Date: Tue, 18 Dec 2001 17:20:13 -0800 (PST) From: Giovanni Picoli Tirloni <tirloni@users.sourceforge.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/32995: Kernel panic (fatal trap 12): page fault while in kernel mode Message-ID: <200112190120.fBJ1KDK09636@freefall.freebsd.org>
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>Number: 32995
>Category: kern
>Synopsis: Kernel panic (fatal trap 12): page fault while in kernel mode
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Dec 18 17:30:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Giovanni Picoli Tirloni
>Release: 4.4-STABLE
>Organization:
BS2 Sistemas para Internet Ltda.
>Environment:
FreeBSD mink.ath.cx 4.4-STABLE FreeBSD 4.4-STABLE #1: Tue Dec 18 10:01:23 BRST 20001 root@mink.ath.cx:/usr/src/sys/compile/MINK i386
>Description:
After updating to 4.4-STABLE of day Dec 18 I recompiled world and kernel. All won't fine until the reboot. For some reason when any application tries to use some network related kernel function (I guess) the kernel panics. It happens just after I run ppp(8) because I've ntpdate in ppp.linkup or even if I'm not connected but I open Opera 5.05, which tries to open the home page, the kernel panics. In general, if I do anything related after tun0 is up. That doesn't happen with lo0 or any other device. I don't have ethernet support compiled, by the way. So I think it's something really related to a modification someone did in the networking stack or in ppp(8) itself. But crashing even when tun0 isn't up get me annoyed. I compiled the kernel many many times with and without optimizations (-O and -O3), removed some options like USER_LDT, LINUX, EXT2FS, PPP_DEFLATE, RANDOM_IP, etc with no luck.
My kernel config follows:
machine i386
cpu I586_CPU
ident MINK
maxusers 48
options COMPAT_LINUX
options INET
options EXT2FS
options FFS_ROOT
options SOFTUPDATES
options MSDOSFS
options CD9660
options PROCFS
options COMPAT_43
options UCONSOLE
options SYSVSHM
options SYSVMSG
options SYSVSEM
options P1003_1B
options _KPOSIX_PRIORITY_SCHEDULING
options KBD_INSTALL_CDEV
options TCP_DROP_SYNFIN
device isa
device pci
device fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
device ata0 at isa? port IO_WD1 irq 14
device ata1 at isa? port IO_WD2 irq 15
device ata
device atadisk
device atapicd
device atapifd
options ATA_STATIC_ID
device atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1 flags 0x1
device vga0 at isa?
options VESA
pseudo-device splash
device sc0 at isa? flags 0x100
device npx0 at nexus? port IO_NPX irq 13
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 3
pseudo-device loop
pseudo-device tun
pseudo-device pty
pseudo-device vn
pseudo-device ether
pseudo-device tap
pseudo-device snp
pseudo-device bpf
device pcm0
options IPFILTER
options IPFILTER_LOG
options IPFILTER_DEFAULT_BLOCK
options PPP_DEFLATE
options PPP_BSDCOMP
options RANDOM_IP_ID
options UFS_DIRHASH
My system is a Pentium 200Mhz MMX, 48M EDO RAM, 4G+2G+800M HDDs, Modem USR 56k v90/x2 ISA, No ethernet.
The same configurations stopped to work after the cvsup.
>How-To-Repeat:
Use a kernel (and world) from Tue Dec 18 2001 or so, get your tun0 iface up with ppp(8) and try any app that use that iface. I was unable to try with other iface types though.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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