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Oliver Hartkopp d840c84cdd can: statistics: use atomic access in hot path ... [ Upstream commit 80b5f90158 ] 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>		History 2025-04-10 14:39:31 +02:00
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j1939	can: j1939: j1939_sk_send_loop(): fix unable to send messages with data length zero	2025-02-21 14:01:33 +01:00
af_can.c	can: statistics: use atomic access in hot path	2025-04-10 14:39:31 +02:00
af_can.h	can: statistics: use atomic access in hot path	2025-04-10 14:39:31 +02:00
bcm.c	can: bcm: Clear bo->bcm_proc_read after remove_proc_entry().	2024-09-12 09:40:08 +02:00
gw.c	can: gw: give feedback on missing CGW_FLAGS_CAN_IIF_TX_OK flag	2023-02-02 15:42:10 +01:00
isotp.c	can: isotp: remove ISO 15675-2 specification version where possible	2024-06-20 11:52:56 +02:00
Kconfig	can: isotp: remove ISO 15675-2 specification version where possible	2024-06-20 11:52:56 +02:00
Makefile	can: add ISO 15765-2:2016 transport protocol	2020-10-07 23:18:33 +02:00
proc.c	can: statistics: use atomic access in hot path	2025-04-10 14:39:31 +02:00
raw.c	can: raw: raw_getsockopt(): reduce scope of err	2024-02-20 09:40:46 +01:00