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    SubjectRe: thoughts on kernel security issues
    * Linus Torvalds ( wrote:
    > On Thu, 13 Jan 2005, Alan Cox wrote:
    > >
    > > On Iau, 2005-01-13 at 16:38, Linus Torvalds wrote:
    > > > It wouldn't be a global flag. It's a per-process flag. For example, many
    > > > people _do_ need to execute binaries in their home directory. I do it all
    > > > the time. I know what a compiler is.
    > >
    > > noexec has never been worth anything because of scripts. Kernel won't
    > > load that binary, I can write a script to do it.
    > Scripts can only do what the interpreter does. And it's often a lot harder
    > to get the interpreter to do certain things. For example, you simply
    > _cannot_ get any thread race conditions with most scripts out there, nor
    > can you generally use magic mmap patterns.

    I think perl has threads and some type of free form syscall ability.
    Heck, with a legit elf binary and gdb you can get a long ways. But I
    agree in two things. 1) It's all about layers, since there is no silver
    bullet, and 2) Containment goes a long ways to mitigate damage.

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