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

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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: da44c340c4 ("vfio/mdev: simplify mdev_type handling")
Cc: stable@vger.kernel.org
Cc: Tony Krowiak <akrowiak@linux.ibm.com>
Reported-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Jason J. Herne 2022-10-21 10:50:02 -04:00 committed by Vasily Gorbik
parent 1b60741127
commit e38de48044
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/crypto/vfio_ap_private.h
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@ -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;