From: yangerkun yangerkun@huawei.com

commit f596c87005f7b1baeb7d62d9a9e25d68c3dfae10 upstream.

As the description before netdev_run_todo, we cannot call free_netdev before rtnl_unlock, fix it by reorder the code.

Signed-off-by: yangerkun yangerkun@huawei.com Reviewed-by: Oliver Hartkopp socketcan@hartkopp.net Signed-off-by: David S. Miller davem@davemloft.net [bwh: Backported to <4.11: free_netdev() is called through sl_free_netdev()] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/net/slip/slip.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c index cc841126147e..f870396e05e1 100644 --- a/drivers/net/slip/slip.c +++ b/drivers/net/slip/slip.c @@ -867,7 +867,10 @@ static int slip_open(struct tty_struct *tty) sl->tty = NULL; tty->disc_data = NULL; clear_bit(SLF_INUSE, &sl->flags); + /* do not call free_netdev before rtnl_unlock */ + rtnl_unlock(); sl_free_netdev(sl->dev); + return err;

err_exit: rtnl_unlock();