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3df98d7921
As pointed out by Herbert in a recent related patch, the LSM hooks do not have the necessary address family information to use the flowi struct safely. As none of the LSMs currently use any of the protocol specific flowi information, replace the flowi pointers with pointers to the address family independent flowi_common struct. Reported-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: James Morris <jamorris@linux.microsoft.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* SELinux support for the XFRM LSM hooks
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*
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* Author : Trent Jaeger, <jaegert@us.ibm.com>
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* Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
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*/
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#ifndef _SELINUX_XFRM_H_
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#define _SELINUX_XFRM_H_
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#include <net/flow.h>
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int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
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struct xfrm_user_sec_ctx *uctx,
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gfp_t gfp);
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int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
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struct xfrm_sec_ctx **new_ctxp);
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void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
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int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
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int selinux_xfrm_state_alloc(struct xfrm_state *x,
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struct xfrm_user_sec_ctx *uctx);
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int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
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struct xfrm_sec_ctx *polsec, u32 secid);
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void selinux_xfrm_state_free(struct xfrm_state *x);
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int selinux_xfrm_state_delete(struct xfrm_state *x);
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int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
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int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
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struct xfrm_policy *xp,
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const struct flowi_common *flic);
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#ifdef CONFIG_SECURITY_NETWORK_XFRM
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extern atomic_t selinux_xfrm_refcount;
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static inline int selinux_xfrm_enabled(void)
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{
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return (atomic_read(&selinux_xfrm_refcount) > 0);
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}
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int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
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struct common_audit_data *ad);
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int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
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struct common_audit_data *ad, u8 proto);
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int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
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int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid);
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static inline void selinux_xfrm_notify_policyload(void)
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{
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struct net *net;
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down_read(&net_rwsem);
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for_each_net(net)
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rt_genid_bump_all(net);
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up_read(&net_rwsem);
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}
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#else
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static inline int selinux_xfrm_enabled(void)
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{
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return 0;
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}
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static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
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struct common_audit_data *ad)
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{
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return 0;
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}
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static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
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struct common_audit_data *ad,
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u8 proto)
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{
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return 0;
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}
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static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
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int ckall)
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{
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*sid = SECSID_NULL;
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return 0;
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}
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static inline void selinux_xfrm_notify_policyload(void)
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{
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}
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static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
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{
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*sid = SECSID_NULL;
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return 0;
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}
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#endif
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#endif /* _SELINUX_XFRM_H_ */
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