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(parent: 83f470e) | patch
ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
authorTakashi Iwai <tiwai@suse.de>
Wed, 19 Dec 2018 11:36:27 +0000 (12:36 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 13 Jan 2019 09:05:32 +0000 (10:05 +0100)
commita5e09a908ea3c64bf522822b7923d2d8fc1a7af2
tree77c0dd01381335cce8d5680ad6a62a7943cf57fatree | snapshot
parent83f470ebd75e3fbe56e177763337dc9326af02a4commit | diff
ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()

commit f4351a199cc120ff9d59e06d02e8657d08e6cc46 upstream.

The parser for the processing unit reads bNrInPins field before the
bLength sanity check, which may lead to an out-of-bound access when a
malformed descriptor is given.  Fix it by assignment after the bLength
check.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sound/usb/mixer.c diff | blob | history
wrapfs-4.14.y