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Date:   Thu, 23 Sep 2021 16:24:39 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Cheng Chao <cs.os.kernel@gmail.com>
Cc:     labbott@redhat.com, sumit.semwal@linaro.org, arve@android.com,
        riandrews@android.com, devel@driverdev.osuosl.org,
        stable@vger.kernel.org
Subject: Re: [PATCH 4.9] staging: android: ion: fix page is NULL
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 <20210923141814.1109472-1-cs.os.kernel@gmail.com>
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On Thu, Sep 23, 2021 at 10:18:14PM +0800, Cheng Chao wrote:
> Fixes: commit e7f63771b60e ("ION: Sys_heap: Add cached pool to spead up cached buffer alloc")
> the commit e7f63771b60e introduced the bug which didn't test page which maybe NULL.
> and previous logic was right.
> 
> the e7f63771b60e has been merged in v4.8-rc3, only longterm 4.9.x has this bug,
> and other longterm/stable version have not.

<snip>

thanks for this, now queued up.

greg k-h