[Linux-stm32] [PATCH] net: stmmac: fix a potential NULL pointer dereference

[Kangjie Lu]

In case of_device_get_match_data fails, the fix return -ENOMEM
to avoid the NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu at umn.edu>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 3256e5cbad27..344ead5949b1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -485,6 +485,8 @@ static int dwc_eth_dwmac_remove(struct platform_device *pdev)
 	int err;
 
 	data = of_device_get_match_data(&pdev->dev);
+	if (!data)
+		return -EINVAL;
 
 	err = stmmac_dvr_remove(&pdev->dev);
 	if (err < 0)
-- 
2.17.1