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(parent: 89c7ba9) | 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 09:01:05 +0000 (10:01 +0100)
commit1117b7a380f4b4f575d90a318a43d2e168c01fbd
tree0e4f49b7bcacdf9ec7eae593f96486bdb10688aftree | snapshot
parent89c7ba90185dc9af684a17027300899e189039cdcommit | 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
Domain: System / Kernel;