linux-kernel - Re: [-mm PATCH] register_memory/unregister

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: <20080211114818.74c9dcc7.akpm@linux-foundation.org>
Date:	Mon, 11 Feb 2008 11:48:18 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Badari Pulavarty <pbadari@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, greg@...ah.com, haveblue@...ibm.com,
	linux-mm@...ck.org
Subject: Re: [-mm PATCH] register_memory/unregister_memory clean ups

On Mon, 11 Feb 2008 09:23:18 -0800
Badari Pulavarty <pbadari@...ibm.com> wrote:

> Hi Andrew,
> 
> While testing hotplug memory remove against -mm, I noticed
> that unregister_memory() is not cleaning up /sysfs entries
> correctly. It also de-references structures after destroying
> them (luckily in the code which never gets used). So, I cleaned
> up the code and fixed the extra reference issue.
> 
> Could you please include it in -mm ?
> 
> Thanks,
> Badari
> 
> register_memory()/unregister_memory() never gets called with
> "root". unregister_memory() is accessing kobject_name of
> the object just freed up. Since no one uses the code,
> lets take the code out. And also, make register_memory() static.  
> 
> Another bug fix - before calling unregister_memory()
> remove_memory_block() gets a ref on kobject. unregister_memory()
> need to drop that ref before calling sysdev_unregister().
> 

I'd say this:

> Subject: [-mm PATCH] register_memory/unregister_memory clean ups

is rather tame.  These are more than cleanups!  These sound like
machine-crashing bugs.  Do they crash machines?  How come nobody noticed
it?

All very strange...


--
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/