Date: Mon, 30 Oct 2000 13:34:01 +0900 From: Mamoru Iwaki <iwaki@bc.niigata-u.ac.jp> To: stable@FreeBSD.ORG Subject: linprocfs causes system down and reboot Message-ID: <20001030043402.1512.qmail@pikachu.bsp.bc.niigata-u.ac.jp> References: <20001028040054.23707.qmail@pikachu.bsp.bc.niigata-u.ac.jp> <86vgud61zd.wl@ringo.FromTo.Cc> <200010280502.e9S52tB14324@mail.airnet.ne.jp>
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Using linprocfs on 4.1.1-STABLE system,
% cat /compat/linux/proc/stat
or
% cat /compat/linux/proc/uptime
cause a panic with the following message
Fatal trap 18: integer divide fault while in kernel mode
instruction pointer = 0x8:0xc0933030
stack pointer = 0x10:0xc60dddc8
frame pointer = 0x10:0xc60dde20
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 325 (cat)
interrupt mask = none
trap number = 18
panic: integer divide fault
and then the system reboots immediately. At least, this problem has
exist since 4.1.1-STABLE around 24 Oct., but around 17 Oct..
This is dangerous because every user can make system down easily.
I heard that the CURRENT around 28 Oct. works good with the same
operations, so this problem maybe exist only in 4.1.1-STABLE.
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Mamoru IWAKI (iwaki@bc.niigata-u.ac.jp)
Graduate School of Science and Technology, Niigata University
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