Norbert Slusarek 0dac8b0ad0 can: j1939: j1939_sk_setsockopt(): prevent allocation of j1939 filter for optlen == 0 ... [ Upstream commit aaf473d0100f64abc88560e2bea905805bcf2a8e ] If optval != NULL and optlen == 0 are specified for SO_J1939_FILTER in j1939_sk_setsockopt(), memdup_sockptr() will return ZERO_PTR for 0 size allocation. The new filter will be mistakenly assigned ZERO_PTR. This patch checks for optlen != 0 and filter will be assigned NULL in case of optlen == 0. Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol") Link: https://lore.kernel.org/r/20210620123842.117975-1-nslusarek@gmx.net Signed-off-by: Norbert Slusarek <nslusarek@gmx.net> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-14 16:56:27 +02:00
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j1939	can: j1939: j1939_sk_setsockopt(): prevent allocation of j1939 filter for optlen == 0	2021-07-14 16:56:27 +02:00
af_can.c	net: introduce CAN specific pointer in the struct net_device	2021-04-07 15:00:07 +02:00
af_can.h	can: introduce CAN midlayer private and allocate it automatically	2019-09-04 13:29:14 +02:00
bcm.c	can: bcm: delay release of struct bcm_op after synchronize_rcu()	2021-07-14 16:55:41 +02:00
gw.c	can: gw: synchronize rcu operations before removing gw job entry	2021-07-14 16:55:41 +02:00
isotp.c	can: isotp: isotp_release(): omit unintended hrtimer restart on socket release	2021-07-14 16:55:41 +02:00
Kconfig	can: isotp: Explain PDU in CAN_ISOTP help text	2020-11-03 22:30:31 +01:00
Makefile	can: add ISO 15765-2:2016 transport protocol	2020-10-07 23:18:33 +02:00
proc.c	net: introduce CAN specific pointer in the struct net_device	2021-04-07 15:00:07 +02:00
raw.c	can: bcm/raw/isotp: use per module netdevice notifier	2021-06-23 14:42:50 +02:00