linux-kernel - Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <49A1B538.7090107@gmail.com>
Date:	Sun, 22 Feb 2009 21:27:36 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Sitsofe Wheeler <sitsofe@...oo.com>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Slaby <jirislaby@...il.com>, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org, ath5k-devel@...ema.h4ckr.net,
	Nick Kossifidis <mickflemm@...il.com>,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>,
	Bob Copeland <me@...copeland.com>
Subject: Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc)

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/