tree 616dabaff973bc4483ece684c93afdb2dcacff59
parent d1e98f429aa10132b3010ba3b0be47552a2eb14b
author Oleg Nesterov <oleg@redhat.com> 1245281255 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1245355432 -0700

ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage

If the non-traced sub-thread calls do_notify_parent_cldstop(), we send the
notification to group_leader->real_parent and we report group_leader's
pid.

But, if group_leader is traced we use the wrong ->parent->nsproxy->pid_ns,
the tracer and parent can live in different namespaces.  Change the code
to use "parent" instead of tsk->parent.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>