RE: FW: i386 Linux kernel DoS (clarification)

Alan Cox (alan@lxorguk.ukuu.org.uk)
13 Nov 2002 21:10:14 +0000

On Wed, 2002-11-13 at 20:36, Petr Vandrovec wrote:
> 2.5.47-current-bk, run as mere user: Kernel panic: Attempted to kill init!
> Next time I'll trust you.

It does the lcall
The lcall takes an exception
The exception (TF) has NT set
iret returns via the task linkage

I think just clearing the NT bit in both lcall path _and_ in the TF
exception handler does the trick.

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