Date: Mon, 15 Mar 1999 08:13:15 +0000 (GMT) From: Doug Rabson <dfr@nlsystems.com> To: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru> Cc: Matthew Dillon <dillon@apollo.backplane.com>, current@freebsd.org Subject: Re: Simple DOS against 3.x locks box solid Message-ID: <Pine.BSF.4.05.9903150812150.47099-100000@herring.nlsystems.com> In-Reply-To: <199903142204.BAA03697@tejblum.dnttm.rssi.ru>
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On Mon, 15 Mar 1999, Dmitrij Tejblum wrote:
> Matthew Dillon wrote:
> > - error = acquire(lkp, extflags,
> > - LK_HAVE_EXCL | LK_WANT_EXCL | LK_WANT_UPGRADE);
> > + if (p->p_flag & P_DEADLKTREAT) {
> > + error = acquire(
>
> This is broken: p may be NULL, it is checked several lines before.
> My kernel just paniced for this reason.
>
> Well, sorry for late response, but: what was wrong with Tor Egge's
> "workaround" from kern/8416?
I'm almost relieved. I had a report of this on the alpha and I thought it
might be alpha-specific.
--
Doug Rabson Mail: dfr@nlsystems.com
Nonlinear Systems Ltd. Phone: +44 181 442 9037
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