This is a note to let you know that I've just added the patch titled
drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-panel-himax-hx83102-add-a-check-to-prevent-null-.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 43d6b0a3525f5334f0b715c7ae763fa30cc99374
Author: Zhang Zekun <zhangzekun11@xxxxxxxxxx>
Date: Fri Oct 25 15:34:08 2024 +0800
drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference
[ Upstream commit e1e1af9148dc4c866eda3fb59cd6ec3c7ea34b1d ]
drm_mode_duplicate() could return NULL due to lack of memory,
which will then call NULL pointer dereference. Add a check to
prevent it.
Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")
Signed-off-by: Zhang Zekun <zhangzekun11@xxxxxxxxxx>
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241025073408.27481-3-zhangzekun11@xxxxxxxxxx
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241025073408.27481-3-zhangzekun11@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/panel/panel-himax-hx83102.c
index 8b48bba18131..3644a7544b93 100644
--- a/drivers/gpu/drm/panel/panel-himax-hx83102.c
+++ b/drivers/gpu/drm/panel/panel-himax-hx83102.c
@@ -565,6 +565,8 @@ static int hx83102_get_modes(struct drm_panel *panel,
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, m);
+ if (!mode)
+ return -ENOMEM;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_set_name(mode);
