can: j1939: j1939_sk_bind(): call j1939_priv_put() immediately when j1939_local_ecu_g...
authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Sun, 24 Aug 2025 10:30:09 +0000 (19:30 +0900)
committerMarc Kleine-Budde <mkl@pengutronix.de>
Wed, 10 Sep 2025 15:12:04 +0000 (17:12 +0200)
commitf214744c8a27c3c1da6b538c232da22cd027530e
tree419713ad21b8ee8cac165ba4d0939c7b5336de2e
parent7fcbe5b2c6a4b5407bf2241fdb71e0a390f6ab9a
can: j1939: j1939_sk_bind(): call j1939_priv_put() immediately when j1939_local_ecu_get() failed

Commit 25fe97cb7620 ("can: j1939: move j1939_priv_put() into sk_destruct
callback") expects that a call to j1939_priv_put() can be unconditionally
delayed until j1939_sk_sock_destruct() is called. But a refcount leak will
happen when j1939_sk_bind() is called again after j1939_local_ecu_get()
 from previous j1939_sk_bind() call returned an error. We need to call
j1939_priv_put() before j1939_sk_bind() returns an error.

Fixes: 25fe97cb7620 ("can: j1939: move j1939_priv_put() into sk_destruct callback")
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>
Link: https://patch.msgid.link/4f49a1bc-a528-42ad-86c0-187268ab6535@I-love.SAKURA.ne.jp
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
net/can/j1939/socket.c