Re: [PATCH v2 1/2] xen/xenbus: reference count registered modules

From: JÃrgen GroÃ
Date: Fri Nov 29 2019 - 10:46:19 EST


On 29.11.19 14:43, Paul Durrant wrote:
To prevent a module being removed whilst attached to a frontend, and
hence xenbus calling into potentially invalid text, take a reference on
the module before calling the probe() method (dropping it if unsuccessful)
and drop the reference after returning from the remove() method.

NOTE: This allows the ad-hoc reference counting in xen-netback to be
removed. This will be done in a subsequent patch.

Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>

Reviewed-by: Juergen Gross <jgross@xxxxxxxx>


Juergen