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    Subject[RFC] Race condition?
    Is there a race condition in this piece of code from do_fork in
    linux/kernel/fork.c? I cannot see what prevents two processes
    from calling this at the same time and both successfully fork
    even though the user had only one process left.

    if (atomic_read(&p->user->processes) >= p->rlim[RLIMIT_NPROC].rlim_cur
    && !capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RESOURCE))
    goto bad_fork_free;

    atomic_inc(&p->user->__count);
    atomic_inc(&p->user->processes);

    --
    Kasper Dupont -- der bruger for meget tid på usenet.
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