linux-kernel - [PATCH 5.2 077/413] netfilter: ipset: fix a missing check of nla

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-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190724191740.609212216@linuxfoundation.org>
Date:   Wed, 24 Jul 2019 21:16:08 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Aditya Pakki <pakki001@....edu>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 077/413] netfilter: ipset: fix a missing check of nla_parse

[ Upstream commit f4f5748bfec94cf418e49bf05f0c81a1b9ebc950 ]

When nla_parse fails, we should not use the results (the first
argument). The fix checks if it fails, and if so, returns its error code
upstream.

Signed-off-by: Aditya Pakki <pakki001@....edu>
Signed-off-by: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/netfilter/ipset/ip_set_core.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index 3cdf171cd468..16afa0df4004 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -1541,10 +1541,14 @@ call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set,
 		memcpy(&errmsg->msg, nlh, nlh->nlmsg_len);
 		cmdattr = (void *)&errmsg->msg + min_len;
 
-		nla_parse_deprecated(cda, IPSET_ATTR_CMD_MAX, cmdattr,
-				     nlh->nlmsg_len - min_len,
-				     ip_set_adt_policy, NULL);
+		ret = nla_parse_deprecated(cda, IPSET_ATTR_CMD_MAX, cmdattr,
+					   nlh->nlmsg_len - min_len,
+					   ip_set_adt_policy, NULL);
 
+		if (ret) {
+			nlmsg_free(skb2);
+			return ret;
+		}
 		errline = nla_data(cda[IPSET_ATTR_LINENO]);
 
 		*errline = lineno;
-- 
2.20.1