netdev - [PATCH net] rtnetlink: Fail dump if target netnsid is invalid

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: <20180928192841.20410-1-dsahern@kernel.org>
Date:   Fri, 28 Sep 2018 12:28:41 -0700
From:   David Ahern <dsahern@...nel.org>
To:     netdev@...r.kernel.org
Cc:     jbenc@...hat.com, davem@...emloft.net,
        David Ahern <dsahern@...il.com>
Subject: [PATCH net] rtnetlink: Fail dump if target netnsid is invalid

From: David Ahern <dsahern@...il.com>

Link dumps can return results from a target namespace. If the namespace id
is invalid, then the dump request should fail if get_target_net fails
rather than continuing with a dump of the current namespace.

Fixes: 79e1ad148c844 ("rtnetlink: use netnsid to query interface")
Signed-off-by: David Ahern <dsahern@...il.com>
---
 net/core/rtnetlink.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 63ce2283a456..7f37fe9c65a5 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1898,10 +1898,8 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 		if (tb[IFLA_IF_NETNSID]) {
 			netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
 			tgt_net = get_target_net(skb->sk, netnsid);
-			if (IS_ERR(tgt_net)) {
-				tgt_net = net;
-				netnsid = -1;
-			}
+			if (IS_ERR(tgt_net))
+				return PTR_ERR(tgt_net);
 		}
 
 		if (tb[IFLA_EXT_MASK])
-- 
2.11.0