5 files changed, 121 insertions, 13 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 90185e8b335..311f25af5e1 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -964,7 +964,7 @@ struct xfrmk_spdinfo {
 
 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
 extern int xfrm_state_delete(struct xfrm_state *x);
-extern void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info);
+extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info);
 extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si);
 extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si);
 extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq);
@@ -1020,13 +1020,13 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
                                           struct xfrm_sec_ctx *ctx, int delete,
                                           int *err);
 struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err);
-void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
+int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
 u32 xfrm_get_acqseq(void);
 void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi);
 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
                                   xfrm_address_t *daddr, xfrm_address_t *saddr,
                                   int create, unsigned short family);
-extern void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
+extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
 extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
                           struct flowi *fl, int family, int strict);
diff --git a/net/key/af_key.c b/net/key/af_key.c
index d302ddae580..0f8304b0246 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1682,6 +1682,7 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
         unsigned proto;
         struct km_event c;
         struct xfrm_audit audit_info;
+        int err;
 
         proto = pfkey_satype2proto(hdr->sadb_msg_satype);
         if (proto == 0)
@@ -1689,7 +1690,9 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
 
         audit_info.loginuid = audit_get_loginuid(current->audit_context);
         audit_info.secid = 0;
-        xfrm_state_flush(proto, &audit_info);
+        err = xfrm_state_flush(proto, &audit_info);
+        if (err)
+                return err;
         c.data.proto = proto;
         c.seq = hdr->sadb_msg_seq;
         c.pid = hdr->sadb_msg_pid;
@@ -2683,10 +2686,13 @@ static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg
 {
         struct km_event c;
         struct xfrm_audit audit_info;
+        int err;
 
         audit_info.loginuid = audit_get_loginuid(current->audit_context);
         audit_info.secid = 0;
-        xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
+        err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
+        if (err)
+                return err;
         c.data.type = XFRM_POLICY_TYPE_MAIN;
         c.event = XFRM_MSG_FLUSHPOLICY;
         c.pid = hdr->sadb_msg_pid;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 64a375178c5..157bfbd250b 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -834,11 +834,67 @@ struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
 }
 EXPORT_SYMBOL(xfrm_policy_byid);
 
-void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+static inline int
+xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
 {
-        int dir;
+        int dir, err = 0;
+
+        for (dir = 0; dir < XFRM_POLICY_MAX; dir++) {
+                struct xfrm_policy *pol;
+                struct hlist_node *entry;
+                int i;
+
+                hlist_for_each_entry(pol, entry,
+                                     &xfrm_policy_inexact[dir], bydst) {
+                        if (pol->type != type)
+                                continue;
+                        err = security_xfrm_policy_delete(pol);
+                        if (err) {
+                                xfrm_audit_log(audit_info->loginuid,
+                                               audit_info->secid,
+                                               AUDIT_MAC_IPSEC_DELSPD, 0,
+                                               pol, NULL);
+                                return err;
+                        }
+                }
+                for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
+                        hlist_for_each_entry(pol, entry,
+                                             xfrm_policy_bydst[dir].table + i,
+                                             bydst) {
+                                if (pol->type != type)
+                                        continue;
+                                err = security_xfrm_policy_delete(pol);
+                                if (err) {
+                                        xfrm_audit_log(audit_info->loginuid,
+                                                       audit_info->secid,
+                                                       AUDIT_MAC_IPSEC_DELSPD,
+                                                       0, pol, NULL);
+                                        return err;
+                                }
+                        }
+                }
+        }
+        return err;
+}
+#else
+static inline int
+xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
+{
+        return 0;
+}
+#endif
+
+int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
+{
+        int dir, err = 0;
 
         write_lock_bh(&xfrm_policy_lock);
+
+        err = xfrm_policy_flush_secctx_check(type, audit_info);
+        if (err)
+                goto out;
+
         for (dir = 0; dir < XFRM_POLICY_MAX; dir++) {
                 struct xfrm_policy *pol;
                 struct hlist_node *entry;
@@ -891,7 +947,9 @@ void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
                 xfrm_policy_count[dir] -= killed;
         }
         atomic_inc(&flow_cache_genid);
+out:
         write_unlock_bh(&xfrm_policy_lock);
+        return err;
 }
 EXPORT_SYMBOL(xfrm_policy_flush);
 
@@ -2583,4 +2641,3 @@ restore_state:
 }
 EXPORT_SYMBOL(xfrm_migrate);
 #endif
-
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 372f06eb8bb..85f3f43a6cc 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -391,12 +391,48 @@ int xfrm_state_delete(struct xfrm_state *x)
 }
 EXPORT_SYMBOL(xfrm_state_delete);
 
-void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+static inline int
+xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
 {
-        int i;
-        int err = 0;
+        int i, err = 0;
+
+        for (i = 0; i <= xfrm_state_hmask; i++) {
+                struct hlist_node *entry;
+                struct xfrm_state *x;
+
+                hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
+                        if (xfrm_id_proto_match(x->id.proto, proto) &&
+                           (err = security_xfrm_state_delete(x)) != 0) {
+                                xfrm_audit_log(audit_info->loginuid,
+                                               audit_info->secid,
+                                               AUDIT_MAC_IPSEC_DELSA,
+                                               0, NULL, x);
+
+                                return err;
+                        }
+                }
+        }
+
+        return err;
+}
+#else
+static inline int
+xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
+{
+        return 0;
+}
+#endif
+
+int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
+{
+        int i, err = 0;
 
         spin_lock_bh(&xfrm_state_lock);
+        err = xfrm_state_flush_secctx_check(proto, audit_info);
+        if (err)
+                goto out;
+
         for (i = 0; i <= xfrm_state_hmask; i++) {
                 struct hlist_node *entry;
                 struct xfrm_state *x;
@@ -419,8 +455,12 @@ restart:
                         }
                 }
         }
+        err = 0;
+
+out:
         spin_unlock_bh(&xfrm_state_lock);
         wake_up(&km_waitq);
+        return err;
 }
 EXPORT_SYMBOL(xfrm_state_flush);
 
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index b14c7e590c3..c06883bf620 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1418,10 +1418,13 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
         struct km_event c;
         struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
         struct xfrm_audit audit_info;
+        int err;
 
         audit_info.loginuid = NETLINK_CB(skb).loginuid;
         audit_info.secid = NETLINK_CB(skb).sid;
-        xfrm_state_flush(p->proto, &audit_info);
+        err = xfrm_state_flush(p->proto, &audit_info);
+        if (err)
+                return err;
         c.data.proto = p->proto;
         c.event = nlh->nlmsg_type;
         c.seq = nlh->nlmsg_seq;
@@ -1582,7 +1585,9 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
 
         audit_info.loginuid = NETLINK_CB(skb).loginuid;
         audit_info.secid = NETLINK_CB(skb).sid;
-        xfrm_policy_flush(type, &audit_info);
+        err = xfrm_policy_flush(type, &audit_info);
+        if (err)
+                return err;
         c.data.type = type;
         c.event = nlh->nlmsg_type;
         c.seq = nlh->nlmsg_seq;