Re: Frequent kernel panic with compat_linux module

[David Laight <david%l8s.co.uk@localhost>]

On Wed, Dec 10, 2008 at 01:35:26AM +0100, Nicolas Joly wrote:
> 
>         l->l_sysent = sy;
>         error = (*sy->sy_call)(l, uap, rval);
>     ca2f:       48 89 e2                mov    %rsp,%rdx
>     ca32:       48 89 ab 08 03 00 00    mov    %rbp,0x308(%rbx)
>     ca39:       4c 89 e6                mov    %r12,%rsi
>     ca3c:       48 89 df                mov    %rbx,%rdi
>     ca3f:       ff 55 08                callq  *0x8(%rbp)
>         l->l_sysent = NULL;
>     ca42:       48 c7 83 08 03 00 00    movq   $0x0,0x308(%rbx)       <----
>     ca49:       00 00 00 00 

Well, %rbx is supposed to be caller-saved and must have been valid
at address ca32.  So something must be trashing it!

Did you work out which system call(s) were active?

        David

-- 
David Laight: david%l8s.co.uk@localhost