RDMA/mana_ib: Fix integer overflow during queue creation

Check queue size during CQ creation for users to prevent
overflow of u32.

Fixes: bec127e ("RDMA/mana_ib: create kernel-level CQs")
Signed-off-by: Konstantin Taranov <[email protected]>
Link: https://patch.msgid.link/[email protected]
Reviewed-by: Long Li <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Konstantin Taranov

drivers/infiniband/hw/mana/cq.c

@@ -39,7 +39,8 @@ int mana_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 
 		is_rnic_cq = !!(ucmd.flags & MANA_IB_CREATE_RNIC_CQ);
 
-		if (!is_rnic_cq && attr->cqe > mdev->adapter_caps.max_qp_wr) {
+		if ((!is_rnic_cq && attr->cqe > mdev->adapter_caps.max_qp_wr) ||
+		    attr->cqe > U32_MAX / COMP_ENTRY_SIZE) {
 			ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);
 			return -EINVAL;
 		}