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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2018-03-02 17:03:00 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2018-03-06 19:03:02 +0300 |
| commit | 5ebbb5b4d424e030b7d240ce71767c4145c7f26e (patch) | |
| tree | 7bbd284ea36f2db190f0bbe385c6fd5422399657 /drivers/gpu/drm | |
| parent | 8e5e83ad8250043c8d5cc8f2bf672e64c43f948a (diff) | |
| download | linux-5ebbb5b4d424e030b7d240ce71767c4145c7f26e.tar.xz | |
drm: Check property/enum name length
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.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180302140300.31110-1-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_property.c | 6 |
1 files changed, 6 insertions, 0 deletions
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; |