can: j1939: j1939_sk_init(): set SOCK_RCU_FREE to call sk_destruct() after RCU is done

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commit 22c696fed2 upstream.

Set SOCK_RCU_FREE to let RCU to call sk_destruct() on completion.
Without this patch, we will run in to j1939_can_recv() after priv was
freed by j1939_sk_release()->j1939_sk_sock_destruct()

Fixes: 25fe97cb76 ("can: j1939: move j1939_priv_put() into sk_destruct callback")
Link: https://lore.kernel.org/r/20210617130623.12705-1-o.rempel@pengutronix.de
Cc: linux-stable <stable@vger.kernel.org>
Reported-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Reported-by: syzbot+bdf710cfc41c186fdff3@syzkaller.appspotmail.com
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Oleksij Rempel 2021-06-17 15:06:23 +02:00 • committed by Greg Kroah-Hartman

parent ebf91625b3

commit 54dc7c1574

2 changed files with 7 additions and 0 deletions

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4

net/can/j1939/main.c

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3

net/can/j1939/socket.c

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