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    SubjectRe: [PATCH v1] random: block in /dev/urandom
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    On 3/22/22 10:09, Jason A. Donenfeld wrote:
    > Hey Guenter,
    >
    > On Tue, Mar 22, 2022 at 08:58:20AM -0700, Guenter Roeck wrote:
    >> On Thu, Feb 17, 2022 at 05:28:48PM +0100, Jason A. Donenfeld wrote:
    >>> This topic has come up countless times, and usually doesn't go anywhere.
    >>> This time I thought I'd bring it up with a slightly narrower focus,
    >>> updated for some developments over the last three years: we finally can
    >>> make /dev/urandom always secure, in light of the fact that our RNG is
    >>> now always seeded.
    >>>
    >>
    >> [ ... ]
    >>
    >> This patch (or a later version of it) made it into mainline and causes a
    >> large number of qemu boot test failures for various architectures (arm,
    >> m68k, microblaze, sparc32, xtensa are the ones I observed). Common
    >> denominator is that boot hangs at "Saving random seed:". A sample bisect
    >> log is attached. Reverting this patch fixes the problem.
    >
    > As Linus said, it was worth a try, but I guess it just didn't work. For
    > my own curiosity, though, do you have a link to those QEMU VMs you could
    > share? I'd sort of like to poke around, and if we do ever reattempt this
    > sometime down the road, it seems like understanding everything about why
    > the previous time failed might be a good idea.
    >

    Everything - including the various root file systems - is at
    git@github.com:groeck/linux-build-test.git. Look into rootfs/ for the
    various boot tests. I'll be happy to provide some qemu command lines
    if needed.

    Guenter

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