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authorOliver Hartkopp <socketcan@hartkopp.net>2021-06-18 19:37:13 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2021-06-19 23:54:00 +0200
commit14a4696bc3118ba49da28f79280e1d55603aa737 (patch)
tree0d45c20e707975956c63ccb4608d16b5fe5f291e /net/can/j1939/socket.c
parentfb8696ab14adadb2e3f6c17c18ed26b3ecd96691 (diff)
can: isotp: isotp_release(): omit unintended hrtimer restart on socket release
When closing the isotp socket, the potentially running hrtimers are canceled before removing the subscription for CAN identifiers via can_rx_unregister(). This may lead to an unintended (re)start of a hrtimer in isotp_rcv_cf() and isotp_rcv_fc() in the case that a CAN frame is received by isotp_rcv() while the subscription removal is processed. However, isotp_rcv() is called under RCU protection, so after calling can_rx_unregister, we may call synchronize_rcu in order to wait for any RCU read-side critical sections to finish. This prevents the reception of CAN frames after hrtimer_cancel() and therefore the unintended (re)start of the hrtimers. Link: https://lore.kernel.org/r/20210618173713.2296-1-socketcan@hartkopp.net Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol") Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can/j1939/socket.c')
0 files changed, 0 insertions, 0 deletions