6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make_ruc2021@163.com
[ Upstream commit 924e5814d1f84e6fa5cb19c6eceb69f066225229 ]
In versatile_panel_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@163.com Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Link: https://lore.kernel.org/r/20231007033105.3997998-1-make_ruc2021@163.com Signed-off-by: Neil Armstrong neil.armstrong@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20231007033105.3997998-1-make_... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/panel/panel-arm-versatile.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-arm-versatile.c b/drivers/gpu/drm/panel/panel-arm-versatile.c index abb0788843c60..503ecea72c5ea 100644 --- a/drivers/gpu/drm/panel/panel-arm-versatile.c +++ b/drivers/gpu/drm/panel/panel-arm-versatile.c @@ -267,6 +267,8 @@ static int versatile_panel_get_modes(struct drm_panel *panel, connector->display_info.bus_flags = vpanel->panel_type->bus_flags;
mode = drm_mode_duplicate(connector->dev, &vpanel->panel_type->mode); + if (!mode) + return -ENOMEM; drm_mode_set_name(mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;