linux-kernel - [PATCH 5.4 135/255] RDMA/rxe: Fix the error caused by qp->sk

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Message-Id: <20221024113007.067610368@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:30:45 +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, Zhu Yanjun <yanjun.zhu@...ux.dev>,
        Li Zhijian <lizhijian@...itsu.com>,
        Bob Pearson <rpearsonhpe@...il.com>,
        Leon Romanovsky <leon@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 135/255] RDMA/rxe: Fix the error caused by qp->sk

From: Zhu Yanjun <yanjun.zhu@...ux.dev>

[ Upstream commit 548ce2e66725dcba4e27d1e8ac468d5dd17fd509 ]

When sock_create_kern in the function rxe_qp_init_req fails,
qp->sk is set to NULL.

Then the function rxe_create_qp will call rxe_qp_do_cleanup
to handle allocated resource.

Before handling qp->sk, this variable should be checked.

Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20220822011615.805603-3-yanjun.zhu@linux.dev
Signed-off-by: Zhu Yanjun <yanjun.zhu@...ux.dev>
Reviewed-by: Li Zhijian <lizhijian@...itsu.com>
Reviewed-by: Bob Pearson <rpearsonhpe@...il.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/sw/rxe/rxe_qp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index be3eff792864..89f6d54a4312 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -847,8 +847,10 @@ static void rxe_qp_do_cleanup(struct work_struct *work)
 
 	free_rd_atomic_resources(qp);
 
-	kernel_sock_shutdown(qp->sk, SHUT_RDWR);
-	sock_release(qp->sk);
+	if (qp->sk) {
+		kernel_sock_shutdown(qp->sk, SHUT_RDWR);
+		sock_release(qp->sk);
+	}
 }
 
 /* called when the last reference to the qp is dropped */
-- 
2.35.1