Re: PATCH - bug in vfree

[Neil Booth <NeilB@earthling.net>]

Andrea Arcangeli wrote:

> Hmm, when I checked it one year ago I didn't seen a way the bug could
> corrupt memory.

Yes, you missed my retraction of that bit below.

Neil.

Neil Booth wrote:
> 
> Neil Booth wrote:
> 
> > More deeply:- Close inspection of get_vm_area reveals that
> > (intentionally?) it does NOT insist there be a cushion page behind a VMA
> > that is placed in front of a previously-allocated VMA, it ONLY
> > guarantees that a cushion page lies in front of newly-allocated VMAs.
> 
> Sorry, this is not correct (mistook < for <=). The bug report is
> correct, though.
> 
> Neil.
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