netdev - Re: [Intel-wired-lan] [PATCH net] ice: fix unaligned access in ice_create_lag

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Date: Wed, 7 Feb 2024 10:15:44 +0800
From: "Zou, Steven" <steven.zou@...el.com>
To: Alexander Lobakin <aleksander.lobakin@...el.com>
CC: Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Michal Schmidt
	<mschmidt@...hat.com>, Jiri Pirko <jiri@...nulli.us>, Daniel Machon
	<daniel.machon@...rochip.com>, <netdev@...r.kernel.org>, Jesse Brandeburg
	<jesse.brandeburg@...el.com>, Tony Nguyen <anthony.l.nguyen@...el.com>, "Dave
 Ertman" <david.m.ertman@...el.com>, <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [Intel-wired-lan] [PATCH net] ice: fix unaligned access in
 ice_create_lag_recipe


On 2/7/2024 8:44 AM, Zou, Steven wrote:
>
> On 2/2/2024 9:01 PM, Alexander Lobakin wrote:
>> From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
>> Date: Fri, 2 Feb 2024 14:00:03 +0100
>>
>>> On Fri, Feb 02, 2024 at 01:40:18PM +0100, Alexander Lobakin wrote:
>>>> From: Alexander Lobakin <aleksander.lobakin@...el.com>
>>>> Date: Fri, 2 Feb 2024 13:39:28 +0100
>>>>
>>>>> From: Michal Schmidt <mschmidt@...hat.com>
>>>>> Date: Thu, 1 Feb 2024 19:40:17 +0100
>>>>>
>>>>>> On 1/31/24 17:59, Alexander Lobakin wrote:
>>>>>>> From: Jiri Pirko <jiri@...nulli.us>
>>>>>>> Date: Wed, 31 Jan 2024 13:17:44 +0100
>>>>>>>
>>>>>>>> Wed, Jan 31, 2024 at 12:58:23PM CET, mschmidt@...hat.com wrote:
>>>>>>>>> diff --git a/drivers/net/ethernet/intel/ice/ice_lag.c
>>>>>>>>> b/drivers/net/ethernet/intel/ice/ice_lag.c
>>>>>>>>> index 2a25323105e5..d4848f6fe919 100644
>>>>>>>>> --- a/drivers/net/ethernet/intel/ice/ice_lag.c
>>>>>>>>> +++ b/drivers/net/ethernet/intel/ice/ice_lag.c
>>>>>>>>> @@ -1829,9 +1829,7 @@ static int ice_create_lag_recipe(struct 
>>>>>>>>> ice_hw
>>>>>>>>> *hw, u16 *rid,
>>>>>>>>>      new_rcp->content.act_ctrl_fwd_priority = prio;
>>>>>>>>>      new_rcp->content.rid = *rid | ICE_AQ_RECIPE_ID_IS_ROOT;
>>>>>>>>>      new_rcp->recipe_indx = *rid;
>>>>>>>>> -    bitmap_zero((unsigned long *)new_rcp->recipe_bitmap,
>>>>>>>>> -            ICE_MAX_NUM_RECIPES);
>>>>>>>>> -    set_bit(*rid, (unsigned long *)new_rcp->recipe_bitmap);
>>>>>>>>> +    put_unaligned_le64(BIT_ULL(*rid), new_rcp->recipe_bitmap);
>>>>>>>> Looks like there might be another incorrect bitmap usage for 
>>>>>>>> this in
>>>>>>>> ice_add_sw_recipe(). Care to fix it there as well?
>>>>>>> Those are already fixed in one switchdev series and will be sent 
>>>>>>> to IWL
>>>>>>> soon.
>>>>>>> I believe this patch would also make no sense after it's sent.
>>>>>> Hi Alexander,
>>>>>> When will the series be sent?
>>>>>> The bug causes a kernel panic. Will the series target net.git?
>>>>> The global fix is here: [0]
>>>>> It's targeting net-next.
>>>>>
>>>>> I don't know what the best way here would be. Target net instead 
>>>>> or pick
>>>>> your fix to net and then fix it properly in net-next?
>>>> Sorry, forgot to paste the link :clownface:
>>> IMHO 1/2 should go to net. Then you would have to wait for it to got
>>> accepted and get merged to -next and then you come back with 2/2. 
>>> You know
>>> the deal.
>> Agree!
>>
>> Hi Steve,
>>
>> Could you please send the first patch from your series to net instead of
>> net-next?
>>
>> (and add "Fixes:" tag with the blamed commit)
>
> Hi Olek,
> Sure, I will do it soon.

Hi team,
The patch has been rebased and submitted on:
https://lore.kernel.org/intel-wired-lan/20240207014959.24012-1-steven.zou@intel.com/
https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20240207014959.24012-1-steven.zou@intel.com/

Thanks,
Steven

>
>>
>>>> [0]
>>>> https://lore.kernel.org/intel-wired-lan/20240130025146.30265-2-steven.zou@intel.com 
>>>>
>>>>
>>>> Thanks,
>>>> Olek
>> Thanks,
>> Olek