linux-kernel - [PATCH 5.14 083/172] RDMA/irdma: Validate number of CQ entries on create CQ

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Date:   Mon,  4 Oct 2021 14:52:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sindhu Devale <sindhu.devale@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 083/172] RDMA/irdma: Validate number of CQ entries on create CQ

From: Sindhu Devale <sindhu.devale@...el.com>

[ Upstream commit f4475f249445b3c1fb99919b0514a075b6d6b3d4 ]

Add lower bound check for CQ entries at creation time.

Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Link: https://lore.kernel.org/r/20210916191222.824-3-shiraz.saleem@intel.com
Signed-off-by: Sindhu Devale <sindhu.devale@...el.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/irdma/verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 6107f37321d2..6c3d28f744cb 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -2040,7 +2040,7 @@ static int irdma_create_cq(struct ib_cq *ibcq,
 		/* Kmode allocations */
 		int rsize;
 
-		if (entries > rf->max_cqe) {
+		if (entries < 1 || entries > rf->max_cqe) {
 			err_code = -EINVAL;
 			goto cq_free_rsrc;
 		}
-- 
2.33.0