[PATCH 4.4-stable] slip: stop double free sl->dev in slip_open

After commit e4c157955483 ("slip: Fix use-after-free Read in slip_open"), we will double free sl->dev since sl_free_netdev will free sl->dev too. It's fine for mainline since sl_free_netdev in mainline won't free sl->dev.

Signed-off-by: yangerkun yangerkun@huawei.com --- drivers/net/slip/slip.c | 1 - 1 file changed, 1 deletion(-)

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c index ef6b25ec75a1..7fe9183fad0e 100644 --- a/drivers/net/slip/slip.c +++ b/drivers/net/slip/slip.c @@ -861,7 +861,6 @@ err_free_chan: tty->disc_data = NULL; clear_bit(SLF_INUSE, &sl->flags); sl_free_netdev(sl->dev); - free_netdev(sl->dev);

err_exit: rtnl_unlock();