get the ipv6 source address
 

I need to get the ipv6 source address at the kernel level (Debian machine).
what is the eroor with this?

code:
struct ipv6_pinfo *np = inet_sk(sk);
addr = np->saddr;

What error are you getting?

in fact i am making changes in the kernel tcp stack in file tcp_output.c, and i am using the ipv6 source address to inject in the tcp header.
after recompiling the kernel, when i launch the browser epiphany, i get a kernel failure message:

BUG: unable to handle kernel NULL pointer dereference...

Thanks