[PATCH net 3/3] rxrpc: Fix variable overwrite

[David Howells]

From: Gustavo A. R. Silva <garsi...@embeddedor.com>

Values assigned to both variable resend_at and ack_at are overwritten
before they can be used.

The correct fix here is to add 'now' to the previously computed value in
resend_at and ack_at.

Addresses-Coverity-ID: 1462262
Addresses-Coverity-ID: 1462263
Addresses-Coverity-ID: 1462264
Fixes: beb8e5e4f38c ("rxrpc: Express protocol timeouts in terms of RTT")
Link: https://marc.info/?i=17004.1511808959%40warthog.procyon.org.uk
Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
Signed-off-by: David Howells <dhowe...@redhat.com>
---

 net/rxrpc/call_event.c |    2 +-
 net/rxrpc/sendmsg.c    |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 555274ddc514..ad2ab1103189 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -123,7 +123,7 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 
ack_reason,
                else
                        ack_at = expiry;
 
-               ack_at = jiffies + expiry;
+               ack_at += now;
                if (time_before(ack_at, call->ack_at)) {
                        WRITE_ONCE(call->ack_at, ack_at);
                        rxrpc_reduce_call_timer(call, ack_at, now,
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index a1c53ac066a1..09f2a3e05221 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -233,7 +233,7 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, 
struct rxrpc_call *call,
                if (resend_at < 1)
                        resend_at = 1;
 
-               resend_at = now + rxrpc_resend_timeout;
+               resend_at += now;
                WRITE_ONCE(call->resend_at, resend_at);
                rxrpc_reduce_call_timer(call, resend_at, now,
                                        rxrpc_timer_set_for_send);