linux-kernel - [PATCH 3.10 160/268] rdma_cm: fail iwarp accepts w/o connection params

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Message-Id: <1497897167-14556-161-git-send-email-w@1wt.eu>
Date:   Mon, 19 Jun 2017 20:30:59 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Steve Wise <swise@...ngridcomputing.com>,
        Doug Ledford <dledford@...hat.com>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 160/268] rdma_cm: fail iwarp accepts w/o connection params

From: Steve Wise <swise@...ngridcomputing.com>

commit f2625f7db4dd0bbd16a9c7d2950e7621f9aa57ad upstream.

cma_accept_iw() needs to return an error if conn_params is NULL.
Since this is coming from user space, we can crash.

Reported-by: Shaobo He <shaobo@...utah.edu>
Acked-by: Sean Hefty <sean.hefty@...el.com>
Signed-off-by: Steve Wise <swise@...ngridcomputing.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/infiniband/core/cma.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 71c2c711..818cac9 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2772,6 +2772,9 @@ static int cma_accept_iw(struct rdma_id_private *id_priv,
 	struct iw_cm_conn_param iw_param;
 	int ret;
 
+	if (!conn_param)
+		return -EINVAL;
+
 	ret = cma_modify_qp_rtr(id_priv, conn_param);
 	if (ret)
 		return ret;
-- 
2.8.0.rc2.1.gbe9624a