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Date:   Mon, 12 Dec 2022 12:55:32 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Oliver Hartkopp <socketcan@hartkopp.net>
Cc:     harperchen1110@gmail.com, mkl@pengutronix.de,
        stable@vger.kernel.org
Subject: Re: FAILED: patch "[PATCH] can: af_can: fix NULL pointer dereference
 in can_rcv_filter" failed to apply to 4.19-stable tree
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 <e3b578a6-450b-11d6-caf9-33af7ad3cc3a@hartkopp.net>
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On Mon, Dec 12, 2022 at 11:15:58AM +0100, Oliver Hartkopp wrote:
> Just FYI
> 
> The longterm kernels before Linux 5.4 (4.9/4.14/4.19) are not affected by
> this issue as the netdev->ml_priv pointer is assigned within a netdev
> notifier for ARPHRD_CAN interfaces and this always assigns the data
> structure properly.
> 
> I tested the crash reproducer from the syzbot bug report which did not have
> any bad effect (as expected).

Wonderful, thanks for letting us know.

greg k-h