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-rw-r--r--net/xfrm/xfrm_input.c3
-rw-r--r--net/xfrm/xfrm_output.c2
-rw-r--r--net/xfrm/xfrm_policy.c14
-rw-r--r--net/xfrm/xfrm_state.c153
4 files changed, 147 insertions, 25 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 493243fc5fe5..1b250f33ad5b 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -147,6 +147,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
x = xfrm_state_lookup(daddr, spi, nexthdr, family);
if (x == NULL) {
XFRM_INC_STATS(LINUX_MIB_XFRMINNOSTATES);
+ xfrm_audit_state_notfound(skb, family, spi, seq);
goto drop;
}
@@ -163,7 +164,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
goto drop_unlock;
}
- if (x->props.replay_window && xfrm_replay_check(x, seq)) {
+ if (x->props.replay_window && xfrm_replay_check(x, skb, seq)) {
XFRM_INC_STATS(LINUX_MIB_XFRMINSEQOUTOFWINDOW);
goto drop_unlock;
}
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 867484a046af..09514449fe8a 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -57,6 +57,8 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
if (x->type->flags & XFRM_TYPE_REPLAY_PROT) {
XFRM_SKB_CB(skb)->seq = ++x->replay.oseq;
+ if (unlikely(x->replay.oseq == 0))
+ xfrm_audit_state_replay_overflow(x, skb);
if (xfrm_aevent_is_on())
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index abc3e39b115b..280f8ded975c 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2407,12 +2407,11 @@ void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
{
struct audit_buffer *audit_buf;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, secid);
+ audit_buf = xfrm_audit_start("SPD-add");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SPD-add res=%u", result);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
xfrm_audit_common_policyinfo(xp, audit_buf);
audit_log_end(audit_buf);
}
@@ -2423,12 +2422,11 @@ void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
{
struct audit_buffer *audit_buf;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, secid);
+ audit_buf = xfrm_audit_start("SPD-delete");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SPD-delete res=%u", result);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
xfrm_audit_common_policyinfo(xp, audit_buf);
audit_log_end(audit_buf);
}
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 9e57378c51df..6bf876c866df 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -61,6 +61,13 @@ static unsigned int xfrm_state_genid;
static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
+#ifdef CONFIG_AUDITSYSCALL
+static void xfrm_audit_state_replay(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq);
+#else
+#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
+#endif /* CONFIG_AUDITSYSCALL */
+
static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
xfrm_address_t *saddr,
u32 reqid,
@@ -1609,13 +1616,14 @@ static void xfrm_replay_timer_handler(unsigned long data)
spin_unlock(&x->lock);
}
-int xfrm_replay_check(struct xfrm_state *x, __be32 net_seq)
+int xfrm_replay_check(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
{
u32 diff;
u32 seq = ntohl(net_seq);
if (unlikely(seq == 0))
- return -EINVAL;
+ goto err;
if (likely(seq > x->replay.seq))
return 0;
@@ -1624,14 +1632,18 @@ int xfrm_replay_check(struct xfrm_state *x, __be32 net_seq)
if (diff >= min_t(unsigned int, x->props.replay_window,
sizeof(x->replay.bitmap) * 8)) {
x->stats.replay_window++;
- return -EINVAL;
+ goto err;
}
if (x->replay.bitmap & (1U << diff)) {
x->stats.replay++;
- return -EINVAL;
+ goto err;
}
return 0;
+
+err:
+ xfrm_audit_state_replay(x, skb, net_seq);
+ return -EINVAL;
}
EXPORT_SYMBOL(xfrm_replay_check);
@@ -1996,8 +2008,8 @@ void __init xfrm_state_init(void)
}
#ifdef CONFIG_AUDITSYSCALL
-static inline void xfrm_audit_common_stateinfo(struct xfrm_state *x,
- struct audit_buffer *audit_buf)
+static inline void xfrm_audit_helper_sainfo(struct xfrm_state *x,
+ struct audit_buffer *audit_buf)
{
struct xfrm_sec_ctx *ctx = x->security;
u32 spi = ntohl(x->id.spi);
@@ -2024,18 +2036,45 @@ static inline void xfrm_audit_common_stateinfo(struct xfrm_state *x,
audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
}
+static inline void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
+ struct audit_buffer *audit_buf)
+{
+ struct iphdr *iph4;
+ struct ipv6hdr *iph6;
+
+ switch (family) {
+ case AF_INET:
+ iph4 = ip_hdr(skb);
+ audit_log_format(audit_buf,
+ " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
+ NIPQUAD(iph4->saddr),
+ NIPQUAD(iph4->daddr));
+ break;
+ case AF_INET6:
+ iph6 = ipv6_hdr(skb);
+ audit_log_format(audit_buf,
+ " src=" NIP6_FMT " dst=" NIP6_FMT
+ " flowlbl=0x%x%x%x",
+ NIP6(iph6->saddr),
+ NIP6(iph6->daddr),
+ iph6->flow_lbl[0] & 0x0f,
+ iph6->flow_lbl[1],
+ iph6->flow_lbl[2]);
+ break;
+ }
+}
+
void xfrm_audit_state_add(struct xfrm_state *x, int result,
u32 auid, u32 secid)
{
struct audit_buffer *audit_buf;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, secid);
+ audit_buf = xfrm_audit_start("SAD-add");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SAD-add res=%u", result);
- xfrm_audit_common_stateinfo(x, audit_buf);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
@@ -2045,14 +2084,96 @@ void xfrm_audit_state_delete(struct xfrm_state *x, int result,
{
struct audit_buffer *audit_buf;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, secid);
+ audit_buf = xfrm_audit_start("SAD-delete");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SAD-delete res=%u", result);
- xfrm_audit_common_stateinfo(x, audit_buf);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
+
+void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
+ struct sk_buff *skb)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-replay-overflow");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ /* don't record the sequence number because it's inherent in this kind
+ * of audit message */
+ spi = ntohl(x->id.spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
+
+static void xfrm_audit_state_replay(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-replayed-pkt");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ spi = ntohl(x->id.spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ audit_log_end(audit_buf);
+}
+
+void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SA-notfound");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, family, audit_buf);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
+
+void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
+ __be32 net_spi, __be32 net_seq)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-notfound");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, family, audit_buf);
+ spi = ntohl(net_spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
+
+void xfrm_audit_state_icvfail(struct xfrm_state *x,
+ struct sk_buff *skb, u8 proto)
+{
+ struct audit_buffer *audit_buf;
+ __be32 net_spi;
+ __be32 net_seq;
+
+ audit_buf = xfrm_audit_start("SA-icv-failure");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
+ u32 spi = ntohl(net_spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ }
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
#endif /* CONFIG_AUDITSYSCALL */
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-08 19:50:18 +0000