diff options
author | Dave Airlie <airlied@redhat.com> | 2019-03-05 08:14:17 +1000 |
---|---|---|
committer | Dave Airlie <airlied@redhat.com> | 2019-03-05 08:14:22 +1000 |
commit | 4b057e73f28f1df13b77b77a52094238ffdf8abd (patch) | |
tree | 816d3abfb3a1a62b08de88265e5fd09f538a1d5d /drivers | |
parent | 634092b1b9f67bea23a87b77880df5e8012a411a (diff) | |
parent | 04b9c48851582aa0971b7d4e9d42c872b8acd0e2 (diff) |
Merge tag 'drm-misc-fixes-2019-02-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-fixes for v5.0:
- Block fb changes for async atomic updates to prevent a use after free.
- Fix ID mismatch error on load in bochs.
- Fix memory leak when drm_setup fails.
- Fixes around handling of DRM_AUTH.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/42113611-e2cd-6bdd-7de5-4f8ab5a0cbe6@linux.intel.com
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/drm_file.c | 22 | ||||
-rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 22 |
2 files changed, 33 insertions, 11 deletions
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index b1838a41ad43..83a5bbca6e7e 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -262,6 +262,18 @@ void drm_file_free(struct drm_file *file) kfree(file); } +static void drm_close_helper(struct file *filp) +{ + struct drm_file *file_priv = filp->private_data; + struct drm_device *dev = file_priv->minor->dev; + + mutex_lock(&dev->filelist_mutex); + list_del(&file_priv->lhead); + mutex_unlock(&dev->filelist_mutex); + + drm_file_free(file_priv); +} + static int drm_setup(struct drm_device * dev) { int ret; @@ -318,8 +330,10 @@ int drm_open(struct inode *inode, struct file *filp) goto err_undo; if (need_setup) { retcode = drm_setup(dev); - if (retcode) + if (retcode) { + drm_close_helper(filp); goto err_undo; + } } return 0; @@ -473,11 +487,7 @@ int drm_release(struct inode *inode, struct file *filp) DRM_DEBUG("open_count = %d\n", dev->open_count); - mutex_lock(&dev->filelist_mutex); - list_del(&file_priv->lhead); - mutex_unlock(&dev->filelist_mutex); - - drm_file_free(file_priv); + drm_close_helper(filp); if (!--dev->open_count) { drm_lastclose(dev); diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 7e6746b2d704..687943df58e1 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -508,6 +508,13 @@ int drm_version(struct drm_device *dev, void *data, return err; } +static inline bool +drm_render_driver_and_ioctl(const struct drm_device *dev, u32 flags) +{ + return drm_core_check_feature(dev, DRIVER_RENDER) && + (flags & DRM_RENDER_ALLOW); +} + /** * drm_ioctl_permit - Check ioctl permissions against caller * @@ -522,14 +529,19 @@ int drm_version(struct drm_device *dev, void *data, */ int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) { + const struct drm_device *dev = file_priv->minor->dev; + /* ROOT_ONLY is only for CAP_SYS_ADMIN */ if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) return -EACCES; - /* AUTH is only for authenticated or render client */ - if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && - !file_priv->authenticated)) - return -EACCES; + /* AUTH is only for master ... */ + if (unlikely((flags & DRM_AUTH) && drm_is_primary_client(file_priv))) { + /* authenticated ones, or render capable on DRM_RENDER_ALLOW. */ + if (!file_priv->authenticated && + !drm_render_driver_and_ioctl(dev, flags)) + return -EACCES; + } /* MASTER is only for master or control clients */ if (unlikely((flags & DRM_MASTER) && @@ -570,7 +582,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_invalid_op, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), - DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_UNLOCKED|DRM_MASTER), + DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_UNLOCKED|DRM_MASTER), DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), |