linux-kernel - [PATCH 01/21] blk-mq: Fix memory leaks on a queue cleanup

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Message-Id: <0afd4f6e8c2b1b4aa109b87940d9db466b60b53e.1474014910.git.agordeev@redhat.com>
Date:   Fri, 16 Sep 2016 10:51:12 +0200
From:   Alexander Gordeev <agordeev@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Alexander Gordeev <agordeev@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, linux-nvme@...ts.infradead.org
Subject: [PATCH 01/21] blk-mq: Fix memory leaks on a queue cleanup

Some data are leaked when blk_cleanup_queue() interface
is called.

CC: Jens Axboe <axboe@...nel.dk>
CC: linux-nvme@...ts.infradead.org
Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 block/blk-mq.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 13f5a6c..90e3fef 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1707,8 +1707,13 @@ static void blk_mq_free_hw_queues(struct request_queue *q,
 	struct blk_mq_hw_ctx *hctx;
 	unsigned int i;
 
-	queue_for_each_hw_ctx(q, hctx, i)
+	queue_for_each_hw_ctx(q, hctx, i) {
 		free_cpumask_var(hctx->cpumask);
+		kfree(hctx->ctxs);
+		kfree(hctx);
+	}
+
+	q->nr_hw_queues = 0;
 }
 
 static int blk_mq_init_hctx(struct request_queue *q,
-- 
1.8.3.1