6.6-stable review patch. If anyone has any objections, please let me know.
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From: Xiaoguang Wang lege.wang@jaguarmicro.com
commit 4e39ecadf1d2a08187139619f1f314b64ba7d947 upstream.
Allocate one extra virtio_device_id as null terminator, otherwise vdpa_mgmtdev_get_classes() may iterate multiple times and visit undefined memory.
Fixes: ffbda8e9df10 ("vdpa/vp_vdpa : add vdpa tool support in vp_vdpa") Cc: stable@vger.kernel.org Suggested-by: Parav Pandit parav@nvidia.com Signed-off-by: Angus Chen angus.chen@jaguarmicro.com Signed-off-by: Xiaoguang Wang lege.wang@jaguarmicro.com Message-Id: 20241105133518.1494-1-lege.wang@jaguarmicro.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Reviewed-by: Parav Pandit parav@nvidia.com Acked-by: Jason Wang jasowang@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/vdpa/virtio_pci/vp_vdpa.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c +++ b/drivers/vdpa/virtio_pci/vp_vdpa.c @@ -591,7 +591,11 @@ static int vp_vdpa_probe(struct pci_dev goto mdev_err; }
- mdev_id = kzalloc(sizeof(struct virtio_device_id), GFP_KERNEL); + /* + * id_table should be a null terminated array, so allocate one additional + * entry here, see vdpa_mgmtdev_get_classes(). + */ + mdev_id = kcalloc(2, sizeof(struct virtio_device_id), GFP_KERNEL); if (!mdev_id) { err = -ENOMEM; goto mdev_id_err; @@ -611,8 +615,8 @@ static int vp_vdpa_probe(struct pci_dev goto probe_err; }
- mdev_id->device = mdev->id.device; - mdev_id->vendor = mdev->id.vendor; + mdev_id[0].device = mdev->id.device; + mdev_id[0].vendor = mdev->id.vendor; mgtdev->id_table = mdev_id; mgtdev->max_supported_vqs = vp_modern_get_num_queues(mdev); mgtdev->supported_features = vp_modern_get_features(mdev);