Date: Mon, 18 Jan 1999 20:26:18 -0500 (EST) From: Brian Feldman <green@unixhelp.org> To: Bruce Evans <bde@zeta.org.au> Cc: mike@smith.net.au, current@FreeBSD.ORG, dillon@apollo.backplane.com, julian@whistle.com Subject: Re: kernel malloc and M_CANWAIT Message-ID: <Pine.BSF.4.05.9901182020280.5579-100000@janus.syracuse.net> In-Reply-To: <199901182221.JAA18722@godzilla.zeta.org.au>
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On Tue, 19 Jan 1999, Bruce Evans wrote:
> >Look at the void () functions that call malloc/MALLOC. Also, commit the
> >attached patch; it was OKed by Bruce to disallow this, but he seems to forget
> >to commit it.
>
> It is queued behind 10-100 other patches.
>
> >--- src/sys/kern/vfs_syscalls.c.orig Fri Dec 25 22:27:21 1998
> >+++ src/sys/kern/vfs_syscalls.c Fri Dec 25 22:28:12 1998
> >@@ -2909,6 +2909,10 @@
> > if (error = namei(&nd))
> > return (error);
> > vp = nd.ni_vp;
> >+ if (vp->v_type == VFIFO) {
> >+ error = EINVAL;
> >+ goto out;
> >+ }
> > if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
> > goto out;
> > if (p->p_ucred->cr_uid != vattr.va_uid &&
>
> Actually, the patch from Lite1 is queued. It also backs out support
> for revoke of everything except cdevs and bdevs. I don't have time to
> check what happens for regular files, pipes and sockets...
Hmm... that may be a good idea, although for it seems to work on all of them,
I haven't checked for any kind of leak in the others, nor would truly expect
one. And pipes ARE fifo's aren't they?
>
> Bruce
>
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