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    SubjectRe: [PATCH v3] fs: introduce pipe-only dump mode suid_dumpable=3
    On Fri, Jun 22, 2012 at 12:55 PM, Andrew Morton
    <> wrote:
    > On Fri, 22 Jun 2012 12:24:13 -0700
    > Kees Cook <> wrote:
    >> The value
    >> of suid_dumpable=2 is now historic, and attempting to set this sysctl
    >> value returns -EINVAL.
    > This sounds a bit harsh - will it not cause existing configurations to
    > immediately break?  If so, would it not be better to retain the =2 mode
    > for a while, and emit a nice warning when it is set?

    I view it as a security vulnerability, so I'd rather see it
    eliminated. I see "=1" as a security vulnerability too, but at least
    that's well-known to be a bad idea. The "=2" mode has been assumed to
    be safe, but it isn't.


    Kees Cook
    Chrome OS Security
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