resume on Dell WD19 2020-01-09 10:19:55 +01:00
clock.c ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000 2020-02-19 19:52:57 +01:00
clock.h ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000 2020-02-19 19:52:57 +01:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
endpoint.c ALSA: usb-audio: not submit urb for stopped endpoint 2019-11-13 10:49:31 +01:00
endpoint.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
format.c ALSA: usb-audio: add quirks for Line6 Helix devices fw>=2.82 2020-02-24 08:36:58 +01:00
format.h ALSA: usb: initial USB Audio Device Class 3.0 support 2018-03-21 11:46:33 +01:00
helper.c ALSA: usb-audio: Fix gpf in snd_usb_pipe_sanity_check 2019-07-30 12:32:21 +02:00
helper.h ALSA: usb-audio: More validations of descriptor units 2019-08-22 10:35:59 +02:00
media.c media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
media.h media: sound/usb: Use Media Controller API to share media resources 2019-04-22 11:21:06 -04:00
midi.c ALSA: rawmidi: A lightweight function to discard pending bytes 2018-10-04 20:13:17 +02:00
midi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer.c ALSA: usb-audio: Fix UAC2/3 effect unit parsing 2020-02-19 19:52:56 +01:00
mixer.h ALSA: usb-audio: Scarlett Gen 2 mixer interface 2019-07-28 17:47:48 +02:00
mixer_maps.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mixer_quirks.c Merge branch 'topic/usb-validation' into for-next 2019-08-22 15:42:03 +02:00
mixer_quirks.h ALSA: usb-audio: Initialize Dell Dock playback volumes 2018-05-02 16:02:32 +02:00
mixer_scarlett.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mixer_scarlett.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mixer_scarlett_gen2.c ALSA: usb-audio: Annotate endianess in Scarlett gen2 quirk 2020-02-11 04:35:11 -08:00
mixer_scarlett_gen2.h ALSA: usb-audio: Scarlett Gen 2 mixer interface 2019-07-28 17:47:48 +02:00
mixer_us16x08.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
mixer_us16x08.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm.c ALSA: usb-audio: add implicit fb quirk for MOTU M Series 2020-02-24 08:36:50 +01:00
pcm.h ALSA: usb-audio: Add UAC3 Power Domains to suspend/resume 2018-07-31 15:01:36 +02:00
power.c ALSA: usb-audio: More validations of descriptor units 2019-08-22 10:35:59 +02:00
power.h ALSA: usb-audio: Initial Power Domain support 2018-07-31 15:01:22 +02:00
proc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
proc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quirks-table.h ALSA: usb-audio: set the interface format after resume on Dell WD19 2020-01-09 10:19:55 +01:00
quirks.c ALSA: usb-audio: Add boot quirk for MOTU M Series 2020-02-24 08:36:46 +01:00
quirks.h ALSA: usb-audio: Add boot quirk for MOTU M Series 2020-02-24 08:36:46 +01:00
stream.c Merge branch 'topic/usb-validation' into for-next 2019-08-22 15:42:03 +02:00
stream.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbaudio.h ALSA: usb-audio: set the interface format after resume on Dell WD19 2020-01-09 10:19:55 +01:00
validate.c ALSA: usb-audio: Fix endianess in descriptor validation 2020-02-11 04:35:10 -08:00