From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Wed, 29 Apr 2020 14:59:21 -0600
Subject: wireguard: queueing: cleanup ptr_ring in error path of
 packet_queue_init
Patch-mainline: v5.7-rc5
Git-commit: 130c58606171326c81841a49cc913cd354113dd9
References: bsc#1169021 jsc#SLE-12250

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 <sultan@kerneltoast.com>
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 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);
 		}