linux-kernel - [PATCH] RDMA/hns: Fix refcount leak in hns_roce

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Date:   Tue, 20 Dec 2022 15:30:47 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Haoyue Xu <xuhaoyue1@...ilicon.com>,
        Wenpeng Liang <liangwenpeng@...wei.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>,
        Yixing Liu <liuyixing1@...wei.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] RDMA/hns: Fix refcount leak in hns_roce_mmap

rdma_user_mmap_entry_get_pgoff() takes reference.
Add missing rdma_user_mmap_entry_put() to release the reference.

Fixes: 0045e0d3f42e ("RDMA/hns: Support direct wqe of userspace")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/infiniband/hw/hns/hns_roce_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index 8ba68ac12388..fbff8df9236d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -443,6 +443,7 @@ static int hns_roce_mmap(struct ib_ucontext *uctx, struct vm_area_struct *vma)
 		prot = pgprot_device(vma->vm_page_prot);
 		break;
 	default:
+		rdma_user_mmap_entry_put(rdma_entry);
 		return -EINVAL;
 	}
 
-- 
2.25.1