[PATCH] drm: Fix NULL pointer dereference in drm_mode_setcrtc

[Martin H. <hu...@gm...>]

The problem is the drm_mode_setcrtc function does not check
whether allocation of new display mode succeeded or not.

Signed-off-by: Martin Hurton <hu...@gm...>
---
 drivers/gpu/drm/drm_crtc.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 94a7688..1a3d6b6 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1451,6 +1451,11 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 		}
 
 		mode = drm_mode_create(dev);
+		if (!mode) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
 		drm_crtc_convert_umode(mode, &crtc_req->mode);
 		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
 	}
-- 
1.6.2.4