forked from luck/tmp_suning_uos_patched
52a4c6404f
security_xfrm_policy_alloc can be called in atomic context so the allocation should be done with GFP_ATOMIC. Add an argument to let the callers choose the appropriate way. In order to do so a gfp argument needs to be added to the method xfrm_policy_alloc_security in struct security_operations and to the internal function selinux_xfrm_alloc_user. After that switch to GFP_ATOMIC in the atomic callers and leave GFP_KERNEL as before for the rest. The path that needed the gfp argument addition is: security_xfrm_policy_alloc -> security_ops.xfrm_policy_alloc_security -> all users of xfrm_policy_alloc_security (e.g. selinux_xfrm_policy_alloc) -> selinux_xfrm_alloc_user (here the allocation used to be GFP_KERNEL only) Now adding a gfp argument to selinux_xfrm_alloc_user requires us to also add it to security_context_to_sid which is used inside and prior to this patch did only GFP_KERNEL allocation. So add gfp argument to security_context_to_sid and adjust all of its callers as well. CC: Paul Moore <paul@paul-moore.com> CC: Dave Jones <davej@redhat.com> CC: Steffen Klassert <steffen.klassert@secunet.com> CC: Fan Du <fan.du@windriver.com> CC: David S. Miller <davem@davemloft.net> CC: LSM list <linux-security-module@vger.kernel.org> CC: SELinux list <selinux@tycho.nsa.gov> Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
|
|
* SELinux support for the XFRM LSM hooks
|
|
*
|
|
* Author : Trent Jaeger, <jaegert@us.ibm.com>
|
|
* Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
|
|
*/
|
|
#ifndef _SELINUX_XFRM_H_
|
|
#define _SELINUX_XFRM_H_
|
|
|
|
#include <net/flow.h>
|
|
|
|
int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
|
|
struct xfrm_user_sec_ctx *uctx,
|
|
gfp_t gfp);
|
|
int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
|
|
struct xfrm_sec_ctx **new_ctxp);
|
|
void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
|
|
int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
|
|
int selinux_xfrm_state_alloc(struct xfrm_state *x,
|
|
struct xfrm_user_sec_ctx *uctx);
|
|
int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
|
|
struct xfrm_sec_ctx *polsec, u32 secid);
|
|
void selinux_xfrm_state_free(struct xfrm_state *x);
|
|
int selinux_xfrm_state_delete(struct xfrm_state *x);
|
|
int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
|
|
int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
|
|
struct xfrm_policy *xp,
|
|
const struct flowi *fl);
|
|
|
|
#ifdef CONFIG_SECURITY_NETWORK_XFRM
|
|
extern atomic_t selinux_xfrm_refcount;
|
|
|
|
static inline int selinux_xfrm_enabled(void)
|
|
{
|
|
return (atomic_read(&selinux_xfrm_refcount) > 0);
|
|
}
|
|
|
|
int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
|
|
struct common_audit_data *ad);
|
|
int selinux_xfrm_postroute_last(u32 sk_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)
|
|
{
|
|
struct net *net;
|
|
|
|
atomic_inc(&flow_cache_genid);
|
|
rtnl_lock();
|
|
for_each_net(net)
|
|
rt_genid_bump_all(net);
|
|
rtnl_unlock();
|
|
}
|
|
#else
|
|
static inline int selinux_xfrm_enabled(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
|
|
struct common_audit_data *ad)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
|
|
struct common_audit_data *ad,
|
|
u8 proto)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
|
|
int ckall)
|
|
{
|
|
*sid = SECSID_NULL;
|
|
return 0;
|
|
}
|
|
|
|
static inline void selinux_xfrm_notify_policyload(void)
|
|
{
|
|
}
|
|
|
|
static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
|
|
{
|
|
*sid = SECSID_NULL;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SELINUX_XFRM_H_ */
|