From 9bd41f5634118567ae19a6c87029579985e12dc6 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Mon, 17 Jun 2019 17:12:49 +0100 Subject: [PATCH] net: lio_core: fix potential sign-extension overflow on large shift [ Upstream commit 9476274093a0e79b905f4cd6cf6d149f65e02c17 ] Left shifting the signed int value 1 by 31 bits has undefined behaviour and the shift amount oq_no can be as much as 63. Fix this by using BIT_ULL(oq_no) instead. Addresses-Coverity: ("Bad shift operation") Fixes: f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters") Signed-off-by: Colin Ian King Reviewed-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/cavium/liquidio/lio_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c index 23f6b60030c5..8c16298a252d 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_core.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c @@ -854,7 +854,7 @@ static void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct) if (droq->ops.poll_mode) { droq->ops.napi_fn(droq); - oct_priv->napi_mask |= (1 << oq_no); + oct_priv->napi_mask |= BIT_ULL(oq_no); } else { tasklet_schedule(&oct_priv->droq_tasklet); } -- 2.20.1