linux-kernel - [PATCH AUTOSEL 5.0 36/66] block: use blk_free_flush_queue() to free hctx->fq in blk_mq_init

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Date:   Wed, 24 Apr 2019 10:33:10 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Shenghui Wang <shhuiw@...mail.com>, Jens Axboe <axboe@...nel.dk>,
        Sasha Levin <sashal@...nel.org>, linux-block@...r.kernel.org
Subject: [PATCH AUTOSEL 5.0 36/66] block: use blk_free_flush_queue() to free hctx->fq in blk_mq_init_hctx

From: Shenghui Wang <shhuiw@...mail.com>

[ Upstream commit b9a1ff504b9492ad6beb7d5606e0e3365d4d8499 ]

kfree() can leak the hctx->fq->flush_rq field.

Reviewed-by: Ming Lei <ming.lei@...hat.com>
Signed-off-by: Shenghui Wang <shhuiw@...mail.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin (Microsoft) <sashal@...nel.org>
---
 block/blk-mq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 16f9675c57e6..97eba6d23425 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2341,7 +2341,7 @@ static int blk_mq_init_hctx(struct request_queue *q,
 	return 0;
 
  free_fq:
-	kfree(hctx->fq);
+	blk_free_flush_queue(hctx->fq);
  exit_hctx:
 	if (set->ops->exit_hctx)
 		set->ops->exit_hctx(hctx, hctx_idx);
-- 
2.19.1