From e975eef07cbca53691f504318609bb95c7e5f1ac Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 26 Apr 2016 19:29:37 +0200 Subject: [PATCH] drm: Forbid legacy MAP functions for DRIVER_MODESET Like in commit 0e975980d435d58df2d430d688b8c18778b42218 Author: Peter Antoine Date: Tue Jun 23 08:18:49 2015 +0100 drm: Turn off Legacy Context Functions we need to again make an exception for nouveau, but everyone else really doesn't need this. Dave Airlie dug out again why we need this: The problem is the legacy dri1 open function the nouveau ddx called, and the problematic code is actually in the X server itself. It was only fixed in commit b1a630b48210d6a3c44994fce1b73273000ace5c Author: Dave Airlie Date: Wed Nov 7 14:45:14 2012 +1000 nouveau: drop DRI1 device open interface. Cc: Peter Antoine Cc: Ben Skeggs Acked-by: Alex Deucher Acked-by: Dave Airlie Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-5-git-send-email-daniel.vetter@ffwll.ch Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-6-git-send-email-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_bufs.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index d92db7007f62..e8a12a4fd400 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -396,6 +396,10 @@ int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data, if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) return -EPERM; + if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && + drm_core_check_feature(dev, DRIVER_MODESET)) + return -EINVAL; + err = drm_addmap_core(dev, map->offset, map->size, map->type, map->flags, &maplist); @@ -438,6 +442,10 @@ int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data, int idx; int i; + if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && + drm_core_check_feature(dev, DRIVER_MODESET)) + return -EINVAL; + idx = map->offset; if (idx < 0) return -EINVAL; @@ -569,6 +577,10 @@ int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data, struct drm_map_list *r_list; int ret; + if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && + drm_core_check_feature(dev, DRIVER_MODESET)) + return -EINVAL; + mutex_lock(&dev->struct_mutex); list_for_each_entry(r_list, &dev->maplist, head) { if (r_list->map && -- 2.30.2