5.1-RELEASE-p2 daily panic

[Brandon Weisz]

(please CC as I'm not subscribed)

Not sure if freebsd-stable@ is the correct list as this is
5.1-RELEASE-p2.  Seems to have started after rebuild for -p2 patches. 
The box was quite stable before then.

This is very easy to reproduce.  It happens daily just before 24 hrs
uptime. 

FreeBSD edge.internal 5.1-RELEASE-p2 FreeBSD 5.1-RELEASE-p2 #0: Sat Aug
30 13:07:49 CDT 2003 bweisz at edge.internal:/usr/obj/usr/src/sys/TESTBED 
i386

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x71e51224
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc03809e7
stack pointer           = 0x10:0xd8e28b28
frame pointer           = 0x10:0xd8e28b80
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         = 560 (rtadvd)
kernel: type 12 trap, code=0
Stopped at      sysctl_iflist+0x197:    movzwl  0x24(%eax),%eax
db> trace
sysctl_iflist(0,d8e28b98,e,51d600,98) at sysctl_iflist+0x197
sysctl_rtsock(c054db20,d8e28cb0,4,d8e28c0c,d8e28c0c) at
sysctl_rtsock+0x111
sysctl_root(0,d8e28ca8,6,d8e28c0c,c150e390) at sysctl_root+0x12a
userland_sysctl(c150e390,d8e28ca8,6,0,bfbffa9c) at userland_sysctl+0x14d
__sysctl(c150e390,d8e28d10,c050a6b5,3fb,6) at __sysctl+0xb0
syscall(bfbf002f,bfbf002f,bfbf002f,0,bfbffa9c) at syscall+0x24e
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x280be943, esp =
0xbfbff9ec,
ebp = 0xbfbffa18 ---
db> panic
panic: from debugger
Debugger("panic")


Fatal trap 3: breakpoint instruction fault while in kernel mode
instruction pointer     = 0x8:0xc047eb34
stack pointer           = 0x10:0xd8e288a8
frame pointer           = 0x10:0xd8e288b4
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = IOPL = 0
current process         = 560 (rtadvd)
Stopped at      sysctl_iflist+0x197:    movzwl  0x24(%eax),%eax
db> trace
sysctl_iflist(0,d8e28b98,e,51d600,98) at sysctl_iflist+0x197
sysctl_rtsock(c054db20,d8e28cb0,4,d8e28c0c,d8e28c0c) at
sysctl_rtsock+0x111
sysctl_root(0,d8e28ca8,6,d8e28c0c,c150e390) at sysctl_root+0x12a
userland_sysctl(c150e390,d8e28ca8,6,0,bfbffa9c) at userland_sysctl+0x14d
__sysctl(c150e390,d8e28d10,c050a6b5,3fb,6) at __sysctl+0xb0
syscall(bfbf002f,bfbf002f,bfbf002f,0,bfbffa9c) at syscall+0x24e
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x280be943, esp =
0xbfbff9ec,
ebp = 0xbfbffa18 ---
db> panic
panic: from debugger
Uptime: 23h53m18s