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From: Alexander Wetzel <alexander@wetzel-home.de>
To: Guenter Roeck <linux@roeck-us.net>, Wen Gong <quic_wgong@quicinc.com>
Cc: johannes@sipsolutions.net, ath11k@lists.infradead.org,
	linux-wireless@vger.kernel.org
Subject: Re: [PATCH] wifi: mac80211: change initialize for sk_buff in ieee80211_tx_dequeue()
Date: Mon, 9 Jan 2023 15:22:22 +0100	[thread overview]
Message-ID: <3372b42f-b9bf-20e8-35f9-5370571a9e35@wetzel-home.de> (raw)
In-Reply-To: <d28c6340-7ad2-d7f6-939d-3a1a057cb7da@wetzel-home.de>

On 09.01.23 15:05, Alexander Wetzel wrote:
> On 05.01.23 06:26, Guenter Roeck wrote:
>> On Mon, Dec 12, 2022 at 03:36:07AM -0500, Wen Gong wrote:
>>> The sk_buff is only set to NULL when initialize, sometimes it will goto
>>> label "begin" after ieee80211_free_txskb(), then it points to a sk_buff
>>> which is already freed. If it run into the "goto out" after arrived to
>>> label "begin", then it will return a sk_buff which is freed, it is a
>>> risk for use-after-free.
>>>
>>> Fixes: ded4698b58cb ("mac80211: run late dequeue late tx handlers 
>>> without holding fq->lock")
>>> Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
>>
>> I don't see any progress on this patch. Is there a problem with it ?
>> Did it get lost ?
>>
> 
> Looks ok for me. But I just noticed that my patch
> https://patchwork.kernel.org/project/linux-wireless/patch/20221230121850.218810-1-alexander@wetzel-home.de/
> 
> should also fix the issue as an unintended side effect.

Sorry that statement was incomplete: It's only fixed when
https://patchwork.kernel.org/project/linux-wireless/patch/20221230121850.218810-1-alexander@wetzel-home.de/
and
https://patchwork.kernel.org/project/linux-wireless/patch/20230106223141.98696-1-alexander@wetzel-home.de/

are applied.









WARNING: multiple messages have this Message-ID (diff)
From: Alexander Wetzel <alexander@wetzel-home.de>
To: Guenter Roeck <linux@roeck-us.net>, Wen Gong <quic_wgong@quicinc.com>
Cc: johannes@sipsolutions.net, ath11k@lists.infradead.org,
	linux-wireless@vger.kernel.org
Subject: Re: [PATCH] wifi: mac80211: change initialize for sk_buff in ieee80211_tx_dequeue()
Date: Mon, 9 Jan 2023 15:22:22 +0100	[thread overview]
Message-ID: <3372b42f-b9bf-20e8-35f9-5370571a9e35@wetzel-home.de> (raw)
In-Reply-To: <d28c6340-7ad2-d7f6-939d-3a1a057cb7da@wetzel-home.de>

On 09.01.23 15:05, Alexander Wetzel wrote:
> On 05.01.23 06:26, Guenter Roeck wrote:
>> On Mon, Dec 12, 2022 at 03:36:07AM -0500, Wen Gong wrote:
>>> The sk_buff is only set to NULL when initialize, sometimes it will goto
>>> label "begin" after ieee80211_free_txskb(), then it points to a sk_buff
>>> which is already freed. If it run into the "goto out" after arrived to
>>> label "begin", then it will return a sk_buff which is freed, it is a
>>> risk for use-after-free.
>>>
>>> Fixes: ded4698b58cb ("mac80211: run late dequeue late tx handlers 
>>> without holding fq->lock")
>>> Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
>>
>> I don't see any progress on this patch. Is there a problem with it ?
>> Did it get lost ?
>>
> 
> Looks ok for me. But I just noticed that my patch
> https://patchwork.kernel.org/project/linux-wireless/patch/20221230121850.218810-1-alexander@wetzel-home.de/
> 
> should also fix the issue as an unintended side effect.

Sorry that statement was incomplete: It's only fixed when
https://patchwork.kernel.org/project/linux-wireless/patch/20221230121850.218810-1-alexander@wetzel-home.de/
and
https://patchwork.kernel.org/project/linux-wireless/patch/20230106223141.98696-1-alexander@wetzel-home.de/

are applied.









-- 
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  reply	other threads:[~2023-01-09 14:22 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-12  8:36 [PATCH] wifi: mac80211: change initialize for sk_buff in ieee80211_tx_dequeue() Wen Gong
2022-12-12  8:36 ` Wen Gong
2023-01-05  5:26 ` Guenter Roeck
2023-01-05  5:26   ` Guenter Roeck
2023-01-09 14:05   ` Alexander Wetzel
2023-01-09 14:05     ` Alexander Wetzel
2023-01-09 14:22     ` Alexander Wetzel [this message]
2023-01-09 14:22       ` Alexander Wetzel
2023-01-09 15:43       ` Guenter Roeck
2023-01-09 15:43         ` Guenter Roeck
2023-01-09 15:39     ` Guenter Roeck
2023-01-09 15:39       ` Guenter Roeck

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