From: Dan Carpenter Date: Mon, 06 Apr 2020 14:43:35 +0000 Subject: [PATCH] RDMA/cm: Fix an error check in cm_alloc_id_priv() Message-Id: <20200406144335.GD68494@mwanda> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Doug Ledford , Jason Gunthorpe Cc: Leon Romanovsky , Danit Goldberg , Parav Pandit , linux-rdma@vger.kernel.org, kernel-janitors@vger.kernel.org The xa_alloc_cyclic_irq() function returns either 0 or 1 on success and negatives on error. This code treats 1 as an error and returns ERR_PTR(1) which will cause an Oops in the caller. Fixes: e8dc4e885c45 ("RDMA/cm: Fix ordering of xa_alloc_cyclic() in ib_create_cm_id()") Signed-off-by: Dan Carpenter --- The Fixes tag may not be correct. That's the patch which introduces an Oops but we may want to backport this further back. drivers/infiniband/core/cm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 4794113ecd59..f7ac5974176f 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -862,7 +862,7 @@ static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device, ret = xa_alloc_cyclic_irq(&cm.local_id_table, &id, NULL, xa_limit_32b, &cm.local_id_next, GFP_KERNEL); - if (ret) + if (ret < 0) goto error; cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; -- 2.25.1