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(parent: 654b404) | patch
USB: serial: safe_serial: fix information leak in completion handler
authorJohan Hovold <johan@kernel.org>
Mon, 6 Mar 2017 16:36:41 +0000 (17:36 +0100)
committerJohan Hovold <johan@kernel.org>
Wed, 8 Mar 2017 15:14:42 +0000 (16:14 +0100)
commit8c76d7cd520ebffc1ea9ea0850d87a224a50c7f2
treeab1bcdcb384c34819fadbdf38dde2dda4a6d2ca5tree | snapshot
parent654b404f2a222f918af9b0cd18ad469d0c941a8ecommit | diff
USB: serial: safe_serial: fix information leak in completion handler

Add missing sanity check to the bulk-in completion handler to avoid an
integer underflow that could be triggered by a malicious device.

This avoids leaking up to 56 bytes from after the URB transfer buffer to
user space.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
drivers/usb/serial/safe_serial.c diff | blob | history
Domain: System / Kernel;