[RFC] Race condition?

From: Kasper Dupont (kasperd@daimi.au.dk)
Date: Fri Aug 02 2002 - 08:46:45 EST

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;


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