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https://github.com/torvalds/linux
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03e1ad7b5d
The xfrm_get_policy() and xfrm_add_pol_expire() put some rather large structs on the stack to work around the LSM API. This patch attempts to fix that problem by changing the LSM API to require only the relevant "security" pointers instead of the entire SPD entry; we do this for all of the security_xfrm_policy*() functions to keep things consistent. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
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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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int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
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struct xfrm_user_sec_ctx *sec_ctx);
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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 *sec_ctx, 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, struct flowi *fl);
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/*
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* Extract the security blob from the sock (it's actually on the socket)
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*/
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static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
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{
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if (!sk->sk_socket)
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return NULL;
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return SOCK_INODE(sk->sk_socket)->i_security;
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}
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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 sid, struct sk_buff *skb,
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struct avc_audit_data *ad);
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int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
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struct avc_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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static inline void selinux_xfrm_notify_policyload(void)
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{
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atomic_inc(&flow_cache_genid);
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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 isec_sid, struct sk_buff *skb,
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struct avc_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 isec_sid, struct sk_buff *skb,
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struct avc_audit_data *ad, 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, 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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#endif
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static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
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{
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int err = selinux_xfrm_decode_session(skb, sid, 0);
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BUG_ON(err);
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}
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#endif /* _SELINUX_XFRM_H_ */
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