From: Eric Paris Date: Tue, 23 Nov 2010 06:28:02 +0000 (+0000) Subject: SELinux: Only return netlink error when we know the return is fatal X-Git-Url: https://bbs.cooldavid.org/git/?p=net-next-2.6.git;a=commitdiff_plain;h=04f6d70f6e64900a5d70a5fc199dd9d5fa787738 SELinux: Only return netlink error when we know the return is fatal 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 Signed-off-by: Eric Paris Reviewed-by: Paul Moore Signed-off-by: David S. Miller --- diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 2c145f12d99..f590fb8e914 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -4589,7 +4589,7 @@ 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 { @@ -4602,7 +4602,7 @@ 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, @@ -4614,13 +4614,13 @@ 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);