fb_helper is being dereferenced before it is null checked,
hence there is a potential null pointer dereference.
Fix this by moving the pointer dereference after fb_helper
has been null checked.
This issue was detected with the help of Coccinelle.
Fixes: c777990fb45b ("drm/fb-helper: Handle function NULL argument")
Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
---
drivers/gpu/drm/drm_fb_helper.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 6654f2f..04a3a5c 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -178,7 +178,7 @@ EXPORT_SYMBOL(drm_fb_helper_add_one_connector);
*/
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
{
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev;
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
int i, ret = 0;
@@ -186,6 +186,8 @@ int drm_fb_helper_single_add_all_connectors(struct
drm_fb_helper *fb_helper)
if (!drm_fbdev_emulation || !fb_helper)
return 0;
+ dev = fb_helper->dev;
+
mutex_lock(&fb_helper->lock);
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
--
2.7.4
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