From: Colin Ian King colin.king@canonical.com
commit 2133c4fc8e1348dcb752f267a143fe2254613b34 upstream.
The initialization of pointer dev dereferences pointer edp before edp is null checked, so there is a potential null pointer deference issue. Fix this by only dereferencing edp after edp has been null checked.
Addresses-Coverity: ("Dereference before null check") Fixes: ab5b0107ccf3 ("drm/msm: Initial add eDP support in msm drm driver (v5)") Signed-off-by: Colin Ian King colin.king@canonical.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Link: https://lore.kernel.org/r/20210929121857.213922-1-colin.king@canonical.com Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/msm/edp/edp_ctrl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/msm/edp/edp_ctrl.c +++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c @@ -1116,7 +1116,7 @@ void msm_edp_ctrl_power(struct edp_ctrl int msm_edp_ctrl_init(struct msm_edp *edp) { struct edp_ctrl *ctrl = NULL; - struct device *dev = &edp->pdev->dev; + struct device *dev; int ret;
if (!edp) { @@ -1124,6 +1124,7 @@ int msm_edp_ctrl_init(struct msm_edp *ed return -EINVAL; }
+ dev = &edp->pdev->dev; ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); if (!ctrl) return -ENOMEM;