linux-kernel - Re: [Bug fix PATCH v3] Reusing a resource structure allocated by bootmem

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]

Message-ID: <516E4C3F.8040302@jp.fujitsu.com>
Date:	Wed, 17 Apr 2013 16:16:15 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>, <toshi.kani@...com>,
	<linuxram@...ibm.com>, <linux-kernel@...r.kernel.org>,
	<linux-mm@...ck.org>
Subject: Re: [Bug fix PATCH v3] Reusing a resource structure allocated by
 bootmem

Hi David,

2013/04/17 15:52, David Rientjes wrote:
> On Wed, 17 Apr 2013, Yasuaki Ishimatsu wrote:
>
>>> How much memory are we talking about?
>>
>> Hmm. I don't know correctly.
>>
>> Here is kernel message of my system. The message is shown by mem_init().
>>
>
> Do you have an estimate on the amount of struct resource memory that will
> be leaked if entire pages won't be freed?
>

I roughly estimated amount of memory which will leak as follows:

$ wc -l /proc/ioports
92 /proc/ioports
$ wc -l /proc/iomem
226 /proc/iomem

In my system, number of resource structures are 318 and
sizeof(struct resource) is 56 bytes. So even if all resource
structures are leaked, the size is 17 KiB.

Thanks,
Yasuaki Ishimatsu

--
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/