Re: [PATCH] bcache: fix uninitialized closure object

[Jens Axboe <axboe@kernel.dk>]

On 4/7/26 3:28 AM, Coly Li wrote:
>> 2026?4?3? 19:11?Jens Axboe <axboe@kernel.dk> ???
>>
>> On 4/2/26 10:21 PM, colyli@fnnas.com wrote:
>>> From: Mingzhe Zou <mingzhe.zou@easystack.cn>
>>>
>>> In the previous patch ("bcache: fix cached_dev.sb_bio use-after-free and
>>> crash"), we adopted a simple modification suggestion from AI to fix the
>>> use-after-free.
>>>
>>> But in actual testing, we found an extreme case where the device is
>>> stopped before calling bch_write_bdev_super().
>>>
>>> At this point, struct closure sb_write has not been initialized yet.
>>> For this patch, we ensure that sb_bio has been completed via
>>> sb_write_mutex.
>>
>> Presumably this should have a:
>>
>> Fixes: fec114a98b87 ("bcache: fix cached_dev.sb_bio use-after-free and crash")
>>
>> but for some reason it does not. I'll add it.
> 
> I did it on purpose. Because this patch is in Linux-stable and not in mainline,
> I am not sure whether it is proper to reference the linux-block tree commit id.
> 
> This is why the patch title is mentioned in commit log, but commit id skipped.

Why is the patch in stable and not in mainline?! That should generally
never happen.

-- 
Jens Axboe