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    SubjectRe: [PATCH] SUNRPC: Prevent kernel stack corruption on long values of flush
    Dave Jones wrote:

    On Wed, Jul 18, 2012 at 04:00:49PM -0400, Jim Rees wrote:

    > You could use something like:
    >
    > char tbuf[sizeof (unsigned long) * 24 / 10 + 1 + 2]; /* + 2 for final "\n\0" */
    >
    > since there are roughly 10 bits for every 3 decimal digits.
    >
    > But I'm obviously confused, because I don't understand why tbuf needs to be
    > any more than 10 + 2.

    Unsigned long isn't necessarily 32 bits.
    On 64-bit systems %lu can be up to 18446744073709551615

    Thanks. You caught me thinking "Intel." How embarrassing.


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