tipc: potential shift wrapping bug in map_set()

"up_map" is a u64 type but we're not using the high 32 bits.

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>

diff --git a/net/tipc/monitor.c b/net/tipc/monitor.c
index 87d4efedd09fd9768a925ac99d374c8ac6b78584..0d489e81fcca129dbb12f5c00390aad7014ef89e 100644 (file)
--- a/net/tipc/monitor.c
+++ b/net/tipc/monitor.c
@@ -122,8 +122,8 @@ static int dom_size(int peers)
 
 static void map_set(u64 *up_map, int i, unsigned int v)
 {
-       *up_map &= ~(1 << i);
-       *up_map |= (v << i);
+       *up_map &= ~(1ULL << i);
+       *up_map |= ((u64)v << i);
 }
 
 static int map_get(u64 up_map, int i)