linux-kernel - Re: [PATCH] resource: Fix the case of null pointer access

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] [day] [month] [year] [list]

Date:	Tue, 12 Aug 2014 19:38:06 +0200
From:	Richard Weinberger <richard@....at>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Walter <sahne@...0.at>,
	Toralf Förster <toralf.foerster@....de>,
	user-mode-linux-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: Re: [PATCH] resource: Fix the case of null pointer access

Am 12.08.2014 17:04, schrieb Vivek Goyal:
> On Tue, Aug 12, 2014 at 04:49:35PM +0200, Richard Weinberger wrote:
>> Am 12.08.2014 16:46, schrieb Vivek Goyal:
>>> Richard and Daniel reported that UML is broken due to changes to resource
>>> traversal functions. Problem is that iomem_resource.child can be null
>>> and new code does not consider that possibility. Old code used a for loop
>>> and that loop will not even execute if p was null.
>>>
>>> Revert back to for() loop logic and bail out if p is null.
>>>
>>> I also moved sibling_only check out of resource_lock. There is no
>>> reason to keep it inside the lock.
>>>
>>> Following is backtrace of the UML crash.
>>
>> Shall I pickup this patch and route it via my uml tree to Linus?
> 
> I am fine with that. 

Whoops, I oversaw that your patch does not touch anything in arch/um/.
It is not UML specific. Let's see what Andrew says.

Thanks,
//richard
--
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/