diff options
| -rw-r--r-- | security/selinux/hooks.c | 2 | ||||
| -rw-r--r-- | security/selinux/include/xfrm.h | 9 | ||||
| -rw-r--r-- | security/selinux/xfrm.c | 53 |
3 files changed, 48 insertions, 16 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 87c8e20c468..ec39490ec8f 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3723,7 +3723,7 @@ static int selinux_skb_peerlbl_sid(struct sk_buff *skb, u16 family, u32 *sid) u32 nlbl_sid; u32 nlbl_type; - selinux_skb_xfrm_sid(skb, &xfrm_sid); + selinux_xfrm_skb_sid(skb, &xfrm_sid); selinux_netlbl_skbuff_getsid(skb, family, &nlbl_type, &nlbl_sid); err = security_net_peersid_resolve(nlbl_sid, nlbl_type, xfrm_sid, sid); diff --git a/security/selinux/include/xfrm.h b/security/selinux/include/xfrm.h index 65f67cb0aef..3ffdadc9960 100644 --- a/security/selinux/include/xfrm.h +++ b/security/selinux/include/xfrm.h @@ -47,6 +47,7 @@ int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb, int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb, struct common_audit_data *ad, u8 proto); int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall); +int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid); static inline void selinux_xfrm_notify_policyload(void) { @@ -80,12 +81,12 @@ static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int static inline void selinux_xfrm_notify_policyload(void) { } -#endif -static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid) +static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid) { - int err = selinux_xfrm_decode_session(skb, sid, 0); - BUG_ON(err); + *sid = SECSID_NULL; + return 0; } +#endif #endif /* _SELINUX_XFRM_H_ */ diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c index d0308188621..78504a18958 100644 --- a/security/selinux/xfrm.c +++ b/security/selinux/xfrm.c @@ -152,21 +152,13 @@ int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x, struct xfrm_policy * return rc; } -/* - * LSM hook implementation that checks and/or returns the xfrm sid for the - * incoming packet. - */ - -int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall) +static int selinux_xfrm_skb_sid_ingress(struct sk_buff *skb, + u32 *sid, int ckall) { - struct sec_path *sp; + struct sec_path *sp = skb->sp; *sid = SECSID_NULL; - if (skb == NULL) - return 0; - - sp = skb->sp; if (sp) { int i, sid_set = 0; @@ -190,6 +182,45 @@ int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall) return 0; } +static u32 selinux_xfrm_skb_sid_egress(struct sk_buff *skb) +{ + struct dst_entry *dst = skb_dst(skb); + struct xfrm_state *x; + + if (dst == NULL) + return SECSID_NULL; + x = dst->xfrm; + if (x == NULL || !selinux_authorizable_xfrm(x)) + return SECSID_NULL; + + return x->security->ctx_sid; +} + +/* + * LSM hook implementation that checks and/or returns the xfrm sid for the + * incoming packet. + */ + +int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall) +{ + if (skb == NULL) { + *sid = SECSID_NULL; + return 0; + } + return selinux_xfrm_skb_sid_ingress(skb, sid, ckall); +} + +int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid) +{ + int rc; + + rc = selinux_xfrm_skb_sid_ingress(skb, sid, 0); + if (rc == 0 && *sid == SECSID_NULL) + *sid = selinux_xfrm_skb_sid_egress(skb); + + return rc; +} + /* * Security blob allocation for xfrm_policy and xfrm_state * CTX does not have a meaningful value on input |