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authorEric Dumazet <edumazet@google.com>2015-10-08 05:01:55 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-11 05:05:06 -0700
commite446f9dfe17bbaa76a1fe22912636f38be1e1af8 (patch)
tree8709e6157fe0a20b75dd88340f76f991cd3ae863 /security
parent21d11bd6f0f15c9c782d1f09557bb71f582a3f53 (diff)
downloadlinux-linaro-stable-e446f9dfe17bbaa76a1fe22912636f38be1e1af8.tar.gz
net: synack packets can be attached to request sockets
selinux needs few changes to accommodate fact that SYNACK messages can be attached to a request socket, lacking sk_security pointer (Only syncookies are still attached to a TCP_LISTEN socket) Adds a new sk_listener() helper, and use it in selinux and sch_fq Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported by: kernel test robot <ying.huang@linux.intel.com> Cc: Paul Moore <paul@paul-moore.com> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: Eric Paris <eparis@parisplace.org> Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 64340160f4ac..6e50841ef1f6 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4898,7 +4898,7 @@ static unsigned int selinux_ip_output(struct sk_buff *skb,
if (sk) {
struct sk_security_struct *sksec;
- if (sk->sk_state == TCP_LISTEN)
+ if (sk_listener(sk))
/* if the socket is the listening state then this
* packet is a SYN-ACK packet which means it needs to
* be labeled based on the connection/request_sock and
@@ -5005,7 +5005,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
* unfortunately, this means more work, but it is only once per
* connection. */
if (skb_dst(skb) != NULL && skb_dst(skb)->xfrm != NULL &&
- !(sk != NULL && sk->sk_state == TCP_LISTEN))
+ !(sk && sk_listener(sk)))
return NF_ACCEPT;
#endif
@@ -5022,7 +5022,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
secmark_perm = PACKET__SEND;
peer_sid = SECINITSID_KERNEL;
}
- } else if (sk->sk_state == TCP_LISTEN) {
+ } else if (sk_listener(sk)) {
/* Locally generated packet but the associated socket is in the
* listening state which means this is a SYN-ACK packet. In
* this particular case the correct security label is assigned
@@ -5033,7 +5033,11 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
* selinux_inet_conn_request(). See also selinux_ip_output()
* for similar problems. */
u32 skb_sid;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec;
+
+ if (sk->sk_state == TCP_NEW_SYN_RECV)
+ sk = inet_reqsk(sk)->rsk_listener;
+ sksec = sk->sk_security;
if (selinux_skb_peerlbl_sid(skb, family, &skb_sid))
return NF_DROP;
/* At this point, if the returned skb peerlbl is SECSID_NULL