I am seeing this on one of my boxes with current net-2.6 tree.
Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
00000000
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: evdev e100 skge mii
CPU: 1
EIP: 0060:[<00000000>] Not tainted VLI
EFLAGS: 00010286 (2.6.12-rc1-tcp)
EIP is at 0x0
eax: c0413b6c ebx: 00000001 ecx: 0000000f edx: f6aa9000
esi: 000007d0 edi: fffc727d ebp: f6aa9d14 esp: f6aa9d00
ds: 007b es: 007b ss: 0068
Process ip (pid: 1597, threadinfo=f6aa9000 task=f64d3020)
Stack: c02fb6ce 00000001 f60022d0 f5fdd740 f6fc1300 f6aa9d70 c0331765 f6aa9d5c
c0000000 fffffff0 00000000 000000d0 f6aa9d44 00000246 0100007f 00aa9d88
00000002 00000020 f7f7da80 00000000 f6fc1300 f6aa9dd8 f7f7d780 ffffff97
Call Trace:
[<c0103ec6>] show_stack+0xa6/0xb0
[<c0104042>] show_registers+0x152/0x1c0
[<c010424d>] die+0xed/0x170
[<c011593d>] do_page_fault+0x4fd/0x685
[<c0103b33>] error_code+0x2b/0x30
[<c0331765>] fn_hash_insert+0x205/0x420
[<c032e9e6>] fib_magic+0x106/0x120
[<c032ea66>] fib_add_ifaddr+0x66/0x160
[<c032ed7c>] fib_inetaddr_event+0x1c/0x60
[<c0129fa8>] notifier_call_chain+0x28/0x50
[<c0326eb9>] inet_insert_ifa+0xd9/0x170
[<c03280ec>] inetdev_event+0x1dc/0x1f0
[<c0129fa8>] notifier_call_chain+0x28/0x50
[<c02e7ecf>] dev_open+0x5f/0x90
[<c02e94d2>] dev_change_flags+0x52/0x120
[<c03279d0>] devinet_ioctl+0x520/0x5d0
[<c0329968>] inet_ioctl+0x98/0xe0
[<c02df470>] sock_ioctl+0x1a0/0x250
[<c016dc36>] do_ioctl+0x76/0x90
[<c016ddcd>] vfs_ioctl+0x5d/0x1e0
[<c016df89>] sys_ioctl+0x39/0x60
[<c0103033>] sysenter_past_esp+0x54/0x75
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