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selinux: wrap AVC state

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Wrap the AVC state within the selinux_state structure and
pass it explicitly to all AVC functions.  The AVC private state
is encapsulated in a selinux_avc structure that is referenced
from the selinux_state.

This change should have no effect on SELinux behavior or
APIs (userspace or LSM).

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Reviewed-by: James Morris <james.morris@microsoft.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Stephen Smalley
2018-03-05 11:47:56 -05:00
committed by Paul Moore
parent 0619f0f5e3
commit 6b6bc6205d
9 changed files with 512 additions and 297 deletions
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9
security/selinux/ss/services.c
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@@ -2151,7 +2151,7 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len)
state->initialized = 1;
seqno = ++state->ss->latest_granting;
selinux_complete_init();
avc_ss_reset(seqno);
avc_ss_reset(state->avc, seqno);
selnl_notify_policyload(seqno);
selinux_status_update_policyload(state, seqno);
selinux_netlbl_cache_invalidate();
@@ -2233,7 +2233,7 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len)
sidtab_destroy(&oldsidtab);
kfree(oldmapping);
avc_ss_reset(seqno);
avc_ss_reset(state->avc, seqno);
selnl_notify_policyload(seqno);
selinux_status_update_policyload(state, seqno);
selinux_netlbl_cache_invalidate();
@@ -2649,7 +2649,8 @@ out_unlock:
}
for (i = 0, j = 0; i < mynel; i++) {
struct av_decision dummy_avd;
rc = avc_has_perm_noaudit(fromsid, mysids[i],
rc = avc_has_perm_noaudit(state,
fromsid, mysids[i],
SECCLASS_PROCESS, /* kernel value */
PROCESS__TRANSITION, AVC_STRICT,
&dummy_avd);
@@ -2907,7 +2908,7 @@ int security_set_bools(struct selinux_state *state, int len, int *values)
out:
write_unlock_irq(&state->ss->policy_rwlock);
if (!rc) {
avc_ss_reset(seqno);
avc_ss_reset(state->avc, seqno);
selnl_notify_policyload(seqno);
selinux_status_update_policyload(state, seqno);
selinux_xfrm_notify_policyload();