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vti6: Don't unregister pernet ops twice on init errors

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If we fail to register one of the xfrm protocol handlers we will
unregister the pernet ops twice on the error exit path. This will
probably lead to a kernel panic as the double deregistration
leads to a double kfree().

Fix this by removing one of the calls to do it only once.

Fixes: fa9ad96d49 ("vti6: Update the ipv6 side to use its own...")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Mathias Krause 2014-05-09 23:43:40 +02:00 committed by Steffen Klassert
parent edb666f07e
commit fd71143645
1 changed files with 0 additions and 3 deletions
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3
net/ipv6/ip6_vti.c
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@ -1097,7 +1097,6 @@ static int __init vti6_tunnel_init(void)
err = xfrm6_protocol_register(&vti_esp6_protocol, IPPROTO_ESP);
if (err < 0) {
unregister_pernet_device(&vti6_net_ops);
pr_err("%s: can't register vti6 protocol\n", __func__);
goto out;
@ -1106,7 +1105,6 @@ static int __init vti6_tunnel_init(void)
err = xfrm6_protocol_register(&vti_ah6_protocol, IPPROTO_AH);
if (err < 0) {
xfrm6_protocol_deregister(&vti_esp6_protocol, IPPROTO_ESP);
unregister_pernet_device(&vti6_net_ops);
pr_err("%s: can't register vti6 protocol\n", __func__);
goto out;
@ -1116,7 +1114,6 @@ static int __init vti6_tunnel_init(void)
if (err < 0) {
xfrm6_protocol_deregister(&vti_ah6_protocol, IPPROTO_AH);
xfrm6_protocol_deregister(&vti_esp6_protocol, IPPROTO_ESP);
unregister_pernet_device(&vti6_net_ops);
pr_err("%s: can't register vti6 protocol\n", __func__);
goto out;