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Message-Id: <20211130145022.945517-31-sashal@kernel.org>
Date: Tue, 30 Nov 2021 09:50:08 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Maurizio Lombardi <mlombard@...hat.com>,
Sagi Grimberg <sagi@...mberg.me>,
John Meneghini <jmeneghi@...hat.com>,
Christoph Hellwig <hch@....de>,
Sasha Levin <sashal@...nel.org>, kbusch@...nel.org,
axboe@...com, linux-nvme@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.10 31/43] nvme-tcp: fix memory leak when freeing a queue
From: Maurizio Lombardi <mlombard@...hat.com>
[ Upstream commit a5053c92b3db71c3f7f9f13934ca620632828d06 ]
Release the page frag cache when tearing down the io queues
Signed-off-by: Maurizio Lombardi <mlombard@...hat.com>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Reviewed-by: John Meneghini <jmeneghi@...hat.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/nvme/host/tcp.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index c8efa98192a4f..aaad985175d60 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1212,6 +1212,7 @@ static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl)
static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
{
+ struct page *page;
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl);
struct nvme_tcp_queue *queue = &ctrl->queues[qid];
@@ -1221,6 +1222,11 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
if (queue->hdr_digest || queue->data_digest)
nvme_tcp_free_crypto(queue);
+ if (queue->pf_cache.va) {
+ page = virt_to_head_page(queue->pf_cache.va);
+ __page_frag_cache_drain(page, queue->pf_cache.pagecnt_bias);
+ queue->pf_cache.va = NULL;
+ }
sock_release(queue->sock);
kfree(queue->pdu);
mutex_destroy(&queue->queue_lock);
--
2.33.0
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