linux-kernel - [PATCH 3.16 047/294] RDMA/ocrdma: Fix error codes in ocrdma_create

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Message-ID: <lsq.1510009382.573683603@decadent.org.uk>
Date:   Mon, 06 Nov 2017 23:03:02 +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>,
        "Dan Carpenter" <dan.carpenter@...cle.com>
Subject: [PATCH 3.16 047/294] RDMA/ocrdma: Fix error codes in
 ocrdma_create_srq()

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

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

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

commit f0c6e88288d65c93bbc7da4fb6f7d51b2733228a upstream.

If either of these allocations fail then we return ERR_PTR(0).  That's
equivalent to NULL and results in a NULL pointer dereference in the
caller.

Fixes: fe2caefcdf58 ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE RDMA adapter")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -1720,6 +1720,7 @@ struct ib_srq *ocrdma_create_srq(struct
 		goto err;
 
 	if (udata == NULL) {
+		status = -ENOMEM;
 		srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
 			    GFP_KERNEL);
 		if (srq->rqe_wr_id_tbl == NULL)