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-rw-r--r--include/trace/events/rxrpc.h5
-rw-r--r--net/rxrpc/ar-internal.h1
-rw-r--r--net/rxrpc/call_event.c19
-rw-r--r--net/rxrpc/conn_event.c29
-rw-r--r--net/rxrpc/io_thread.c24
-rw-r--r--net/rxrpc/key.c4
-rw-r--r--net/rxrpc/rxgk_app.c2
-rw-r--r--net/rxrpc/rxgk_common.h1
-rw-r--r--net/rxrpc/rxkad.c112
-rw-r--r--net/rxrpc/skbuff.c9
10 files changed, 106 insertions, 100 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 578b8038b211..13b9d017f8e1 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -37,6 +37,7 @@
EM(rxkad_abort_1_short_encdata, "rxkad1-short-encdata") \
EM(rxkad_abort_1_short_header, "rxkad1-short-hdr") \
EM(rxkad_abort_2_short_check, "rxkad2-short-check") \
+ EM(rxkad_abort_2_crypto_unaligned, "rxkad2-crypto-unaligned") \
EM(rxkad_abort_2_short_data, "rxkad2-short-data") \
EM(rxkad_abort_2_short_header, "rxkad2-short-hdr") \
EM(rxkad_abort_2_short_len, "rxkad2-short-len") \
@@ -161,8 +162,6 @@
E_(rxrpc_call_poke_timer_now, "Timer-now")
#define rxrpc_skb_traces \
- EM(rxrpc_skb_eaten_by_unshare, "ETN unshare ") \
- EM(rxrpc_skb_eaten_by_unshare_nomem, "ETN unshar-nm") \
EM(rxrpc_skb_get_call_rx, "GET call-rx ") \
EM(rxrpc_skb_get_conn_secured, "GET conn-secd") \
EM(rxrpc_skb_get_conn_work, "GET conn-work") \
@@ -189,6 +188,7 @@
EM(rxrpc_skb_put_purge, "PUT purge ") \
EM(rxrpc_skb_put_purge_oob, "PUT purge-oob") \
EM(rxrpc_skb_put_response, "PUT response ") \
+ EM(rxrpc_skb_put_response_copy, "PUT resp-cpy ") \
EM(rxrpc_skb_put_rotate, "PUT rotate ") \
EM(rxrpc_skb_put_unknown, "PUT unknown ") \
EM(rxrpc_skb_see_conn_work, "SEE conn-work") \
@@ -197,6 +197,7 @@
EM(rxrpc_skb_see_recvmsg_oob, "SEE recvm-oob") \
EM(rxrpc_skb_see_reject, "SEE reject ") \
EM(rxrpc_skb_see_rotate, "SEE rotate ") \
+ EM(rxrpc_skb_see_unshare_nomem, "SEE unshar-nm") \
E_(rxrpc_skb_see_version, "SEE version ")
#define rxrpc_local_traces \
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 96ecb83c9071..27c2aa2dd023 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -1486,7 +1486,6 @@ int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
-void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
void rxrpc_purge_queue(struct sk_buff_head *);
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index fec59d9338b9..cc8f9dfa44e8 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -332,7 +332,24 @@ bool rxrpc_input_call_event(struct rxrpc_call *call)
saw_ack |= sp->hdr.type == RXRPC_PACKET_TYPE_ACK;
- rxrpc_input_call_packet(call, skb);
+ if (sp->hdr.securityIndex != 0 &&
+ skb_cloned(skb)) {
+ /* Unshare the packet so that it can be
+ * modified by in-place decryption.
+ */
+ struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC);
+
+ if (nskb) {
+ rxrpc_new_skb(nskb, rxrpc_skb_new_unshared);
+ rxrpc_input_call_packet(call, nskb);
+ rxrpc_free_skb(nskb, rxrpc_skb_put_call_rx);
+ } else {
+ /* OOM - Drop the packet. */
+ rxrpc_see_skb(skb, rxrpc_skb_see_unshare_nomem);
+ }
+ } else {
+ rxrpc_input_call_packet(call, skb);
+ }
rxrpc_free_skb(skb, rxrpc_skb_put_call_rx);
did_receive = true;
}
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 9a41ec708aeb..aee977291d90 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -240,6 +240,33 @@ static void rxrpc_call_is_secure(struct rxrpc_call *call)
rxrpc_notify_socket(call);
}
+static int rxrpc_verify_response(struct rxrpc_connection *conn,
+ struct sk_buff *skb)
+{
+ int ret;
+
+ if (skb_cloned(skb)) {
+ /* Copy the packet if shared so that we can do in-place
+ * decryption.
+ */
+ struct sk_buff *nskb = skb_copy(skb, GFP_NOFS);
+
+ if (nskb) {
+ rxrpc_new_skb(nskb, rxrpc_skb_new_unshared);
+ ret = conn->security->verify_response(conn, nskb);
+ rxrpc_free_skb(nskb, rxrpc_skb_put_response_copy);
+ } else {
+ /* OOM - Drop the packet. */
+ rxrpc_see_skb(skb, rxrpc_skb_see_unshare_nomem);
+ ret = -ENOMEM;
+ }
+ } else {
+ ret = conn->security->verify_response(conn, skb);
+ }
+
+ return ret;
+}
+
/*
* connection-level Rx packet processor
*/
@@ -270,7 +297,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
}
spin_unlock_irq(&conn->state_lock);
- ret = conn->security->verify_response(conn, skb);
+ ret = rxrpc_verify_response(conn, skb);
if (ret < 0)
return ret;
diff --git a/net/rxrpc/io_thread.c b/net/rxrpc/io_thread.c
index 697956931925..dc5184a2fa9d 100644
--- a/net/rxrpc/io_thread.c
+++ b/net/rxrpc/io_thread.c
@@ -192,13 +192,12 @@ static bool rxrpc_extract_abort(struct sk_buff *skb)
/*
* Process packets received on the local endpoint
*/
-static bool rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff **_skb)
+static bool rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
struct rxrpc_connection *conn;
struct sockaddr_rxrpc peer_srx;
struct rxrpc_skb_priv *sp;
struct rxrpc_peer *peer = NULL;
- struct sk_buff *skb = *_skb;
bool ret = false;
skb_pull(skb, sizeof(struct udphdr));
@@ -244,25 +243,6 @@ static bool rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff **_skb)
return rxrpc_bad_message(skb, rxrpc_badmsg_zero_call);
if (sp->hdr.seq == 0)
return rxrpc_bad_message(skb, rxrpc_badmsg_zero_seq);
-
- /* Unshare the packet so that it can be modified for in-place
- * decryption.
- */
- if (sp->hdr.securityIndex != 0) {
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb) {
- rxrpc_eaten_skb(*_skb, rxrpc_skb_eaten_by_unshare_nomem);
- *_skb = NULL;
- return just_discard;
- }
-
- if (skb != *_skb) {
- rxrpc_eaten_skb(*_skb, rxrpc_skb_eaten_by_unshare);
- *_skb = skb;
- rxrpc_new_skb(skb, rxrpc_skb_new_unshared);
- sp = rxrpc_skb(skb);
- }
- }
break;
case RXRPC_PACKET_TYPE_CHALLENGE:
@@ -494,7 +474,7 @@ int rxrpc_io_thread(void *data)
switch (skb->mark) {
case RXRPC_SKB_MARK_PACKET:
skb->priority = 0;
- if (!rxrpc_input_packet(local, &skb))
+ if (!rxrpc_input_packet(local, skb))
rxrpc_reject_packet(local, skb);
trace_rxrpc_rx_done(skb->mark, skb->priority);
rxrpc_free_skb(skb, rxrpc_skb_put_input);
diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c
index 6301d79ee35a..3ec3d89fdf14 100644
--- a/net/rxrpc/key.c
+++ b/net/rxrpc/key.c
@@ -502,6 +502,10 @@ static int rxrpc_preparse(struct key_preparsed_payload *prep)
if (v1->security_index != RXRPC_SECURITY_RXKAD)
goto error;
+ ret = -EKEYREJECTED;
+ if (v1->ticket_length > AFSTOKEN_RK_TIX_MAX)
+ goto error;
+
plen = sizeof(*token->kad) + v1->ticket_length;
prep->quotalen += plen + sizeof(*token);
diff --git a/net/rxrpc/rxgk_app.c b/net/rxrpc/rxgk_app.c
index 30275cb5ba3e..5587639d60c5 100644
--- a/net/rxrpc/rxgk_app.c
+++ b/net/rxrpc/rxgk_app.c
@@ -214,7 +214,7 @@ int rxgk_extract_token(struct rxrpc_connection *conn, struct sk_buff *skb,
ticket_len = ntohl(container.token_len);
ticket_offset = token_offset + sizeof(container);
- if (xdr_round_up(ticket_len) > token_len - sizeof(container))
+ if (ticket_len > xdr_round_down(token_len - sizeof(container)))
goto short_packet;
_debug("KVNO %u", kvno);
diff --git a/net/rxrpc/rxgk_common.h b/net/rxrpc/rxgk_common.h
index 80164d89e19c..1e257d7ab8ec 100644
--- a/net/rxrpc/rxgk_common.h
+++ b/net/rxrpc/rxgk_common.h
@@ -34,6 +34,7 @@ struct rxgk_context {
};
#define xdr_round_up(x) (round_up((x), sizeof(__be32)))
+#define xdr_round_down(x) (round_down((x), sizeof(__be32)))
#define xdr_object_len(x) (4 + xdr_round_up(x))
/*
diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index eb7f2769d2b1..cba7935977f0 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -510,6 +510,9 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb,
return rxrpc_abort_eproto(call, skb, RXKADSEALEDINCON,
rxkad_abort_2_short_header);
+ /* Don't let the crypto algo see a misaligned length. */
+ sp->len = round_down(sp->len, 8);
+
/* Decrypt the skbuff in-place. TODO: We really want to decrypt
* directly into the target buffer.
*/
@@ -543,8 +546,10 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb,
if (sg != _sg)
kfree(sg);
if (ret < 0) {
- WARN_ON_ONCE(ret != -ENOMEM);
- return ret;
+ if (ret == -ENOMEM)
+ return ret;
+ return rxrpc_abort_eproto(call, skb, RXKADSEALEDINCON,
+ rxkad_abort_2_crypto_unaligned);
}
/* Extract the decrypted packet length */
@@ -1136,7 +1141,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
struct rxrpc_crypt session_key;
struct key *server_key;
time64_t expiry;
- void *ticket;
+ void *ticket = NULL;
u32 version, kvno, ticket_len, level;
__be32 csum;
int ret, i;
@@ -1162,13 +1167,13 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
ret = -ENOMEM;
response = kzalloc_obj(struct rxkad_response, GFP_NOFS);
if (!response)
- goto temporary_error;
+ goto error;
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
response, sizeof(*response)) < 0) {
- rxrpc_abort_conn(conn, skb, RXKADPACKETSHORT, -EPROTO,
- rxkad_abort_resp_short);
- goto protocol_error;
+ ret = rxrpc_abort_conn(conn, skb, RXKADPACKETSHORT, -EPROTO,
+ rxkad_abort_resp_short);
+ goto error;
}
version = ntohl(response->version);
@@ -1178,62 +1183,62 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
trace_rxrpc_rx_response(conn, sp->hdr.serial, version, kvno, ticket_len);
if (version != RXKAD_VERSION) {
- rxrpc_abort_conn(conn, skb, RXKADINCONSISTENCY, -EPROTO,
- rxkad_abort_resp_version);
- goto protocol_error;
+ ret = rxrpc_abort_conn(conn, skb, RXKADINCONSISTENCY, -EPROTO,
+ rxkad_abort_resp_version);
+ goto error;
}
if (ticket_len < 4 || ticket_len > MAXKRB5TICKETLEN) {
- rxrpc_abort_conn(conn, skb, RXKADTICKETLEN, -EPROTO,
- rxkad_abort_resp_tkt_len);
- goto protocol_error;
+ ret = rxrpc_abort_conn(conn, skb, RXKADTICKETLEN, -EPROTO,
+ rxkad_abort_resp_tkt_len);
+ goto error;
}
if (kvno >= RXKAD_TKT_TYPE_KERBEROS_V5) {
- rxrpc_abort_conn(conn, skb, RXKADUNKNOWNKEY, -EPROTO,
- rxkad_abort_resp_unknown_tkt);
- goto protocol_error;
+ ret = rxrpc_abort_conn(conn, skb, RXKADUNKNOWNKEY, -EPROTO,
+ rxkad_abort_resp_unknown_tkt);
+ goto error;
}
/* extract the kerberos ticket and decrypt and decode it */
ret = -ENOMEM;
ticket = kmalloc(ticket_len, GFP_NOFS);
if (!ticket)
- goto temporary_error_free_resp;
+ goto error;
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header) + sizeof(*response),
ticket, ticket_len) < 0) {
- rxrpc_abort_conn(conn, skb, RXKADPACKETSHORT, -EPROTO,
- rxkad_abort_resp_short_tkt);
- goto protocol_error;
+ ret = rxrpc_abort_conn(conn, skb, RXKADPACKETSHORT, -EPROTO,
+ rxkad_abort_resp_short_tkt);
+ goto error;
}
ret = rxkad_decrypt_ticket(conn, server_key, skb, ticket, ticket_len,
&session_key, &expiry);
if (ret < 0)
- goto temporary_error_free_ticket;
+ goto error;
/* use the session key from inside the ticket to decrypt the
* response */
ret = rxkad_decrypt_response(conn, response, &session_key);
if (ret < 0)
- goto temporary_error_free_ticket;
+ goto error;
if (ntohl(response->encrypted.epoch) != conn->proto.epoch ||
ntohl(response->encrypted.cid) != conn->proto.cid ||
ntohl(response->encrypted.securityIndex) != conn->security_ix) {
- rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
- rxkad_abort_resp_bad_param);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
+ rxkad_abort_resp_bad_param);
+ goto error;
}
csum = response->encrypted.checksum;
response->encrypted.checksum = 0;
rxkad_calc_response_checksum(response);
if (response->encrypted.checksum != csum) {
- rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
- rxkad_abort_resp_bad_checksum);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
+ rxkad_abort_resp_bad_checksum);
+ goto error;
}
for (i = 0; i < RXRPC_MAXCALLS; i++) {
@@ -1241,38 +1246,38 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
u32 counter = READ_ONCE(conn->channels[i].call_counter);
if (call_id > INT_MAX) {
- rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
- rxkad_abort_resp_bad_callid);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
+ rxkad_abort_resp_bad_callid);
+ goto error;
}
if (call_id < counter) {
- rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
- rxkad_abort_resp_call_ctr);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
+ rxkad_abort_resp_call_ctr);
+ goto error;
}
if (call_id > counter) {
if (conn->channels[i].call) {
- rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
+ ret = rxrpc_abort_conn(conn, skb, RXKADSEALEDINCON, -EPROTO,
rxkad_abort_resp_call_state);
- goto protocol_error_free;
+ goto error;
}
conn->channels[i].call_counter = call_id;
}
}
if (ntohl(response->encrypted.inc_nonce) != conn->rxkad.nonce + 1) {
- rxrpc_abort_conn(conn, skb, RXKADOUTOFSEQUENCE, -EPROTO,
- rxkad_abort_resp_ooseq);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADOUTOFSEQUENCE, -EPROTO,
+ rxkad_abort_resp_ooseq);
+ goto error;
}
level = ntohl(response->encrypted.level);
if (level > RXRPC_SECURITY_ENCRYPT) {
- rxrpc_abort_conn(conn, skb, RXKADLEVELFAIL, -EPROTO,
- rxkad_abort_resp_level);
- goto protocol_error_free;
+ ret = rxrpc_abort_conn(conn, skb, RXKADLEVELFAIL, -EPROTO,
+ rxkad_abort_resp_level);
+ goto error;
}
conn->security_level = level;
@@ -1280,31 +1285,12 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
* this the connection security can be handled in exactly the same way
* as for a client connection */
ret = rxrpc_get_server_data_key(conn, &session_key, expiry, kvno);
- if (ret < 0)
- goto temporary_error_free_ticket;
-
- kfree(ticket);
- kfree(response);
- _leave(" = 0");
- return 0;
-
-protocol_error_free:
- kfree(ticket);
-protocol_error:
- kfree(response);
- key_put(server_key);
- return -EPROTO;
-temporary_error_free_ticket:
+error:
kfree(ticket);
-temporary_error_free_resp:
kfree(response);
-temporary_error:
- /* Ignore the response packet if we got a temporary error such as
- * ENOMEM. We just want to send the challenge again. Note that we
- * also come out this way if the ticket decryption fails.
- */
key_put(server_key);
+ _leave(" = %d", ret);
return ret;
}
diff --git a/net/rxrpc/skbuff.c b/net/rxrpc/skbuff.c
index 3bcd6ee80396..e2169d1a14b5 100644
--- a/net/rxrpc/skbuff.c
+++ b/net/rxrpc/skbuff.c
@@ -47,15 +47,6 @@ void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace why)
}
/*
- * Note the dropping of a ref on a socket buffer by the core.
- */
-void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace why)
-{
- int n = atomic_inc_return(&rxrpc_n_rx_skbs);
- trace_rxrpc_skb(skb, 0, n, why);
-}
-
-/*
* Note the destruction of a socket buffer.
*/
void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace why)
generated by cgit v1.2.3 (git 2.39.0) at 2026-05-13 13:04:53 +0300