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commit 8c21c54a53ab21842f5050fa090f26b03c0313d6 upstream.
We need to drop skb references taken in j1939_session_skb_queue() when
destroying a session in j1939_session_destroy(). Otherwise those skbs
would be lost.
Link to Syzkaller info and repro: https://forge.ispras.ru/issues/11743.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
V1: https://lore.kernel.org/all/20220708175949.539064-1-pchelkin@ispras.ru
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Suggested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/all/20220805150216.66313-1-pchelkin@ispras.ru
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
a0278dbeaa