From: Casey Schaufler <casey@schaufler-ca.com>
To: casey@schaufler-ca.com, linux-security-module@vger.kernel.org,
SMACK-discuss@lists.01.org
Subject: [PATCH] Smack: Fix IPv6 handling of 0 secmark
Date: Wed, 3 Apr 2019 15:01:21 -0700 [thread overview]
Message-ID: <20190403220121.1868-1-casey@schaufler-ca.com> (raw)
Handle the case where the skb for an IPv6 packet contains
a 0 in the secmark for a packet generated locally. This
can only happen for system packets, so allow the access.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
security/smack/smack_lsm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index bd45c9139d34..b9abcdb36a73 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3907,6 +3907,8 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
#ifdef SMACK_IPV6_SECMARK_LABELING
if (skb && skb->secmark != 0)
skp = smack_from_secid(skb->secmark);
+ else if (smk_ipv6_localhost(&sadd))
+ break;
else
skp = smack_ipv6host_label(&sadd);
if (skp == NULL)
--
2.19.1
reply other threads:[~2019-04-03 22:01 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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