netdev - [PATCH net 2/3] wireguard: queueing: cleanup ptr_ring in error path of packet_queue

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Message-Id: <20200429205922.295361-3-Jason@zx2c4.com>
Date:   Wed, 29 Apr 2020 14:59:21 -0600
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>,
        Sultan Alsawaf <sultan@...neltoast.com>
Subject: [PATCH net 2/3] wireguard: queueing: cleanup ptr_ring in error path of packet_queue_init

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@...neltoast.com>
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
---
 drivers/net/wireguard/queueing.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireguard/queueing.c b/drivers/net/wireguard/queueing.c
index 5c964fcb994e..71b8e80b58e1 100644
--- a/drivers/net/wireguard/queueing.c
+++ b/drivers/net/wireguard/queueing.c
@@ -35,8 +35,10 @@ int wg_packet_queue_init(struct crypt_queue *queue, work_func_t function,
 		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);
 		}
-- 
2.26.2