From: Zheng Yongjun <zhengyongjun3@huawei.com>
To: <andrew@lunn.ch>, <vivien.didelot@gmail.com>,
<f.fainelli@gmail.com>, <davem@davemloft.net>, <kuba@kernel.org>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <vladimir.oltean@nxp.com>, <claudiu.manoil@nxp.com>,
<alexandre.belloni@bootlin.com>, <UNGLinuxDriver@microchip.com>
Subject: [PATCH v2] net: dsa: felix: fix possible NULL pointer dereference
Date: Tue, 29 Mar 2022 09:08:00 +0000 [thread overview]
Message-ID: <20220329090800.130106-1-zhengyongjun3@huawei.com> (raw)
As the possible failure of the allocation, kzalloc() may return NULL
pointer.
Therefore, it should be better to check the 'sgi' in order to prevent
the dereference of NULL pointer.
Fixes: 23ae3a7877718 ("net: dsa: felix: add stream gate settings for psfp").
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
---
v1->v2:Rewrite fixes tag, delete extra 'q'.
drivers/net/dsa/ocelot/felix_vsc9959.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 33f0ceae381d..2875b5250856 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1940,6 +1940,10 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot, int port,
case FLOW_ACTION_GATE:
size = struct_size(sgi, entries, a->gate.num_entries);
sgi = kzalloc(size, GFP_KERNEL);
+ if (!sgi) {
+ ret = -ENOMEM;
+ goto err;
+ }
vsc9959_psfp_parse_gate(a, sgi);
ret = vsc9959_psfp_sgi_table_add(ocelot, sgi);
if (ret) {
--
2.17.1
next reply other threads:[~2022-03-29 9:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-29 9:08 Zheng Yongjun [this message]
2022-03-29 9:18 ` [PATCH v2] net: dsa: felix: fix possible NULL pointer dereference Vladimir Oltean
2022-03-30 19:30 ` patchwork-bot+netdevbpf
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