drm_vblank_init can fail due to insufficient memory. Ignoring the error and proceeding may cause the kernel to dereference an invalid pointer when vblank is enabled. Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx> --- drivers/gpu/drm/sun4i/sun4i_drv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c index 8e777167bca4..63c46643fdd1 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -130,7 +130,11 @@ static int sun4i_drv_bind(struct device *dev) } drm->dev_private = drv; - drm_vblank_init(drm, 1); + /* drm_vblank_init calls kcalloc, which can fail */ + ret = drm_vblank_init(drm, 1); + if (ret) + goto free_drm; + drm_mode_config_init(drm); ret = component_bind_all(drm->dev, drm); -- 2.11.0 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
