From: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu, 2 Aug 2012 11:25:10 +0000 (-0700)
Subject: pidns: Capture the user namespace and filter ns_last_pid
X-Git-Tag: v3.8-rc1~77^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49f4d8b93ccf9454284b6f524b96c66d8d7fbccc;p=pandora-kernel.git

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>
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