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Date:      Mon, 15 Mar 1999 01:04:30 +0300
From:      Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        current@FreeBSD.ORG
Subject:   Re: Simple DOS against 3.x locks box solid 
Message-ID:  <199903142204.BAA03697@tejblum.dnttm.rssi.ru>
In-Reply-To: Your message of "Thu, 04 Mar 1999 23:06:28 PST." <199903050706.XAA38141@apollo.backplane.com> 

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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?

Dima




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