linux-kernel - [PATCH v3 10/16] nvmet-fc: hold reference on hostport match

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Date: Mon, 18 Dec 2023 16:30:58 +0100
From: Daniel Wagner <dwagner@...e.de>
To: linux-nvme@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	James Smart <james.smart@...adcom.com>,
	Hannes Reinecke <hare@...e.de>,
	Daniel Wagner <dwagner@...e.de>
Subject: [PATCH v3 10/16] nvmet-fc: hold reference on hostport match

The hostport data structure is shared between the association, this why
we keep track of the users via a refcount. So we should not decrement
the refcount on a match and free the hostport several times.

Reported by KASAN.

Signed-off-by: Daniel Wagner <dwagner@...e.de>
---
 drivers/nvme/target/fc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 0adf65154e27..fa7a6d2edd88 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1070,8 +1070,6 @@ nvmet_fc_alloc_hostport(struct nvmet_fc_tgtport *tgtport, void *hosthandle)
 		/* new allocation not needed */
 		kfree(newhost);
 		newhost = match;
-		/* no new allocation - release reference */
-		nvmet_fc_tgtport_put(tgtport);
 	} else {
 		newhost->tgtport = tgtport;
 		newhost->hosthandle = hosthandle;
-- 
2.43.0