Some of the SELinux netlink code returns a fatal error when the error might
actually be transient. This patch just silently drops packets on
potentially transient errors but continues to return a permanant error
indicator when the denial was because of policy.
Based-on-comments-by: Paul Moore <paul.moore@xxxxxx>
Signed-off-by: Eric Paris <eparis@xxxxxxxxxx>
---
security/selinux/hooks.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index a0bc5c0..bd6dc16 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4594,7 +4594,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
}
if (secmark_perm == PACKET__FORWARD_OUT) {
if (selinux_skb_peerlbl_sid(skb, family, &peer_sid))
- return NF_DROP_ERR(-ECONNREFUSED);
+ return NF_DROP;
} else
peer_sid = SECINITSID_KERNEL;
} else {
@@ -4607,7 +4607,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
ad.u.net.netif = ifindex;
ad.u.net.family = family;
if (selinux_parse_skb(skb, &ad, &addrp, 0, NULL))
- return NF_DROP_ERR(-ECONNREFUSED);
+ return NF_DROP;
if (secmark_active)
if (avc_has_perm(peer_sid, skb->secmark,
@@ -4619,13 +4619,13 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
u32 node_sid;
if (sel_netif_sid(ifindex, &if_sid))
- return NF_DROP_ERR(-ECONNREFUSED);
+ return NF_DROP;
if (avc_has_perm(peer_sid, if_sid,
SECCLASS_NETIF, NETIF__EGRESS, &ad))
return NF_DROP_ERR(-ECONNREFUSED);
if (sel_netnode_sid(addrp, family, &node_sid))
- return NF_DROP_ERR(-ECONNREFUSED);
+ return NF_DROP;
if (avc_has_perm(peer_sid, node_sid,
SECCLASS_NODE, NODE__SENDTO, &ad))
return NF_DROP_ERR(-ECONNREFUSED);
--
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