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Message-ID: <49A1B538.7090107@gmail.com>
Date: Sun, 22 Feb 2009 21:27:36 +0100
From: Jiri Slaby <jirislaby@gmail.com>
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To: Sitsofe Wheeler <sitsofe@yahoo.com>
CC: Frederic Weisbecker <fweisbec@gmail.com>, Jiri Slaby <jirislaby@gmail.com>,
       linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org,
       ath5k-devel@venema.h4ckr.net, Nick Kossifidis <mickflemm@gmail.com>,
       "Luis R. Rodriguez" <lrodriguez@atheros.com>,
       Bob Copeland <me@bobcopeland.com>
Subject: Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc)
References: <20090222111807.GB5538@silver.sucs.org> <49A13E91.1090601@gmail.com> <20090222122036.GC5538@silver.sucs.org> <20090222144742.GA6078@nowhere> <20090222170201.GA27360@silver.sucs.org> <20090222171032.GD6003@nowhere> <49A1A72A.50102@gmail.com> <20090222194236.GA6060@nowhere> <20090222201821.GA21375@silver.sucs.org>
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On 22.2.2009 21:18, Sitsofe Wheeler wrote:
> This case is more
> coarse as it only deals with allocation rather than initialisation (and
> if you scribble the same value as the poison pattern you go undetected)

This is false negative, yes.

> but I believe this is what Jiri is referring to as a "no false positive
> possibility" case - it's never right to write to unallocated memory.

Exactly, thanks.