Re: Fw: Badness around put_cred()

[David Howells]

One thing you could try doing is making do_notify_resume() check the credential
subscriptions on the process as it's about to resume userspace.  The following
assertions both ought to hold:

	BUG_ON(current->cred != current->real_cred);
	BUG_ON(atomic_read(current->cred->usage) >= 2);

And then set TIF_NOTIFY_RESUME in put_cred() and get_new_cred().

David
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