Oleksij Rempel 1a5751d58b net: introduce CAN specific pointer in the struct net_device ... [ Upstream commit 4e096a18867a5a989b510f6999d9c6b6622e8f7b ] Since 20dd3850bc ("can: Speed up CAN frame receiption by using ml_priv") the CAN framework uses per device specific data in the AF_CAN protocol. For this purpose the struct net_device->ml_priv is used. Later the ml_priv usage in CAN was extended for other users, one of them being CAN_J1939. Later in the kernel ml_priv was converted to an union, used by other drivers. E.g. the tun driver started storing it's stats pointer. Since tun devices can claim to be a CAN device, CAN specific protocols will wrongly interpret this pointer, which will cause system crashes. Mostly this issue is visible in the CAN_J1939 stack. To fix this issue, we request a dedicated CAN pointer within the net_device struct. Reported-by: syzbot+5138c4dd15a0401bec7b@syzkaller.appspotmail.com Fixes: 20dd3850bc ("can: Speed up CAN frame receiption by using ml_priv") Fixes: ffd956eef6 ("can: introduce CAN midlayer private and allocate it automatically") Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol") Fixes: 497a5757ce4e ("tun: switch to net core provided statistics counters") Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Link: https://lore.kernel.org/r/20210223070127.4538-1-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-04-07 15:00:07 +02:00
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j1939	net: introduce CAN specific pointer in the struct net_device	2021-04-07 15:00:07 +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: remove obsolete version strings	2020-10-12 10:06:39 +02:00
gw.c	can: remove obsolete version strings	2020-10-12 10:06:39 +02:00
isotp.c	can: isotp: tx-path: zero initialize outgoing CAN frames	2021-03-30 14:32:03 +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: remove obsolete version strings	2020-10-12 10:06:39 +02:00