Juergen Gross f9244fb55f xen/netfront: fix crash when removing device
When removing a netfront device directly after a suspend/resume cycle
it might happen that the queues have not been setup again, causing a
crash during the attempt to stop the queues another time.

Fix that by checking the queues are existing before trying to stop
them.

This is XSA-465 / CVE-2024-53240.

Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Fixes: d50b7914fae0 ("xen-netfront: Fix NULL sring after live migration")
Signed-off-by: Juergen Gross <jgross@suse.com>
2024-12-13 09:12:24 +01:00
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