s390/vfio-ap: Fix required lock not held during update of ap_matrix_mdev object

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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: eeb386aeb5 ("s390/vfio-ap: handle config changed and scan complete notification")
Cc: stable@vger.kernel.org
Signed-off-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>

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Anthony Krowiak 2026-08-12 16:02:35 -04:00 • committed by Christian Borntraeger

parent 7fa61c2985

commit 5883528250

1 changed files with 8 additions and 0 deletions

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drivers/s390/crypto/vfio_ap_ops.c

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