Re: New struct sock_common breaks parisc 64 bit compiles with a misalignment

[Andi Kleen]

"David S. Miller" <[e-mail]> writes:

>    From: James Bottomley <[e-mail]>
>    Date: 15 Jun 2003 10:17:10 -0500
>    
>    It's not necessary and would, indeed, be detrimental to operation since
>    we'd generate alignment traps on almost every encapsulated protocol (at
>    several hundred instructions per trap).  If we do this, our network
>    performance will tank.
> 
> It doesn't happen for all the normal cases, but it does for
> things like IP in appletalk and stuff like that.

It can be remotely triggered in ordinary TCP. Just add an odd number of nops 
before a TCP timestamp to misalign it.

In short any linux parisc64 box on the net is very likely remotely 
panicable.

-Andi