From e1e1af9148dc4c866eda3fb59cd6ec3c7ea34b1d Mon Sep 17 00:00:00 2001
From: Zhang Zekun <zhangzekun11@huawei.com>
Date: Fri, 25 Oct 2024 15:34:08 +0800
Subject: [PATCH] drm/panel: himax-hx83102: Add a check to prevent NULL pointer
dereference
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@huawei.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241025073408.27481-3-zhangzekun11@huawei.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241025073408.27481-3-zhangzekun11@huawei.com
---
drivers/gpu/drm/panel/panel-himax-hx83102.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/panel/panel-himax-hx83102.c
index 8b48bba181316..3644a7544b935 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);
--
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