From: Michal Krawczyk <mk@semihalf.com>
Date: Thu, 17 Sep 2020 05:30:30 +0000 (+0200)
Subject: net/ena/base: check null meta desc
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=4ad61424aaab783002947e4348afcd16ecb58327;p=dpdk.git

net/ena/base: check null meta desc

Static code analysis showed up, that it's possible for meta_desc being
NULL. To avoid dereference of the NULL pointer, extra check was added if
the pointer is in fact valid.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
---

diff --git a/drivers/net/ena/base/ena_eth_com.c b/drivers/net/ena/base/ena_eth_com.c
index 9c4e6133f5..b6821a7917 100644
--- a/drivers/net/ena/base/ena_eth_com.c
+++ b/drivers/net/ena/base/ena_eth_com.c
@@ -268,6 +268,9 @@ static int ena_com_create_meta(struct ena_com_io_sq *io_sq,
 	struct ena_eth_io_tx_meta_desc *meta_desc = NULL;
 
 	meta_desc = get_sq_desc(io_sq);
+	if (unlikely(!meta_desc))
+		return ENA_COM_FAULT;
+
 	memset(meta_desc, 0x0, sizeof(struct ena_eth_io_tx_meta_desc));
 
 	meta_desc->len_ctrl |= ENA_ETH_IO_TX_META_DESC_META_DESC_MASK;