On Thu, 7 May 2015, Peter Zijlstra wrote: > Indeed so; and we can make an analogous argument for hwc. However: > > > I think it is more likely related to the bitmask (idxmsk). But then > > it is always allocated with the constraint even with the HT bug > > workaround. So most, likely the index is bogus and you touch outside > > the idxmsk[] array. > > [428232.701319] BUG: unable to handle kernel NULL pointer dereference at > (null) > > But the thing really tried to touch NULL, not some random address that > faulted. > > As always, Vince has found us a good puzzle ;-)
and sorry I haven't been much help tracking it down. I'm trying to trigger it again, but this particular bug only pops up after a week or so of fuzzing. Vince -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
