can: raw: raw_setsockopt: limit number of can_filter that can be set
authorMarc Kleine-Budde <mkl@pengutronix.de>
Mon, 5 Dec 2016 10:44:23 +0000 (11:44 +0100)
committerMarc Kleine-Budde <mkl@pengutronix.de>
Wed, 7 Dec 2016 09:45:57 +0000 (10:45 +0100)
commit332b05ca7a438f857c61a3c21a88489a21532364
treef30e326f3e623c103bc6e9735e7e958a90ecef20
parentbc3913a5378cd0ddefd1dfec6917cc12eb23a946
can: raw: raw_setsockopt: limit number of can_filter that can be set

This patch adds a check to limit the number of can_filters that can be
set via setsockopt on CAN_RAW sockets. Otherwise allocations > MAX_ORDER
are not prevented resulting in a warning.

Reference: https://lkml.org/lkml/2016/12/2/230

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
include/uapi/linux/can.h
net/can/raw.c