Re: NULL pointer dereference when loading the gre module (3.10.0-rc4)

Steinar H. Gunderson
2013-06-07T18:34:46Z

On Fri, Jun 07, 2013 at 02:26:08PM -0400, Steven Rostedt wrote:
> On Fri, 2013-06-07 at 19:52 +0200, Steinar H. Gunderson wrote:
> Ah, that's because of this: module_init(ipgre_init); Where it makes it
> into:
>
> 00000000 <init_module>:
> 0: 55 push %ebp
> 1: 89 e5 mov %esp,%ebp
> 3: 53 push %ebx
> 4: 83 ec 08 sub $0x8,%esp
> 7: c7 04 24 00 00 00 00 movl $0x0,(%esp)
> a: R_386_32 .rodata.str1.4
>
> We can use ipgre_tap_init_net, and the offset of 0xb032 (45106) as that
> was 0xffffffffa0e5d034 - 0xffffffffa0e52002. Do you have CONFIG_NET_NS
> set?

ipgre_tap_init_net is 000000000000001a, but there's no way I can subtract
0xb053 from that? Sorry, I'm confused. :-)

> You can also cat /proc/modules. It gives you where the modules are
> located.

I've booted back to 3.9.x already; I couldn't live with a crashing kernel like
that. Unfortunately it's not that easy for me to reboot this machine all the
time either. :-/