netdev - Re: [Security] [PATCH v4] drivers/net/tulip/de4x5.c: fix union member name in DE4X5_GET

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: <20100917063602.GA2341@1wt.eu>
Date:	Fri, 17 Sep 2010 08:36:02 +0200
From:	Willy Tarreau <w@....eu>
To:	David Miller <davem@...emloft.net>
Cc:	drosenberg@...curity.com, security@...nel.org,
	grundler@...isc-linux.org, netdev@...r.kernel.org, jeffm@...e.com,
	linux-kernel@...r.kernel.org, kyle@...artin.ca
Subject: Re: [Security] [PATCH v4] drivers/net/tulip/de4x5.c: fix union member name in DE4X5_GET_REG ioctl

On Thu, Sep 16, 2010 at 10:34:41PM -0700, David Miller wrote:
> From: Dan Rosenberg <drosenberg@...curity.com>
> Date: Fri, 17 Sep 2010 01:30:36 -0400
> 
> > Tiring doesn't begin to describe it.  Formatting undamaged.
> 
> :-)  Thanks.
> 
> > This was previously reported as a security issue due to leakage of
> > uninitialized stack memory.  Jeff Mahoney pointed out that this is
> > incorrect since the copied data is from a union (rather than a struct).
> > Therefore, this patch is only under consideration for the sake of
> > correctness, and is not security relevant. 
> > 
> > Signed-off-by: Dan Rosenberg <dan.j.rosenberg@...il.com>
> > Acked-by: Grant Grundler <grundler@...isc-linux.org>
> 
> Applied.

David, just for the record, as was already reported on the list, this
fix is finally more a cleanup than a security fix because "tmp" is a
union and not a struct, so tmp.addr == tmp.lval.

Regards,
Willy

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html