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USB: serial: keyspan_pda: fix receive sanity checks
authorJohan Hovold <johan@kernel.org>
Tue, 31 Jan 2017 16:17:29 +0000 (17:17 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 14 May 2017 11:32:56 +0000 (13:32 +0200)
commit07a929374baa560adb94b950d6bd5f81ebdf3444
treed98a103c8fae16418716cc46f46d0d5e81cad7e3
parent2428776eb1e60acf636a48a76acd8a27ccf92aa8
USB: serial: keyspan_pda: fix receive sanity checks

commit c528fcb116e61afc379a2e0a0f70906b937f1e2c upstream.

Make sure to check for short transfers before parsing the receive buffer
to avoid acting on stale data.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/keyspan_pda.c