[PATCH net] net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_xdp_run

[Lorenzo Bianconi]

Fix possible NULL pointer dereference in mtk_xdp_run() if the
ebpf program returns XDP_TX and xdp_convert_buff_to_frame routine fails
returning NULL.

Fixes: 5886d26fd25bb ("net: ethernet: mtk_eth_soc: add xmit XDP support")
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index d9426b01f462..8aff4c0c28bd 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1732,7 +1732,7 @@ static u32 mtk_xdp_run(struct mtk_eth *eth, struct mtk_rx_ring *ring,
 	case XDP_TX: {
 		struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp);
 
-		if (mtk_xdp_submit_frame(eth, xdpf, dev, false)) {
+		if (!xdpf || mtk_xdp_submit_frame(eth, xdpf, dev, false)) {
 			count = &hw_stats->xdp_stats.rx_xdp_tx_errors;
 			act = XDP_DROP;
 			break;
-- 
2.37.2