linux

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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: 9d71dd0c7009 ("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

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()