[Xen-devel] [PATCH 1/5] tools/xc_restore: Initialise console and store mfns

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Andrew Cooper writes ("[PATCH 1/5] tools/xc_restore: Initialise console and 
store mfns"):
> If the console or store mfn chunks are not present in the migration stream,
> stack junk gets reported for the mfns.
> 
> XenServer had a very hard to track down VM corruption issue caused by exactly
> this issue.  Xenconsoled would connect to a junk mfn and incremented the ring
> pointer if the junk happend to look like a valid gfn.

A question that arises here is this:

How come this was going undetected ?

If the junk mfn _doesn't_ look like a valid gfn (which presumably it
mostly doesn't), surely this generates some error message somewhere
(even if it only causes the console not to work) ?

Ian.

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