In drm_mode_std(), the return value of drm_gtf_mode(), drm_gtf_mode() and drm_cvt_mode() is assigned to mode, which will lead to a NULL pointer dereference on failure of drm_gtf_mode(), drm_gtf_mode() and drm_cvt_mode(). Add a check to avoid null point dereference. Signed-off-by: Ma Ke <make_ruc2021@xxxxxxx> --- drivers/gpu/drm/drm_edid.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 340da8257b51..e2c154c2b896 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3381,6 +3381,8 @@ static struct drm_display_mode *drm_mode_std(struct drm_connector *connector, false); break; } + if (!mode) + return NULL; return mode; } -- 2.37.2
