From owner-freebsd-bugs  Thu Jul 11  9:10:13 2002
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Date: Thu, 11 Jul 2002 09:10:06 -0700 (PDT)
Message-Id: <200207111610.g6BGA6KW051224@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: "David Hedley" <david@inty.net>
Subject: Re: kern/33143: Kernel panic in uhci_abort_xfer_end
Reply-To: "David Hedley" <david@inty.net>
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The following reply was made to PR kern/33143; it has been noted by GNATS.

From: "David Hedley" <david@inty.net>
To: "freebsd-gnats-submit@FreeBSD. org" <freebsd-gnats-submit@FreeBSD.org>,
	<rv@openusenet.org>
Cc:  
Subject: Re: kern/33143: Kernel panic in uhci_abort_xfer_end
Date: Thu, 11 Jul 2002 17:05:34 +0100

 The second panic is caused in /sys/ufs/ffs/ffs_softdep.c:acquire_lock
 (i.e. soft updates are on):
 
 acquire_lock(lk)
         struct lockit *lk;
 {
         pid_t holder;
 
         if (lk->lkt_held !=3D -1) {
                 holder =3D lk->lkt_held;
                 FREE_LOCK(lk);
                 if (holder =3D=3D CURPROC->p_pid)
                         panic("softdep_lock: locking against myself");
                 else
                         panic("softdep_lock: lock held by %d", holder);
         }
         lk->lkt_spl =3D splbio();
 (*)        lk->lkt_held =3D CURPROC->p_pid;
         lockcnt++;
 }
 
 The second panic happens at the line indicated (*) when CURPROC =3D=3D =
 NULL (i.e. there is no current process)
 
 David
 --
 Dr David Hedley, R&D Director,
 intY Ltd, Bristol, UK
 http://www.inty.net/
 
 
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