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    SubjectRe: Fw: Local Denial-of-Service attack against Linux
    Alexey Kuznetosv wrote:
    > > The code is really weird:
    > >
    > > * sk->sndbuf is initialized to wmem_default, but sock_setsockopt() sets
    > > sk->sndbuf to 2*the user supplied number.
    >
    > Yes. What is strange here?
    >

    1) setsockopt(SO_SNDBUF,x);
    y=getsockopt(SO_SNDBUF);

    now y=2*x

    2) or
    x = get_wmem_default_with_sysctl();
    setsockopt(SO_SNDBUF,x);

    Doesn't restore the original send buffer, it doubles the send buffer
    size.

    If we set the internal send buffers to 2* the user space number, then
    should do that everywhere.
    --
    Manfred

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