6.12-stable review patch. If anyone has any objections, please let me know.
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From: Zhang Zekun zhangzekun11@huawei.com
[ 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@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-zhangze... Signed-off-by: Sasha Levin sashal@kernel.org --- 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 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);