[SRU][P:linux-azure][PATCH 5/6] RDMA/mana_ib: Fix integer overflow during queue creation

[John Cabaj]

From: Konstantin Taranov <kotaranov at microsoft.com>

BugLink: https://bugs.launchpad.net/bugs/2128662

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

Fixes: bec127e45d9f ("RDMA/mana_ib: create kernel-level CQs")
Signed-off-by: Konstantin Taranov <kotaranov at microsoft.com>
Link: https://patch.msgid.link/1742312744-14370-1-git-send-email-kotaranov@linux.microsoft.com
Reviewed-by: Long Li <longli at microsoft.com>
Signed-off-by: Leon Romanovsky <leon at kernel.org>
(cherry picked from commit 0c55174524227a174c1a367889cd704212d15b45)
Signed-off-by: John Cabaj <john.cabaj at canonical.com>
---
 drivers/infiniband/hw/mana/cq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mana/cq.c b/drivers/infiniband/hw/mana/cq.c
index c8a66432dc95..1becc8779123 100644
--- a/drivers/infiniband/hw/mana/cq.c
+++ b/drivers/infiniband/hw/mana/cq.c
@@ -37,7 +37,8 @@ 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;
 		}
-- 
2.43.0