This is a note to let you know that I've just added the patch titled
drm/panel/panel-tpo-tpg110: fix a possible null pointer dereference
to the 5.15-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-panel-tpo-tpg110-fix-a-possible-null-point.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4eae05efba7c77eb9e60b2f96f363cf844075e4d
Author: Ma Ke <make_ruc2021@xxxxxxx>
Date: Mon Oct 9 17:04:46 2023 +0800
drm/panel/panel-tpo-tpg110: fix a possible null pointer dereference
[ Upstream commit f22def5970c423ea7f87d5247bd0ef91416b0658 ]
In tpg110_get_modes(), the return value of drm_mode_duplicate() is
assigned to mode, which will lead to a NULL pointer dereference on
failure of drm_mode_duplicate(). Add a check to avoid npd.
Signed-off-by: Ma Ke <make_ruc2021@xxxxxxx>
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231009090446.4043798-1-make_ruc2021@xxxxxxx
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231009090446.4043798-1-make_ruc2021@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-tpo-tpg110.c b/drivers/gpu/drm/panel/panel-tpo-tpg110.c
index e3791dad6830c..3360e7ccb0a7d 100644
--- a/drivers/gpu/drm/panel/panel-tpo-tpg110.c
+++ b/drivers/gpu/drm/panel/panel-tpo-tpg110.c
@@ -379,6 +379,8 @@ static int tpg110_get_modes(struct drm_panel *panel,
connector->display_info.bus_flags = tpg->panel_mode->bus_flags;
mode = drm_mode_duplicate(connector->dev, &tpg->panel_mode->mode);
+ if (!mode)
+ return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
