[PATCH rdma-next 5/6] RDMA/mana_ib: boundary check before installing cq callbacks

Konstantin Taranov
2024-04-18T16:52:12Z

From: Konstantin Taranov <kotaranov@microsoft.com>

Add a boundary check inside mana_ib_install_cq_cb to prevent index overflow.

Fixes: 2a31c5a7e0d8 ("RDMA/mana_ib: Introduce mana_ib_install_cq_cb helper function")
Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
---
drivers/infiniband/hw/mana/cq.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/mana/cq.c b/drivers/infiniband/hw/mana/cq.c
index 6c3bb8c..8323085 100644
--- a/drivers/infiniband/hw/mana/cq.c
+++ b/drivers/infiniband/hw/mana/cq.c
@@ -70,6 +70,8 @@ int mana_ib_install_cq_cb(struct mana_ib_dev *mdev, struct mana_ib_cq *cq)
struct gdma_context *gc = mdev_to_gc(mdev);
struct gdma_queue *gdma_cq;

+ if (cq->queue.id >= gc->max_num_cqs)
+ return -EINVAL;
/* Create CQ table entry */
WARN_ON(gc->cq_table[cq->queue.id]);
gdma_cq = kzalloc(sizeof(*gdma_cq), GFP_KERNEL);
--
2.43.0