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(parent: e5fab13) | patch
ALSA: usb-audio: Fix potential out-of-bounds shift
authorTakashi Iwai <tiwai@suse.de>
Wed, 9 Dec 2020 08:45:51 +0000 (09:45 +0100)
committerTakashi Iwai <tiwai@suse.de>
Mon, 14 Dec 2020 08:10:25 +0000 (09:10 +0100)
commit43d5ca88dfcd35e43010fdd818e067aa9a55f5ba
tree8525fc0223f857d2c48057c2b066784b0a224fcftree | snapshot
parente5fab13a7c54b8e69ea3bb27067eb06aba5f19b5commit | diff
ALSA: usb-audio: Fix potential out-of-bounds shift

syzbot spotted a potential out-of-bounds shift in the USB-audio format
parser that receives the arbitrary shift value from the USB
descriptor.

Add a range check for avoiding the undefined behavior.

Reported-by: syzbot+df7dc146ebdd6435eea3@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201209084552.17109-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/format.c diff | blob | history
Domain: System / Kernel;