linux-kernel - Re: [PATCH] staging: tidspbridge: protect dmm

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20110312173626.GC24981@kroah.com>
Date:	Sat, 12 Mar 2011 09:36:26 -0800
From:	Greg KH <greg@...ah.com>
To:	Omar Ramirez Luna <omar.ramirez@...com>
Cc:	l-m <linux-kernel@...r.kernel.org>,
	Felipe Contreras <felipe.contreras@...ia.com>,
	l-o <linux-omap@...r.kernel.org>,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Fernando Guzman Lugo <fernando.lugo@...com>,
	Tuomas Kulve <tuomas@...ve.fi>
Subject: Re: [PATCH] staging: tidspbridge: protect dmm_map properly

On Fri, Mar 11, 2011 at 06:29:06PM -0600, Omar Ramirez Luna wrote:
> Hi Greg,
> 
> Please consider to apply this patch in the staging tree, as the
> description says it fixes a crash in tidspbridge driver, this bug
> was already present but it seems to have surfaced by recent tests
> made by Felipe and Tuomas.
> 
> It is an urgent fix for 2.6.38.

Heh, it's funny to see such a "urgent" fix take so long to get to me :)

Is it also applicable for .37?

> More on this discussion:
> http://www.gossamer-threads.com/lists/linux/kernel/1351446
> 
> Thanks,
> - omar
> 
> From: Felipe Contreras <felipe.contreras@...ia.com>
> 
> We need to protect not only the dmm_map list, but the individual
> map_obj's, otherwise, we might be building the scatter-gather list with
> garbage. So, use the existing proc_lock for that.
> 
> I observed race conditions which caused kernel panics while running
> stress tests, also, Tuomas Kulve found it happening quite often in
> Gumstix Over. This patch fixes those.
> 
> Cc: Tuomas Kulve <tuomas@...ve.fi>
> Signed-off-by: Felipe Contreras <felipe.contreras@...ia.com>
> Signed-off-by: Omar Ramirez Luna <omar.ramirez@...com>

How about I send it to Linus for .39 and then add it to the .38-stable
tree when it comes out?

thanks,

greg k-h
--
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/