From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Date: Tue, 6 Jan 2009 22:42:45 +0000 (-0800)
Subject: SEND_SIG_NOINFO: masquerade si_pid when crossing pid-ns boundary
X-Git-Tag: v2.6.29-rc1~252
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09bca05c90c639f57aae057e0c28f287e61f5a07;p=pandora-kernel.git

SEND_SIG_NOINFO: masquerade si_pid when crossing pid-ns boundary

For SEND_SIG_NOINFO, si_pid is currently set to the pid of sender
in sender's active pid namespace. But if the receiver is in a
Eg: when parent sends the 'pdeath_signal' to a child that is in
a descendant pid namespace, we should set si_pid 0.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-By: Roland McGrath <roland@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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