tipc: Fix recognition of trial period

[ Upstream commit 28be7ca4fcfd69a2d52aaa331adbf9dbe91f9e6e ]

The trial period exists until jiffies is after addr_trial_end. But as
jiffies will eventually overflow, just using time_after will eventually
give incorrect results. As the node address is set once the trial period
ends, this can be used to know that we are not in the trial period.

Fixes: e415577f57f4 ("tipc: correct discovery message handling during address trial period")
Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index da69e1a..e863070 100644 (file)
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -148,8 +148,8 @@ static bool tipc_disc_addr_trial_msg(struct tipc_discoverer *d,
 {
        struct net *net = d->net;
        struct tipc_net *tn = tipc_net(net);
-       bool trial = time_before(jiffies, tn->addr_trial_end);
        u32 self = tipc_own_addr(net);
+       bool trial = time_before(jiffies, tn->addr_trial_end) && !self;
 
        if (mtyp == DSC_TRIAL_FAIL_MSG) {
                if (!trial)