Messages in this thread |  | | Date | Wed, 3 Oct 2001 22:49:27 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: Security question: "Text file busy" overwriting executables but not shared libraries? |
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On Thu, 4 Oct 2001, Alexander Viro wrote: > <nit> > I _really_ doubt that something does write() on /etc/passwd. Create a > file and rename it over the thing - sure, but that's it. > </nit>
Well, yeah, bad choice. Can you believe /var/run/utmp or similar?
And yes, we could add checks for the thing being executable before we accept MAP_DENYWRITE instead of just ignoring the flag from user space. Nobody has cared enough to make the effort.
Until now?
Linus
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