[Mesa-stable] [PATCH] egl/wayland: bail out when drmGetMagic fails

[Emil Velikov]

From: Emil Velikov <emil.velikov at collabora.com>

Currently as the function fails, we pass uninitialized data to the
authentication function. Stop doing that and print an warning when
the function fails.

Cc: mesa-stable at lists.freedesktop.org
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
 src/egl/drivers/dri2/platform_wayland.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index cda6f25a7e0..f2dc26d5850 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -1134,7 +1134,10 @@ drm_handle_device(void *data, struct wl_drm *drm, const char *device)
    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
       dri2_dpy->authenticated = true;
    } else {
-      drmGetMagic(dri2_dpy->fd, &magic);
+      if (drmGetMagic(dri2_dpy->fd, &magic)) {
+         _eglLog(_EGL_WARNING, "wayland-egl: drmGetMagic failed");
+         return;
+      }
       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
    }
 }
-- 
2.19.1