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Date:      Mon, 21 Apr 1997 03:28:51 -0700
From:      David Greenman <dg@root.com>
To:        Simon Shapiro <Shimon@i-Connect.Net>
Cc:        freebsd-hackers@freebsd.org, freebsd-bugs@freebsd.org
Subject:   Re: Mystery of the X11 Panic... 
Message-ID:  <199704211028.DAA03554@root.com>
In-Reply-To: Your message of "Mon, 21 Apr 1997 00:31:25 PDT." <XFMail.970421005121.Shimon@i-Connect.Net> 

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>Running 2.2.1-970415 and later, shortly after starting X11, while clicking
...
>these problems.  the better news is that I managed to catch this panic
>while X11 was running:
>
>Fatal trap 12 - Page fault while in kernel mode. in virtual address
>0xf71e0014.  Tracing back shows that bash (?!) was the culprit, causing it
>after calling _Xsyscall -> _syscall -> _vm_open -> _spec_open.
>
>Things go south at _spec_open + 0x6e, complaining about cmpl $0,0(%eax).
>
>Now, I am a pretty good shell programmer, but never lerned how to panic a
>kernel with running a program on one :-)
>
>There is no explicit bash call on my part, to trigger the fault, but much
>of the X11 activity forks and exec's all over the place.  But you know that
>already...
>
>Anyway, any help will be appreciated...!  I must stabilize this kernel!!!

   This is almost certainly caused by the bug I fixed in kern_exec.c on April
18th. You say "-970415" and later...does this mean that you've updated your
source in the past day or so?

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project



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