Date: Tue, 18 Apr 2000 13:04:10 -0400 From: "Matthew Zahorik" <maz@albany.net> To: <alpha@freebsd.org> Subject: Re: HELP! Message-ID: <00ff01bfa958$1d7c3a00$1401eed8@mahatma> References: <00c501bfa955$203546e0$1401eed8@mahatma>
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A slight update. This works.
[shell1]:12:55pm:/etc# mv sshd_config sshd_config2
[shell1]:12:55pm:/etc# cp sshd_config2 /tmp
[shell1]:12:55pm:/etc# mv sshd_config2 sshd_config
[shell1]:12:55pm:/etc# cp sshd_config /tmp
[shell1]:12:56pm:/etc# _
Works fine. But, after the machine freshly reboots:
[shell1]:12:58pm:/etc# cp sshd_config /tmp
crashes instantly.
Weird, strange, and unusual.
sshd_config is copied in /etc/rc.local from /usr/local/etc/sshd_config with
this bit of code:
#!/bin/sh
cp /usr/local/etc/sshd_config /etc/sshd_config
ifconfig -a | grep inet | head -2 | awk '{printf("ListenAddress %s\n",$2);}'
\ >>/etc/sshd_config
cp /usr/local/etc/ssh_host_key /etc/ssh_host_key
/usr/local/sbin/sshd -f /etc/sshd_config
echo -n ' sshd'
- Matt
--
Matthew Zahorik Director of Systems and Networking - BiznessOnline.com
matt@thebiz.net President of AlbanyNet Inc. - a BiznessOnline subsidiary
maz@albany.net Voice: (518) 292-1001 Fax: (518) 626-0793
----- Original Message -----
From: "Matthew Zahorik" <matt@thebiz.net>
To: <alpha@freebsd.org>
Sent: Tuesday, April 18, 2000 12:42 PM
Subject: HELP!
: I have a reliable kernel panic when copying a file.
:
: These are diskless servers. /etc is a MFS filesystem. /sandbox/etc is
NFS
: mounted.
:
: [shell1]:DING~:~# cd /sandbox/etc
: [shell1]:12:00pm:/sandobx/etc# cp /etc/sshd_config .
:
: fatal kernel trap:
:
: trap entry = 0x2 (memory management fault)
: a0 = 0x0
: a1 = 0x1
: a2 = 0xffffffffffffffff
: pc = 0x0
: ra = 0x1
: curproc = 0xfffffe0011456e00
: pid = 338, comm = cp
:
: ddbprinttrap from 0x0
: ddbprinttrap(0x0, 0x1, 0xffffffffffffffff, 0x2)
: panic: trap
: panic
: Stopped at Debugger+0x2c: ldq ra,0(sp) <0xfffffe0012afd3f0>\
: <ra=0xfffffc00004abcc0,sp=0xfffffe0012afd3f0>
: db> trace
: Debugger() at Debugger+0x2c
: panic() at panic+0x100
: trap() at trap+0x610
: XentMM() at XentMM+0x20
: (null) at 0x1
: db>
:
: You can cat/more, ls -l, and otherwise manipulate the file. You can't
copy
: it for the life of me. (I haven't tried mv'ing it)
:
: I tried different destinations, like cp /etc/sshd_config /tmp and that
: still crashes.
:
: This was a 4.0-RELEASE kernel. I CVS'd out the current kernel (cd
/usr/src,
: cvs co sys) just a couple of moments ago and tried that - no change, so
it's
: not a bug that has a fix recently committed.
:
: These machines were really close to hitting production with FreeBSD
instead
: of Linux on them, but I can't have people rebooting the machines at will
(:
: Any pointers would be appreciated so I can fix this quickly.
:
: There's no PC, or any other address that points to the bad code, so I
really
: can't track it down. Something is getting a null pointer, and crashing.
: Since it's bringing down the machine, I assume it is in the kernel space.
(I
: assume a null pointer access in user space can't bring the machine down)
My
: gut tells me it's MFS related.
:
: I can't reproduce this on my Intel boxes - either the bug doesn't exist or
: the setup isn't identical.
:
: - Matt
:
: --
: Matthew Zahorik Director of Systems and Networking - BiznessOnline.com
: matt@thebiz.net President of AlbanyNet Inc. - a BiznessOnline subsidiary
: maz@albany.net Voice: (518) 292-1001 Fax: (518) 626-0793
:
:
:
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