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Date: Thu, 30 Jul 2020 07:41:25 +0200 From: Steffen Klassert <steffen.klassert@...unet.com> To: David Miller <davem@...emloft.net> CC: Herbert Xu <herbert@...dor.apana.org.au>, Steffen Klassert <steffen.klassert@...unet.com>, <netdev@...r.kernel.org> Subject: [PATCH 14/19] ip_vti: not register vti_ipip_handler twice From: Xin Long <lucien.xin@...il.com> An xfrm_tunnel object is linked into the list when registering, so vti_ipip_handler can not be registered twice, otherwise its next pointer will be overwritten on the second time. So this patch is to define a new xfrm_tunnel object to register for AF_INET6. Fixes: e6ce64570f24 ("ip_vti: support IPIP6 tunnel processing") Signed-off-by: Xin Long <lucien.xin@...il.com> Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com> --- net/ipv4/ip_vti.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c index c0b97b8f6fbd..3e5d54517145 100644 --- a/net/ipv4/ip_vti.c +++ b/net/ipv4/ip_vti.c @@ -484,6 +484,13 @@ static struct xfrm_tunnel vti_ipip_handler __read_mostly = { .err_handler = vti4_err, .priority = 0, }; + +static struct xfrm_tunnel vti_ipip6_handler __read_mostly = { + .handler = vti_rcv_tunnel, + .cb_handler = vti_rcv_cb, + .err_handler = vti4_err, + .priority = 0, +}; #endif static int __net_init vti_init_net(struct net *net) @@ -660,7 +667,7 @@ static int __init vti_init(void) if (err < 0) goto xfrm_tunnel_ipip_failed; #if IS_ENABLED(CONFIG_IPV6) - err = xfrm4_tunnel_register(&vti_ipip_handler, AF_INET6); + err = xfrm4_tunnel_register(&vti_ipip6_handler, AF_INET6); if (err < 0) goto xfrm_tunnel_ipip6_failed; #endif @@ -676,7 +683,7 @@ static int __init vti_init(void) rtnl_link_failed: #if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) #if IS_ENABLED(CONFIG_IPV6) - xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET6); + xfrm4_tunnel_deregister(&vti_ipip6_handler, AF_INET6); xfrm_tunnel_ipip6_failed: #endif xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET); @@ -699,7 +706,7 @@ static void __exit vti_fini(void) rtnl_link_unregister(&vti_link_ops); #if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) #if IS_ENABLED(CONFIG_IPV6) - xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET6); + xfrm4_tunnel_deregister(&vti_ipip6_handler, AF_INET6); #endif xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET); #endif -- 2.17.1
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