Re: [PATCH v24 1/5] vhost_user: Clear ring address on GET_VRING_BASE

On Sat, 15 Feb 2025 00:08:41 +1100
David Gibson <david(a)gibson.dropbear.id.au> wrote:

...
  GET_VRING_BASE stops the queue, clearing the call and
kick fds.  However,
 we don't clear vring.avail.  That means that if vu_queue_notify() is called
 it won't realise the queue isn't ready and will die with an EBADFD.
 
 We get this during migration, because for some reason, qemu reconfigures
 the vhost-user device when a migration is triggered.  There's a window
 between the GET_VRING_BASE and re-establishing the call fd where the
 notify function can be called, causing a crash.
 
 Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au> 
Applied.

-- 
Stefano