Re: [PATCH] xen/events: avoid NULL pointer dereference in evtchn_from_irq()
From: Boris Ostrovsky
Date: Thu Mar 19 2020 - 12:01:28 EST
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)
-boris