From owner-freebsd-current  Tue Jun  5  3:26:39 2001
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Date: Tue, 05 Jun 2001 12:21:46 +0200
From: Daniel Rock <D.Rock@t-online.de>
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To: current@freebsd.org
Subject: panic in procfs code
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Hi,

I just noticed: Doing a simple "cat /proc/$$/map" panics the system:

kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc01f9ec3
stack pointer           = 0x10:0xc6eefccc
frame pointer           = 0x10:0xc6eefcd8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 35 (cat)
kernel: type 12 trap, code=0
Stopped at      _mtx_unlock_sleep+0xa3: cmpl    $0,0(%ebx)
db> t
_mtx_unlock_sleep(c049c9c0,0,c03b01a0,f2) at _mtx_unlock_sleep+0xa3
lockmgr(c55fadb0,10001,c049c9c0,c55f4100) at lockmgr+0x9d
procfs_domap(c55f4100,c55f4320,c0c90da0,c6eefefc,c0cc3180) at
procfs_domap+0x88
procfs_rw(c6eefe8c,c55f4100,c6eeff80,400,0) at procfs_rw+0x158
vn_read(c0cc3180,c6eefefc,c09abe00,0,c55f4100) at vn_read+0x118
dofileread(c55f4100,c0cc3180,3,805b000,400) at dofileread+0xb0
read(c55f4100,c6eeff80,bfbffc94,3,1) at read+0x36
syscall(2f,2f,2f,1,3) at syscall+0x3fd
syscall_with_err_pushed() at syscall_with_err_pushed+0x1b


Is it just my setup or a general problem? If it happens only on my
system I can give further details.


Daniel

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