Re: [PATCH v2 4/8] s390/vfio-ap: Fix required lock not held during update of ap_matrix_mdev object

[Matthew Rosato]

On 8/10/26 3:22 PM, Anthony Krowiak wrote:
> In the vfio_ap_mdev_cfg_add function, the apm_add, aqm_add and adm_add
> fields of an ap_matrix_mdev object fields are modified while not holding
> the matrix_dev->mdevs_lock. This lock must be held while making these
> to guard against a race condition with another caller that may be
> concurrently modifying these fields or any of the fields in the
> matrix_mdev->matrix.
> 
> Fixes: eeb386aeb5b7c ("s390/vfio-ap: handle config changed and scan complete notification")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Anthony Krowiak <akrowiak@xxxxxxxxxxxxx>

Reviewed-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>