[Crash-utility] crash: struct command can read irrelevant pages.

[Dave Anderson]

----- Original Message -----
> >Hello Atsushi,
> >
> >I've committed a SLAB/SLUB kmem_cache-specific fix for this issue:
> >
> >  https://github.com/crash-utility/crash/commit/c0b7a74fc13121203810d06d163550436b2d5476
> >
> >which is queued for crash-7.0.6.
> 
> Thanks Dave, I made sure that this patch solved my problem.

OK good, thanks.
 
> >> This is a "known" issue has been discussed on the crash-utility list in the
> >> past, at least with respect to the kmem_cache data structure.  But for any random
> >> data structure that has such a construct, I'm not sure what can be done.
> 
> I also have no ideas how to solve it, but it seems that it hasn't been a
> practical problem yet. So I think your patch is enough for now.

At least with compressed kdumps, the "crash --zero_excluded" command line option,
or "set zero_excluded on" during runtime, should handle 99% of the cases.

Dave