linux-kernel - [PATCH 1/1] RDMA/cma: Fix rdma_resolve

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Date:   Thu, 24 Jun 2021 11:55:31 -0700
From:   Gerd Rausch <gerd.rausch@...cle.com>
To:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Subject: [PATCH 1/1] RDMA/cma: Fix rdma_resolve_route memory leak

Fix a memory leak when "rmda_resolve_route" is called
more than once on the same "rdma_cm_id".

Signed-off-by: Gerd Rausch <gerd.rausch@...cle.com>
---
 drivers/infiniband/core/cma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index ab148a696c0c..4a76d5b4163e 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2819,7 +2819,8 @@ static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
 
 	cma_init_resolve_route_work(work, id_priv);
 
-	route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
+	if (!route->path_rec)
+		route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
 	if (!route->path_rec) {
 		ret = -ENOMEM;
 		goto err1;
-- 
2.24.1