vax decoding of indexed addressing mode

[Alan Modra]

On Fri, Dec 13, 2019 at 09:17:28PM +1030, Alan Modra wrote:
> This patch prevents print_insn_mode recursing into another index mode
> byte, which if repeated enough times will overflow private.the_buffer
> and scribble over other memory.  Found by our fuzzing friends.
> 
> OK?
> 
> 	* vax-dis.c (print_insn_mode): Stop index mode recursion.

I'm going to apply the patch since I'm reasonably certain it's good.

-- 
Alan Modra
Australia Development Lab, IBM