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drm: Reject fbs w/o format info in drm_framebuffer_init()

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Any framebuffer that doesn't have proper format information when
drm_framebuffer_init() is called is a bug. Let's warn and return
an error to avoid oopsing the kernel later due to dereferencing the
NULL fb->format pointer.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1479498793-31021-23-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Ville Syrjälä 2016-11-18 21:52:58 +02:00
parent 2f3f4763c1
commit 570cec3244
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_framebuffer.c
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@ -631,7 +631,7 @@ int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
{
int ret;
if (WARN_ON_ONCE(fb->dev != dev))
if (WARN_ON_ONCE(fb->dev != dev || !fb->format))
return -EINVAL;
INIT_LIST_HEAD(&fb->filp_head);