[PATCH 5.19 116/192] tipc: fix shift wrapping bug in map_get()

Greg Kroah-Hartman
2022-09-13T14:22:26Z

From: Dan Carpenter <dan.carpenter@oracle.com>

[ 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>
---
net/tipc/monitor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tipc/monitor.c b/net/tipc/monitor.c
index 2f4d23238a7e3..9618e4429f0fe 100644
--- a/net/tipc/monitor.c
+++ b/net/tipc/monitor.c
@@ -160,7 +160,7 @@ 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)
--
2.35.1