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    SubjectRe: Linux 2.6.20-rc7
    H. Peter Anvin wrote:
    > Linus Torvalds wrote:
    >>
    >> On Wed, 31 Jan 2007, H. Peter Anvin wrote:
    >>> It would be interesting to know what the inode numbers are in the
    >>> image; also,
    >>> what is the exact behaviour -- do you end up with a missing link, or
    >>> do both
    >>> entries end up getting hard-linked to an empty file?
    >>
    >> Judging by the
    >>
    >> request_module: runaway loop modprobe binfmt-0000
    >>
    >> one or more of the hardlinked binaries (modprobe being one, but not
    >> necessarily the one that initially triggers hits) will read all zeroes-
    >>
    >> Or at least bytes at offsets 2 and 3 will read as zero, causing it to
    >> not be recognized as a proper binary, causing that "binfmt-0000" thing.
    >>
    >
    > Or perhaps not read at all, which would explain the problem.
    >
    > cpio represents a hard link as who headers with the same type and the
    > same file (inode) number and a link count that is > 1. Only the first
    > one contains data; the subsequent ones have length 0. It's fairly easy
    > for a bug in the decoder to truncate the file upon encountering the
    > second header, since this is somewhat of a special case (it would have
    > been better if the cpio format distinguished "hard link" explicitly, as
    > tar does.)
    >
    > I will look into this as soon as I can, but as I'm currently in the
    > middle of job hunting it might take until the weekend.

    What's the proper way to make sure that the fix, when it appears, ends up in
    my inbox?

    --
    Alexander E. Patrakov
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