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Date:   Thu, 19 Mar 2020 12:01:05 -0400
From:   Boris Ostrovsky <>
To:     Juergen Gross <>,,
Cc:     Stefano Stabellini <>,
        Marek Marczykowski-Górecki 
Subject: Re: [PATCH] xen/events: avoid NULL pointer dereference in

On 3/19/20 3:14 AM, Juergen Gross wrote:
> There have been reports of races in evtchn_from_irq() where the info
> pointer has been NULL.

Do you have an example of how this race happens (and how moving kfree to 
rcu will help)?

(I am mostly wondering whether we'd be masking a more serious problem)


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