linux-kernel - Re: [PATCH 3.7-rc8] ttm: Fix possible

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Message-ID: <50C124B7.4070502@canonical.com>
Date:	Thu, 06 Dec 2012 16:05:27 -0700
From:	Tim Gardner <tim.gardner@...onical.com>
To:	Dave Airlie <airlied@...il.com>
CC:	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	dri-devel@...ts.freedesktop.org,
	David Howells <dhowells@...hat.com>,
	Dave Airlie <airlied@...hat.com>
Subject: Re: [PATCH 3.7-rc8] ttm: Fix possible _manager memory allocation
 oops

On 12/06/2012 03:46 PM, Dave Airlie wrote:

>>
>>          ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
>>
>> @@ -817,6 +821,7 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
>>                                     &glob->kobj, "pool");
>>          if (unlikely(ret != 0)) {
>>                  kobject_put(&_manager->kobj);
>> +               kfree(_manager);
>>                  _manager = NULL;
>
> I don;t think this is, since the kobject_put shuold free it.
>

kobject_put only frees memory referenced by kobj, but not the memory 
pointed at by _manager.

rtg
-- 
Tim Gardner tim.gardner@...onical.com
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