[PATCH] namespace:unmount pid_namespace's proc_mnt when copy_net_ns failed

Gao feng
2012-11-02T00:38:51Z

we should call pid_ns_release_proc to unmount pid_namespace's
proc_mnt when copy_net_ns failed in function create_new_namespaces.

otherwise,the proc_mnt will not be freed and because the super_block
of proc_mnt also add the reference of the pid_namespace,so this
pid_namespace will never be released too.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
---
kernel/nsproxy.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index b576f7f..d536480 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -99,8 +99,11 @@ static struct nsproxy *create_new_namespaces(unsigned long flags,
return new_nsp;

out_net:
- if (new_nsp->pid_ns)
+ if (new_nsp->pid_ns) {
+ if (flags & CLONE_NEWPID)
+ pid_ns_release_proc(new_nsp->pid_ns);
put_pid_ns(new_nsp->pid_ns);
+ }
out_pid:
if (new_nsp->ipc_ns)
put_ipc_ns(new_nsp->ipc_ns);
--
1.7.7.6