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linux/net/can
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Oliver Hartkopp c85b96eaf7 can: bcm: fix locking for bcm_op runtime updates 
[ Upstream commit c35636e91e ]

Commit c2aba69d0c ("can: bcm: add locking for bcm_op runtime updates")
added a locking for some variables that can be modified at runtime when
updating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup().

Usually the RX_SETUP only handles and filters incoming traffic with one
exception: When the RX_RTR_FRAME flag is set a predefined CAN frame is
sent when a specific RTR frame is received. Therefore the rx bcm_op uses
bcm_can_tx() which uses the bcm_tx_lock that was only initialized in
bcm_tx_setup(). Add the missing spin_lock_init() when allocating the
bcm_op in bcm_rx_setup() to handle the RTR case properly.

Fixes: c2aba69d0c ("can: bcm: add locking for bcm_op runtime updates")
Reported-by: syzbot+5b11eccc403dd1cea9f8@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-can/699466e4.a70a0220.2c38d7.00ff.GAE@google.com/
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://patch.msgid.link/20260218-bcm_spin_lock_init-v1-1-592634c8a5b5@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-04-18 10:33:10 +02:00
..
j1939 net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts 2026-02-06 16:41:47 +01:00
af_can.c can: statistics: use atomic access in hot path 2025-04-10 14:32:03 +02:00
af_can.h can: statistics: use atomic access in hot path 2025-04-10 14:32:03 +02:00
bcm.c can: bcm: fix locking for bcm_op runtime updates 2026-04-18 10:33:10 +02:00
gw.c can: gw: fix RCU/BH usage in cgw_create_job() 2025-05-18 08:20:35 +02:00
isotp.c can: isotp: isotp_sendmsg(): fix TX state detection and wait behavior 2023-11-08 17:26:49 +01:00
Kconfig net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
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 14:32:03 +02:00
raw.c can: raw: add support for SO_MARK 2024-01-15 18:51:14 +01:00