From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reject requests to add properties/enums with an overly long name.
Previously we would have just silently truncated the string and exposed
it userspace.
v2: drm_property_create() returns a pointer
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/drm_property.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c
index fe8627fb7ae6..c37ac41125b5 100644
--- a/drivers/gpu/drm/drm_property.c
+++ b/drivers/gpu/drm/drm_property.c
@@ -78,6 +78,9 @@ struct drm_property *drm_property_create(struct drm_device
*dev, int flags,
struct drm_property *property = NULL;
int ret;
+ if (WARN_ON(strlen(name) >= DRM_PROP_NAME_LEN))
+ return NULL;
+
property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
if (!property)
return NULL;
@@ -372,6 +375,9 @@ int drm_property_add_enum(struct drm_property *property,
int index,
{
struct drm_property_enum *prop_enum;
+ if (WARN_ON(strlen(name) >= DRM_PROP_NAME_LEN))
+ return -EINVAL;
+
if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
return -EINVAL;
--
2.16.1
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