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    SubjectRe: [PATCH v2] fs: select: fix information leak to userspace


    Am 23.11.2010 21:18, schrieb Andrew Morton:
    > On Tue, 23 Nov 2010 11:02:44 -0700
    > Andreas Dilger <adilger.kernel@dilger.ca> wrote:
    >
    >> On 2010-11-23, at 07:45, walter harms wrote:
    >>> Maybe we can convince the gcc people to make 0 padding default. That will not solve the problems for other compilers but when they claim "works like gcc" we can press then to support this also. I can imagine that this will close some other subtle leaks also.
    >>
    >> It makes the most sense to tackle this at the GCC level, since the added overhead of doing memset(0) on the whole struct may be non-trivial for commonly-used and/or large structures.
    >
    > (My, what long lines you have!)
    >
    > We can't reasonably address this with gcc changes. If gcc starts doing
    > what we want in the next release, how long will it be until that
    > release is the *oldest* version of gcc which the kernel may be compiled
    > with? Five years?
    >
    >
    agreed, but it does not mean not to talk to the gcc people that there is
    an interesse to change.

    re,
    wh


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