linux-kernel - [PATCH] RDMA/hfi1: fix potential memory leak in setup_base

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Date:   Mon, 11 Jul 2022 15:07:18 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     dennis.dalessandro@...nelisnetworks.com, jgg@...pe.ca,
        leon@...nel.org
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] RDMA/hfi1: fix potential memory leak in setup_base_ctxt()

setup_base_ctxt() allocates a memory chunk for uctxt->groups with
hfi1_alloc_ctxt_rcv_groups(). When init_user_ctxt() fails, uctxt->groups
is not released, which will lead to a memory leak.

We should release the uctxt->groups with hfi1_free_ctxt_rcv_groups()
when init_user_ctxt() fails.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
---
 drivers/infiniband/hw/hfi1/file_ops.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c
index 2e4cf2b11653..629beff053ad 100644
--- a/drivers/infiniband/hw/hfi1/file_ops.c
+++ b/drivers/infiniband/hw/hfi1/file_ops.c
@@ -1179,8 +1179,10 @@ static int setup_base_ctxt(struct hfi1_filedata *fd,
 		goto done;
 
 	ret = init_user_ctxt(fd, uctxt);
-	if (ret)
+	if (ret) {
+		hfi1_free_ctxt_rcv_groups(uctxt);
 		goto done;
+	}
 
 	user_init(uctxt);
 
-- 
2.25.1