Commit e5a47386 authored by Sukadev Bhattiprolu's avatar Sukadev Bhattiprolu Committed by Linus Torvalds

pidns: deny CLONE_PARENT|CLONE_NEWPID combination

CLONE_PARENT was used to implement an older threading model.  For
consistency with the CLONE_THREAD check in copy_pid_ns(), disable
CLONE_PARENT with CLONE_NEWPID, at least until the required semantics of
pid namespaces are clear.
Signed-off-by: default avatarSukadev Bhattiprolu <>
Acked-by: default avatarRoland McGrath <>
Acked-by: default avatarSerge Hallyn <>
Cc: Oren Laadan <>
Cc: Oleg Nesterov <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 123be07b
......@@ -118,7 +118,7 @@ struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old
if (!(flags & CLONE_NEWPID))
return get_pid_ns(old_ns);
if (flags & CLONE_THREAD)
return ERR_PTR(-EINVAL);
return create_pid_namespace(old_ns);
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