From a1c9b23142ac8d6577613f6e41297ae24e7d313c Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Sat, 21 Mar 2020 14:08:29 +0100 Subject: [PATCH] slcan: not call free_netdev before rtnl_unlock in slcan_open [ Upstream commit 2091a3d42b4f339eaeed11228e0cbe9d4f92f558 ] As the description before netdev_run_todo, we cannot call free_netdev before rtnl_unlock, fix it by reorder the code. This patch is a 1:1 copy of upstream slip.c commit f596c87005f7 ("slip: not call free_netdev before rtnl_unlock in slip_open"). Reported-by: yangerkun Signed-off-by: Oliver Hartkopp Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/slcan.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index 453a2ea7895b..94b37c60fdd0 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -621,7 +621,10 @@ err_free_chan: tty->disc_data = NULL; clear_bit(SLF_INUSE, &sl->flags); slc_free_netdev(sl->dev); + /* do not call free_netdev before rtnl_unlock */ + rtnl_unlock(); free_netdev(sl->dev); + return err; err_exit: rtnl_unlock();