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linux/net/can
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Tetsuo Handa 1809c82aa0 net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts 
Since j1939_session_deactivate_activate_next() in j1939_tp_rxtimer() is
called only when the timer is enabled, we need to call
j1939_session_deactivate_activate_next() if we cancelled the timer.
Otherwise, refcount for j1939_session leaks, which will later appear as

| unregister_netdevice: waiting for vcan0 to become free. Usage count = 2.

problem.

Reported-by: syzbot <syzbot+881d65229ca4f9ae8c84@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=881d65229ca4f9ae8c84
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Link: https://patch.msgid.link/b1212653-8fa1-44e1-be9d-12f950fb3a07@I-love.SAKURA.ne.jp
Cc: stable@vger.kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
History 2026-01-15 09:52:39 +01:00
..
j1939 net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts 2026-01-15 09:52:39 +01:00
af_can.c can: annotate mtu accesses with READ_ONCE() 2025-09-23 10:04:58 +02:00
af_can.h can: statistics: use atomic access in hot path 2025-03-14 09:47:00 +01:00
bcm.c net: Convert proto_ops connect() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
gw.c can: gw: fix RCU/BH usage in cgw_create_job() 2025-05-06 15:55:36 +02:00
isotp.c net: Convert proto_ops bind() callbacks to use sockaddr_unsized 2025-11-04 19:10:32 -08:00
Kconfig can: fix build dependency 2025-12-10 09:19:34 +01:00
Makefile can: add ISO 15765-2:2016 transport protocol 2020-10-07 23:18:33 +02:00
proc.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
raw.c can: raw: instantly reject disabled CAN frames 2026-01-15 09:52:04 +01:00