Re: [PATCH for 4.19-stable] padata: fix null pointer deref of pd->pinst

[Yang Yingliang]

Hi,


On 2020/2/15 23:01, Sasha Levin wrote:
> Hi,
>
> [This is an automated email]
>
> This commit has been processed because it contains a "Fixes:" tag,
> fixing commit: dc34710a7aba ("padata: Remove broken queue flushing").
>
> The bot has tested the following trees: v5.5.3, v5.4.19, v4.19.103.
>
> v5.5.3: Build failed! Errors:
>      kernel/padata.c:460:4: error: ‘struct parallel_data’ has no member named ‘pinst’
>
> v5.4.19: Build failed! Errors:
>      kernel/padata.c:460:4: error: ‘struct parallel_data’ has no member named ‘pinst’
>
> v4.19.103: Build OK!
>
> NOTE: The patch will not be queued to stable trees until it is upstream.
>
> How should we proceed with this patch?
The commit bbefa1dd6a6d ("crypto: pcrypt - Avoid deadlock by using 
per-instance padata queues") that merged
on linux-5.4.y and linux-5.5.y changes struct parallel_data, so this 
patch it's only needed on linux-4.19.y.
>