From owner-freebsd-stable@FreeBSD.ORG  Fri Mar 11 06:59:56 2005
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Date: Thu, 10 Mar 2005 22:59:55 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: Mars Trading <marstrade@gmail.com>
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cc: freebsd-stable@freebsd.org
Subject: Re: Problem Report usb/77294
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On Fri, 11 Mar 2005, Mars Trading wrote:

>
> Forgot to mention what it's all about in my previous message. Sorry
> 'bout that.
>
> It has to do with uplcom+ucom panic. Description follows:
>
> I get reproducable panic()s that look like a NULL pointer
> dereference.
>
> What I saw on the console:
>
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
> putc to a clist with no reserved blocks
>
> ucom1: read start failed
>
> fatal trap 12 in kernel mode
> fault virtual address = 0x4c
> [ ... ]

Please don't truncate trap messages. The data in there is useful.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org