Date: Wed, 13 Nov 2002 15:21:16 -0500 From: Girish Chandran <gchandran@newtecamerica.com> To: freebsd-bugs@FreeBSD.org Subject: Kernel panic: Dummynet and Bridging 4.6-stable Message-ID: <3DD2B43C.9040507@newtecamerica.com>
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I am using the 4.6 stable kernel.
I compiled a kernel (call it Kernel A) with firewalling and bridging
options.
options BRIDGE
options IPFIREWALL
options IPFIREWALL_VERBOSE
options IPFIREWALL_VERBOSE_LIMIT=10
Bridging appears to work fine.
(
net.link.ether.bridge=1
net.link.ether.bridge_ipfw=1
net.link.ether.bridge_cfg=fxp0:0,em0:0
)
Then I added
options DUMMYNET
and compiled the kernel (call it Kernel B) again.
Kernel panic with automatic reboots. Here is the error message
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x10
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0229f5b
stack pointer = 0x10:0xcdcdfdfc
frame pointer = 0x10:0xcdcdfe08
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 = 47 (sysctl)
interrupt mask = none
trap number = 12
panic: page fault
syncing disks... 8 3 2 1
done
Uptime: 28s
Automatic reboot in 15 seconds ...
I also noticed that during boot (before the kernel panic) there are a
set of messages with
can't re-use a leaf (bridge_xxx)
can't re-use a leaf (bridge_yyy)
can't re-use a leaf (bridge_zzz)
....
I did not see these messages with a kernel A.
Then I booted using Kernel A, commented out the sysctl variables for
bridging.
Then I booted using Kernel B. Kernel B now boots fine.
Any suggestions?
Thanks
Girish Chandran
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