Messages in this thread |  | | Date | Thu, 4 Oct 2001 01:44:57 -0400 (EDT) | From | Alexander Viro <> | Subject | Re: Security question: "Text file busy" overwriting executables but not shared libraries? |
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On Thu, 4 Oct 2001, Linus Torvalds wrote:
> The reason the kernel refuses to honour it, is that MAP_DENYWRITE is an > excellent DoS-vehicle - you just mmap("/etc/passwd") with MAP_DENYWRITE, > and even root cannot write to it.. Vary nasty.
<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>
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