Re: Ugly rmap NULL ptr deref oopsie on hibernate (was Linux 2.6.34-rc3)

From: Paulo Marques
Date: Wed Apr 07 2010 - 10:06:01 EST

Linus Torvalds wrote:
> [...]
> So it once more is 'anon_vma->' that is crap, but now it's not
> NULL, it's that very odd 0x002e2e2e002e2e2e pattern (the %r13 has had 0x20
> subtracted from it, so that LSB of "0x0e" is actually _also_ a 0x2e).
> What does '0x2e' mean? It's ASCII '.', but that doesn't really mean
> anything either.

Just a wild shot in the dark: it can be a couple of gray pixels with
intensity 0x2e at some 32 bits per pixel mode. I say this because of the
zero bytes there and someone mentioning seeing the problem when starting X.

Paulo Marques -

"Don't worry, you'll be fine; I saw it work in a cartoon once..."
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