tree ca78d6425d2624b845c0b57b34e1f740a5fda841
parent ed66dfaf236c04d414de1d218441296e57fb2bd2
author Xin Long <lucien.xin@gmail.com> 1511091064 +0800
committer David S. Miller <davem@davemloft.net> 1511094151 +0900

tun: fix rcu_read_lock imbalance in tun_build_skb

rcu_read_lock in tun_build_skb is used to rcu_dereference tun->xdp_prog
safely, rcu_read_unlock should be done in every return path.

Now I could see one place missing it, where it returns NULL in switch-case
XDP_REDIRECT,  another palce using rcu_read_lock wrongly, where it returns
NULL in if (xdp_xmit) chunk.

So fix both in this patch.

Fixes: 761876c857cb ("tap: XDP support")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>