[PATCH 5.6 052/118] wireguard: queueing: cleanup ptr_ring in error path of packet_queue_init

[Greg Kroah-Hartman]

From: "Jason A. Donenfeld" <ja...@zx2c4.com>

[ Upstream commit 130c58606171326c81841a49cc913cd354113dd9 ]

Prior, if the alloc_percpu of packet_percpu_multicore_worker_alloc
failed, the previously allocated ptr_ring wouldn't be freed. This commit
adds the missing call to ptr_ring_cleanup in the error case.

Reported-by: Sultan Alsawaf <sul...@kerneltoast.com>
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/wireguard/queueing.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/wireguard/queueing.c
+++ b/drivers/net/wireguard/queueing.c
@@ -35,8 +35,10 @@ int wg_packet_queue_init(struct crypt_qu
                if (multicore) {
                        queue->worker = wg_packet_percpu_multicore_worker_alloc(
                                function, queue);
-                       if (!queue->worker)
+                       if (!queue->worker) {
+                               ptr_ring_cleanup(&queue->ring, NULL);
                                return -ENOMEM;
+                       }
                } else {
                        INIT_WORK(&queue->work, function);
                }