Re: [RFC/PATCH] revoke/frevoke system calls V2

From: Pekka Enberg
Date: Thu Jul 27 2006 - 14:08:31 EST

On Thu, 2006-07-27 at 20:06 +0200, Petr Baudis wrote:
> Make that setuid root or just create log file owned by you and make root
> run it. Should be innocent enough, right?
> Well, except that you can revoke the log file before the shadow file is
> opened, at which point open() probably reuses the fd and the program
> conveniently logs to /etc/shadow.

No, the fd is leaked on purpose to avoid recycling. See revoke_fds for

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