[Click] Memory allocation in Click elements

[Grzegorz Adamski]

Hi,
I'm trying to allocate large amount of memory in one of my elements (30
- 40 MBs). And while everything works fine in user mode, I can't make
the kernel driver to work. First I tried declaring a static table, later
I tried allocating memory for the table dynamically, but every time I
run the router I get the following error messages from the kernel:

kernel: click: starting router thread pid 3258 (d9beb940)
kernel: Unable to handle kernel NULL pointer dereference at virtual
address 00000000
kernel:  printing eip:
kernel: dca45db8
kernel: *pde = 18f31067
kernel: *pte = 00000000
kernel: Oops: 0002
kernel: CPU:    0
kernel: EIP:    0010:[<dca45db8>]    Not tainted
kernel: EFLAGS: 00013202
kernel: eax: 00000000   ebx: 00000000   ecx: 007a1204   edx: 00000004
kernel: esi: d51c3cc0   edi: 00000001   ebp: c8a3bf3c   esp: c8a3bed4
kernel: ds: 0018   es: 0018   ss: 0018
kernel: Process kclick (pid: 3258, stackpage=c8a3b000)
kernel: Stack: 00200096 c0374470 0000000e 00000004 c14de800 20000001
c8a3bf38 0000000e
kernel:        c0108845 d8b58000 c8a3a000 da556540 c0111d2a c8a3bf3c
d3fa2ec0 d5e46000
kernel:        00000000 dc8e8000 00002000 d3fa2ec0 c8a3a000 00000000
c034dd80 d51c3cc0
kernel: Call Trace:    [<c0108845>] [<c0111d2a>] [<dc9f05df>]
[<dca3dfed>] [<dca046a0>]
kernel:   [<dca65e0e>] [<c010577e>] [<dca65d90>]
kernel:
kernel: Code: c7 00 40 42 0f 00 89 d3 bf 3f 42 0f 00 8d 76 00 83 ec 0c
53

Any suggestions as to the cause of the problem? Is there any "special"
way to allocate memory for the kernel driver module (for now I'm using
"new").
Thanks
Greg Adamski