Question about "kern/125239: [gre] kernel crash when using gre"

[Jeff Mo]

Hi Sir,

I am trying to dive deeper into the stack frames of  the following bug:
kern/125239: [gre] kernel crash when using greI use FreeBSD 7.0 and already
reproduce it, but I am not sure about what the following sentence means:
"ifp=Variable "ifp" is not available"?

I will be very thankful if anyone can give me some instruction.

Regards
Jeff

==================

(kgdb) f 7
#7  0xc082263b in in_ifinit (ccc.
) at /usr/src/sys/netinet/in.c:817
817                     if (rtinitflags(ia)) {
(kgdb) info f
Stack level 7, frame at 0xd22f3b58:
 eip = 0xc082263b in in_ifinit (/usr/src/sys/netinet/in.c:817);
    saved eip 0xc0823607
 called by frame at 0xd22f3bb8, caller of frame at 0xd22f3ad4
 source language c.
 Arglist at 0xd22f3b50, args: ifp=Variable "ifp" is not available.