lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <1609324695-1516-1-git-send-email-wangyunjian@huawei.com>
Date:   Wed, 30 Dec 2020 18:38:15 +0800
From:   wangyunjian <wangyunjian@...wei.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>,
        <jerry.lilijun@...wei.com>, <xudingke@...wei.com>,
        Yunjian Wang <wangyunjian@...wei.com>
Subject: [PATCH net] macvlan: fix null pointer dereference in macvlan_changelink_sources()

From: Yunjian Wang <wangyunjian@...wei.com>

Currently pointer data is dereferenced when declaring addr before
pointer data is null checked. This could lead to a null pointer
dereference. Fix this by checking if pointer data is null first.

Fixes: 79cf79abce71 ("macvlan: add source mode")
Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>
---
 drivers/net/macvlan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index fb51329f8964..e412fd6b6798 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1356,7 +1356,7 @@ static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
 	struct nlattr *nla, *head;
 	struct macvlan_source_entry *entry;
 
-	if (data[IFLA_MACVLAN_MACADDR])
+	if (data && data[IFLA_MACVLAN_MACADDR])
 		addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
 
 	if (mode == MACVLAN_MACADDR_ADD) {
-- 
2.23.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ