From: Liang He Date: Wed, 15 Mar 2023 06:00:21 +0000 (+0800) Subject: ethernet: sun: add check for the mdesc_grab() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8a1ce024f1f6d344ab8b271ff35ee69264e27f63;p=linux.git ethernet: sun: add check for the mdesc_grab() [ Upstream commit 90de546d9a0b3c771667af18bb3f80567eabb89b ] In vnet_port_probe() and vsw_port_probe(), we should check the return value of mdesc_grab() as it may return NULL which can caused NPD bugs. Fixes: 5d01fa0c6bd8 ("ldmvsw: Add ldmvsw.c driver code") Fixes: 43fdf27470b2 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.") Signed-off-by: Liang He Reviewed-by: Piotr Raczynski Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 50bd4e3b0af9d..cde65f76e5cef 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -290,6 +290,9 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) hp = mdesc_grab(); + if (!hp) + return -ENODEV; + rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); err = -ENODEV; if (!rmac) { diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 58ee89223951e..dcdfc1fd3d2ca 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -431,6 +431,9 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) hp = mdesc_grab(); + if (!hp) + return -ENODEV; + vp = vnet_find_parent(hp, vdev->mp, vdev); if (IS_ERR(vp)) { pr_err("Cannot find port parent vnet\n");