4.18-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit dc71db34e4f3c06b8277c8f3c2ff014610607a8c ]
There's a check in rxrpc_data_ready() that's checking the CLIENT_INITIATED flag in the packet type field rather than in the packet flags field.
Fix this by creating a pair of helper functions to check whether the packet is going to the client or to the server and use them generally.
Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code") Signed-off-by: David Howells dhowells@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/rxrpc/ar-internal.h | 10 ++++++++++ net/rxrpc/conn_object.c | 2 +- net/rxrpc/input.c | 12 ++++-------- 3 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 707630ab4713..5069193d2cc1 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -462,6 +462,16 @@ struct rxrpc_connection { u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ };
+static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) +{ + return sp->hdr.flags & RXRPC_CLIENT_INITIATED; +} + +static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) +{ + return !rxrpc_to_server(sp); +} + /* * Flags in call->flags. */ diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 4c77a78a252a..c37bf8e282b9 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -99,7 +99,7 @@ struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *local, k.epoch = sp->hdr.epoch; k.cid = sp->hdr.cid & RXRPC_CIDMASK;
- if (sp->hdr.flags & RXRPC_CLIENT_INITIATED) { + if (rxrpc_to_server(sp)) { /* We need to look up service connections by the full protocol * parameter set. We look up the peer first as an intermediate * step and then the connection from the peer's tree. diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index 608d078a4981..338fbbf216a9 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -1171,10 +1171,6 @@ void rxrpc_data_ready(struct sock *udp_sk)
trace_rxrpc_rx_packet(sp);
- _net("Rx RxRPC %s ep=%x call=%x:%x", - sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient", - sp->hdr.epoch, sp->hdr.cid, sp->hdr.callNumber); - if (sp->hdr.type >= RXRPC_N_PACKET_TYPES || !((RXRPC_SUPPORTED_PACKET_TYPES >> sp->hdr.type) & 1)) { _proto("Rx Bad Packet Type %u", sp->hdr.type); @@ -1183,13 +1179,13 @@ void rxrpc_data_ready(struct sock *udp_sk)
switch (sp->hdr.type) { case RXRPC_PACKET_TYPE_VERSION: - if (!(sp->hdr.flags & RXRPC_CLIENT_INITIATED)) + if (rxrpc_to_client(sp)) goto discard; rxrpc_post_packet_to_local(local, skb); goto out;
case RXRPC_PACKET_TYPE_BUSY: - if (sp->hdr.flags & RXRPC_CLIENT_INITIATED) + if (rxrpc_to_server(sp)) goto discard; /* Fall through */
@@ -1269,7 +1265,7 @@ void rxrpc_data_ready(struct sock *udp_sk) call = rcu_dereference(chan->call);
if (sp->hdr.callNumber > chan->call_id) { - if (!(sp->hdr.flags & RXRPC_CLIENT_INITIATED)) { + if (rxrpc_to_client(sp)) { rcu_read_unlock(); goto reject_packet; } @@ -1292,7 +1288,7 @@ void rxrpc_data_ready(struct sock *udp_sk) }
if (!call || atomic_read(&call->usage) == 0) { - if (!(sp->hdr.type & RXRPC_CLIENT_INITIATED) || + if (rxrpc_to_client(sp) || sp->hdr.callNumber == 0 || sp->hdr.type != RXRPC_PACKET_TYPE_DATA) goto bad_message_unlock;