Commit 2c1fe3c4 authored by Ma Ke's avatar Ma Ke Committed by Alex Deucher
Browse files

drm/radeon: fix a possible null pointer dereference 



In radeon_tv_get_modes(), the return value of drm_cvt_mode()
is assigned to mode, which will lead to a NULL pointer
dereference on failure of drm_cvt_mode(). Add a check to
avoid null point dereference.

Signed-off-by: default avatarMa Ke <make_ruc2021@163.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ffa88b00

drivers/gpu/drm/radeon/radeon_connectors.c

+2 −0
Original line number Diff line number Diff line
@@ -1119,6 +1119,8 @@ static int radeon_tv_get_modes(struct drm_connector *connector) 
	else {

		/* only 800x600 is supported right now on pre-avivo chips */

		tv_mode = drm_cvt_mode(dev, 800, 600, 60, false, false, false);

		if (!tv_mode)

			return 0;

		tv_mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;

		drm_mode_probed_add(connector, tv_mode);

	}