dpaa2-eth: check the result of skb_to_sgvec()

Before passing the result of skb_to_sgvec() to dma_map_sg() check if any error was returned. Signed-off-by: Ioana Ciornei <[email protected]> Signed-off-by: David S. Miller <[email protected]>
devinus · Jun 25, 2020 · 37fbbdd · 37fbbdd
1 parent 0da1e28
commit 37fbbdd
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -611,6 +611,10 @@ static int build_sg_fd(struct dpaa2_eth_priv *priv,
 
 	sg_init_table(scl, nr_frags + 1);
 	num_sg = skb_to_sgvec(skb, scl, 0, skb->len);
+	if (unlikely(num_sg < 0)) {
+		err = -ENOMEM;
+		goto dma_map_sg_failed;
+	}
 	num_dma_bufs = dma_map_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL);
 	if (unlikely(!num_dma_bufs)) {
 		err = -ENOMEM;