tipc: fix shift wrapping bug in map_get()

[ Upstream commit e2b224abd9bf45dcb55750479fc35970725a430b ]

There is a shift wrapping bug in this code so anything thing above
31 will return false.

Fixes: 35c55c9877f8 ("tipc: add neighbor monitoring framework")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/tipc/monitor.c b/net/tipc/monitor.c
index e1f4538b16532ef8249d53a8ca004458ac0b5700..7efcbd11a907a39043fe49990b369149b76a4310 100644 (file)
--- a/net/tipc/monitor.c
+++ b/net/tipc/monitor.c
@@ -130,7 +130,7 @@ static void map_set(u64 *up_map, int i, unsigned int v)
 
 static int map_get(u64 up_map, int i)
 {
-       return (up_map & (1 << i)) >> i;
+       return (up_map & (1ULL << i)) >> i;
 }
 
 static struct tipc_peer *peer_prev(struct tipc_peer *peer)