linux-kernel - Re: [PATCH 02/35] UBI: Fix stale pointers in ubi->lookuptbl

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Date:	Thu, 04 Dec 2014 14:37:52 +0200
From:	Tanya Brokhman <tlinder@...eaurora.org>
To:	Richard Weinberger <richard@....at>, dedekind1@...il.com
CC:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/35] UBI: Fix stale pointers in ubi->lookuptbl

On 12/4/2014 1:04 PM, Richard Weinberger wrote:
> Tanya,
>
> Am 04.12.2014 um 12:00 schrieb Tanya Brokhman:
>> Hi Richard
>>
>> On 10/29/2014 2:45 PM, Richard Weinberger wrote:
>>> In some error paths the WL sub-system gives up on a PEB
>>> and frees it's ubi_wl_entry struct but does not set
>>> the entry in ubi->lookuptbl to NULL.
>>> Fastmap can stumble over such a stale pointer as it uses
>>> ubi->lookuptbl to find all PEBs.
>>>
>>> Fix this by setting the pointers to free'd ubi_wl_entry to NULL.
>>
>> There are 2 more places:
>> tree_destroy() and protection_queue_destroy() where ubi_wl_entry is released. Both functions used on power down so all should be good as is, just wanted to make sure you didn't add
>> ubi->lookuptbl[e2->pnum] = NULL there on purpose.
>
> I fear you're looking at the old patch series.
> Please have a look at:
> "[PATCH 3/6] UBI: Fix stale pointers in ubi->lookuptbl" sent on 30.11.2014.
>
> Thanks,
> //richard
>

oh, you're right. Started from the oldest. now I see you released v2. 
Sorry. So I should be looking at "Fastmap update v2 (pile 1-7)", right?

Thanks,
Tanya Brokhman
-- 
Qualcomm Israel, on behalf of Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
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