linux-kernel - [PATCH 1/2] nvme: lightnvm: frees wrong cmd structure

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Message-Id: <1479469094-1337-2-git-send-email-m@bjorling.me>
Date:   Fri, 18 Nov 2016 12:38:13 +0100
From:   Matias Bjørling <m@...rling.me>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     axboe@...com, keith.busch@...el.com,
        Matias Bjørling <m@...rling.me>
Subject: [PATCH 1/2] nvme: lightnvm: frees wrong cmd structure

When struct nvme_request was introduced, the nvme_nvm_submit_io was
converted to the new interface. The interface moves nvme_nvm_command
data structure into the struct request pdu. On io completion, rq->cmd is
freed, which should have been the dereferenced pdu nvme_request->cmd.

Fixes: d49187e97e94 "nvme: introduce struct nvme_request"
Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/nvme/host/lightnvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 442f677..de3dc87 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -477,7 +477,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
 	rqd->ppa_status = nvme_req(rq)->result.u64;
 	nvm_end_io(rqd, error);
 
-	kfree(rq->cmd);
+	kfree(nvme_req(rq)->cmd);
 	blk_mq_free_request(rq);
 }
 
-- 
2.1.4