linux-kernel - [PATCH 3.2 012/147] cxgb4: Fix error codes in c4iw_create

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Message-ID: <lsq.1510009387.415981938@decadent.org.uk>
Date:   Mon, 06 Nov 2017 23:03:07 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Doug Ledford" <dledford@...hat.com>,
        "Steve Wise" <swise@...ngridcomputing.com>,
        "Dan Carpenter" <dan.carpenter@...cle.com>
Subject: [PATCH 3.2 012/147] cxgb4: Fix error codes in c4iw_create_cq()

3.2.95-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 6ebedacbb44602d4dec3348dee5ec31dd9b09521 upstream.

If one of these kmalloc() calls fails then we return ERR_PTR(0) which is
NULL.  It results in a NULL dereference in the callers.

Fixes: cfdda9d76436 ("RDMA/cxgb4: Add driver for Chelsio T4 RNIC")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Steve Wise <swise@...ngridcomputing.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/cxgb4/cq.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -826,6 +826,7 @@ struct ib_cq *c4iw_create_cq(struct ib_d
 		goto err2;
 
 	if (ucontext) {
+		ret = -ENOMEM;
 		mm = kmalloc(sizeof *mm, GFP_KERNEL);
 		if (!mm)
 			goto err3;