diff mbox series

[v4,06/12] nvmet-fc: hold reference on hostport match

Message ID 20240130094938.1575-7-dwagner@suse.de
State New
Headers
Series enable nvmet-fc for blktests |

Commit Message

Daniel Wagner Jan. 30, 2024, 9:49 a.m. UTC 
  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.

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

Comments

Christoph Hellwig Jan. 31, 2024, 6:27 a.m. UTC | #1 
On Tue, Jan 30, 2024 at 10:49:32AM +0100, Daniel Wagner wrote:
> 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.
> 
> Reviewed-by: Hannes Reinecke <hare@suse.de>
> Signed-off-by: Daniel Wagner <dwagner@suse.de>

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index b44b99525c44..205a12b1e841 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1068,8 +1068,6 @@  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;