diff options
| author | Florian Westphal <fw@strlen.de> | 2021-04-14 19:12:53 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2021-04-19 13:25:11 +0300 |
| commit | 6218fe186109b93a2fa2343e13981e016e9961ab (patch) | |
| tree | a28194aa53b05dd3dcebbddbffed0e2ba9626e63 /net/xfrm/xfrm_user.c | |
| parent | 7baf867fef7cc65d666792e9d1b911beffe74ad7 (diff) | |
| download | linux-6218fe186109b93a2fa2343e13981e016e9961ab.tar.xz | |
xfrm: avoid synchronize_rcu during netns destruction
Use the new exit_pre hook to NULL the netlink socket.
The net namespace core will do a synchronize_rcu() between the exit_pre
and exit/exit_batch handlers.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index df8bc8fc724c..f0aecee4d539 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -3480,18 +3480,22 @@ static int __net_init xfrm_user_net_init(struct net *net) return 0; } +static void __net_exit xfrm_user_net_pre_exit(struct net *net) +{ + RCU_INIT_POINTER(net->xfrm.nlsk, NULL); +} + static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) { struct net *net; - list_for_each_entry(net, net_exit_list, exit_list) - RCU_INIT_POINTER(net->xfrm.nlsk, NULL); - synchronize_net(); + list_for_each_entry(net, net_exit_list, exit_list) netlink_kernel_release(net->xfrm.nlsk_stash); } static struct pernet_operations xfrm_user_net_ops = { .init = xfrm_user_net_init, + .pre_exit = xfrm_user_net_pre_exit, .exit_batch = xfrm_user_net_exit, }; |