tree 06540b59a9d302687fd0519239729c1612d0e2b7
parent ae06c7c83fc6e97ba247a261921c101960f3d28f
author Eric W. Biederman <ebiederm@xmission.com> 1343906710 -0700
committer Eric W. Biederman <ebiederm@xmission.com> 1353333451 -0800

pidns: Capture the user namespace and filter ns_last_pid

- Capture the the user namespace that creates the pid namespace
- Use that user namespace to test if it is ok to write to
  /proc/sys/kernel/ns_last_pid.

Zhao Hongjiang <zhaohongjiang@huawei.com> noticed I was missing a put_user_ns
in when destroying a pid_ns.  I have foloded his patch into this one
so that bisects will work properly.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>