android_kernel_motorola_sm6375/net/can
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Oliver Hartkopp 12d344d74c can: statistics: use atomic access in hot path
[ Upstream commit 80b5f90158d1364cbd80ad82852a757fc0692bf2 ]

In can_send() and can_receive() CAN messages and CAN filter matches are
counted to be visible in the CAN procfs files.

KCSAN detected a data race within can_send() when two CAN frames have
been generated by a timer event writing to the same CAN netdevice at the
same time. Use atomic operations to access the statistics in the hot path
to fix the KCSAN complaint.

Reported-by: syzbot+78ce4489b812515d5e4d@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/67cd717d.050a0220.e1a89.0006.GAE@google.com
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://patch.msgid.link/20250310143353.3242-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-04-10 14:29:42 +02:00
..
j1939 can: j1939: j1939_sk_send_loop(): fix unable to send messages with data length zero 2025-03-13 12:43:16 +01:00
af_can.c can: statistics: use atomic access in hot path 2025-04-10 14:29:42 +02:00
af_can.h can: statistics: use atomic access in hot path 2025-04-10 14:29:42 +02:00
bcm.c can: bcm: Clear bo->bcm_proc_read after remove_proc_entry(). 2024-11-08 16:20:27 +01:00
gw.c
Kconfig
Makefile
proc.c can: statistics: use atomic access in hot path 2025-04-10 14:29:42 +02:00
raw.c