From e034b8a18d4badceecb672c58b488bad1e901d95 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Wed, 22 Feb 2023 13:37:12 +0100 Subject: [PATCH] drm/msm: Fix possible uninitialized access in fbdev Do not run drm_fb_helper_unprepare() if fbdev allocation fails. Avoids access to an uninitialized pointer. Original bug report is at [1]. Reported-by: kernel test robot Signed-off-by: Thomas Zimmermann Fixes: 3fb1f62f80a1 ("drm/fb-helper: Remove drm_fb_helper_unprepare() from drm_fb_helper_fini()") Link: https://lore.kernel.org/oe-kbuild-all/202302220810.9dymwCQ8-lkp@intel.com/ # 1 Reviewed-by: Dmitry Baryshkov Link: https://patchwork.freedesktop.org/patch/msgid/20230222123712.5049-1-tzimmermann@suse.de --- drivers/gpu/drm/msm/msm_fbdev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c index c804e5b..d26aa52 100644 --- a/drivers/gpu/drm/msm/msm_fbdev.c +++ b/drivers/gpu/drm/msm/msm_fbdev.c @@ -136,13 +136,13 @@ static const struct drm_fb_helper_funcs msm_fb_helper_funcs = { struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; - struct msm_fbdev *fbdev = NULL; + struct msm_fbdev *fbdev; struct drm_fb_helper *helper; int ret; fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); if (!fbdev) - goto fail; + return NULL; helper = &fbdev->base; -- 2.7.4