Re: CLONE_PARENT after setns(CLONE_NEWPID)

From: Christian Seiler
Date: Wed Jan 15 2014 - 16:20:40 EST


Eric W. Biederman writes:
So hmm.

Because it can do no harm, and because it is a regression let's remove
the CLONE_PARENT check and send it stable.

diff --git a/kernel/fork.c b/kernel/fork.c
index 086fe73..c447fbc 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1174,7 +1174,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
* do not allow it to share a thread group or signal handlers or
* parent with the forking task.
*/
- if (clone_flags & (CLONE_SIGHAND | CLONE_PARENT)) {
+ if (clone_flags & (CLONE_SIGHAND)) {
if ((clone_flags & (CLONE_NEWUSER | CLONE_NEWPID)) ||
(task_active_pid_ns(current) !=
current->nsproxy->pid_ns_for_children))

Just a short question, what happened to this patch? As far as I can
tell, 3.13rc8 doesn't include it, neither does the current 3.12.7. This
means that lxc-attach currently still doesn't work on 3.12 and probably
won't work on 3.13 either... (3.11 is fine, see the previous mails in
this thread.)

-- Christian

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