Commit e38de480 authored by Jason J. Herne's avatar Jason J. Herne Committed by Vasily Gorbik
Browse files

s390/vfio-ap: Fix memory allocation for mdev_types array 

The vfio-ap crypto driver fails to allocate memory for an array of
pointers used to pass supported mdev types to mdev_register_parent().

Since we only support a single mdev type, the fix is to allocate a
single entry in the ap_matrix_dev->mdev_types array.

Link: https://lore.kernel.org/r/20221021145905.15100-1-jjherne@linux.ibm.com


Fixes: da44c340 ("vfio/mdev: simplify mdev_type handling")
Cc: stable@vger.kernel.org
Cc: Tony Krowiak <akrowiak@linux.ibm.com>
Reported-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: default avatarJason J. Herne <jjherne@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 1b607411

drivers/s390/crypto/vfio_ap_private.h

+1 −1
Original line number Diff line number Diff line
@@ -52,7 +52,7 @@ struct ap_matrix_dev { 
	struct mutex guests_lock; /* serializes access to each KVM guest */

	struct mdev_parent parent;

	struct mdev_type mdev_type;

	struct mdev_type *mdev_types[];

	struct mdev_type *mdev_types[1];

};



extern struct ap_matrix_dev *matrix_dev;