netdevsim: fix unbalaced locking in nsim_create()

In the nsim_create(), rtnl_lock() is called before nsim_bpf_init().
If nsim_bpf_init() is failed, rtnl_unlock() should be called,
but it isn't called.
So, unbalanced locking would occur.

Fixes: e05b2d141fef ("netdevsim: move netdev creation/destruction to dev probe")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index 2908e0a0d6e19aab337634e43b03f0296d0102aa..23950e7a0f81ef11365dbbb6891052d82be6d65c 100644 (file)
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -302,7 +302,7 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
        rtnl_lock();
        err = nsim_bpf_init(ns);
        if (err)
-               goto err_free_netdev;
+               goto err_rtnl_unlock;
 
        nsim_ipsec_init(ns);
 
@@ -316,8 +316,8 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
 err_ipsec_teardown:
        nsim_ipsec_teardown(ns);
        nsim_bpf_uninit(ns);
+err_rtnl_unlock:
        rtnl_unlock();
-err_free_netdev:
        free_netdev(dev);
        return ERR_PTR(err);
 }