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USB: check usb_get_extra_descriptor for proper size
authorMathias Payer <mathias.payer@nebelwelt.net>
Wed, 5 Dec 2018 20:19:59 +0000 (21:19 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Dec 2018 08:16:15 +0000 (09:16 +0100)
commit1b2e742bf7230ce04cda5b7348f922174bef2d7a
treedc57c30dc3e34bf42155a19b6a0501bcf103c0ec
parent24e09d7a52ae07557fd8ac77492a8bb33bdeb132
USB: check usb_get_extra_descriptor for proper size

commit 704620afc70cf47abb9d6a1a57f3825d2bca49cf upstream.

When reading an extra descriptor, we need to properly check the minimum
and maximum size allowed, to prevent from invalid data being sent by a
device.

Reported-by: Hui Peng <benquike@gmail.com>
Reported-by: Mathias Payer <mathias.payer@nebelwelt.net>
Co-developed-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Hui Peng <benquike@gmail.com>
Signed-off-by: Mathias Payer <mathias.payer@nebelwelt.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/hub.c
drivers/usb/core/usb.c
drivers/usb/host/hwa-hc.c
include/linux/usb.h