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Date: Tue, 4 Oct 2016 07:23:55 +0000
From: "Reshetova, Elena" <elena.reshetova@...el.com>
To: David Windsor <dwindsor@...il.com>, Kees Cook <keescook@...omium.org>
CC: "kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>, Hans Liljestrand <ishkamiel@...il.com>
Subject: RE: [RFC PATCH 01/13] Add architecture independent hardened atomic
base
>I start to believe that we have a mismatch of terms here.
>Strictly speaking underflow is not defined for non-floating point numbers, so since we are dealing here with ints and longs, when both of them approach zero and then wrap around, it is treated as overflow (just in a different direction than when it approaches LONG_MAX or LONG_MIN).
Correction: " when both of them approach INT_MIN and LONG_MIN (I am constantly making this mistake when explaining this, my brain doesn't like signed integers) and then wrap around ".
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