Date: Fri, 22 Dec 2017 23:22:37 +0700
From: Robert Elz <k...@munnari.oz.au>
Message-ID: <1080.1513959...@andromeda.noi.kre.to>
| where vm was declared as
|
| struct vmspace *vm;
|
| but is not otherwise initialised
Well, not quite, I missed this call in ptrce_doio()
error = proc_vmspace_getref(l->l_proc, vm);
where proc_vmspace_getref() is ...
if ((p != curproc && (p->p_sflag & PS_WEXIT) != 0) ||
(p->p_vmspace->vm_refcnt < 1)) { /* XXX */
return EFAULT;
}
uvmspace_addref(p->p_vmspace);
*vm = p->p_vmspace;
which is much more complex than the old (and now current way) which
more or less boils down to
*vm = proc0.p_vmspace;
(except there is no vm to * ... bt for easier comparison.)
The EFAULT that is returned there is probably the one Kamil mentioned.
kre
