From: Patrick McHardy <[EMAIL PROTECTED]>
Date: Tue, 20 Nov 2007 13:24:17 +0100

> I now understand whats happening:
> 
> - new connection is allocated without helper
> - connection is REDIRECTed to localhost
> - nf_nat_setup_info adds NAT extension, but doesn't initialize it yet
> - nf_conntrack_alter_reply performs a helper lookup based on the
>    new tuple, finds the SIP helper and allocates a helper extension,
>    causing reallocation because of too little space
> - nf_nat_move_storage is called with the uninitialized nat extension
> 
> So your fix is entirely correct, thanks a lot :)

Great, I've applied Evgeniy's patch.
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