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selinux: cleanup selinux_xfrm_decode_session() 

Some basic simplification.

Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Paul Moore 2013-07-23 17:38:40 -04:00 committed by Eric Paris
parent 4baabeec2a
commit e219369580
1 changed files with 12 additions and 11 deletions
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23
security/selinux/xfrm.c
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@ -215,34 +215,35 @@ int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
*/
int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
{
u32 sid_session = SECSID_NULL;
struct sec_path *sp;
*sid = SECSID_NULL;
if (skb == NULL)
return 0;
goto out;
sp = skb->sp;
if (sp) {
int i, sid_set = 0;
int i;
for (i = sp->len-1; i >= 0; i--) {
for (i = sp->len - 1; i >= 0; i--) {
struct xfrm_state *x = sp->xvec[i];
if (selinux_authorizable_xfrm(x)) {
struct xfrm_sec_ctx *ctx = x->security;
if (!sid_set) {
*sid = ctx->ctx_sid;
sid_set = 1;
if (sid_session == SECSID_NULL) {
sid_session = ctx->ctx_sid;
if (!ckall)
break;
} else if (*sid != ctx->ctx_sid)
goto out;
} else if (sid_session != ctx->ctx_sid) {
*sid = SECSID_NULL;
return -EINVAL;
}
}
}
}
out:
*sid = sid_session;
return 0;
}