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scsi: iscsi: Fix inappropriate use of put_device()

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[ Upstream commit 6dc1c7ab6f047f45b62986ffebc5324e86ed5f5a ]

kfree(conn) is called inside put_device(&conn->dev) which could lead to
use-after-free. In addition, device_unregister() should be used here rather
than put_deviceO().

Link: https://lore.kernel.org/r/20201120074852.31658-1-miaoqinglang@huawei.com
Fixes: f3c893e3db ("scsi: iscsi: Fail session and connection on transport registration failure")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Qinglang Miao 2020-11-20 15:48:52 +08:00 committed by Greg Kroah-Hartman
parent f6d844be95
commit dcda662622
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/scsi_transport_iscsi.c
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@ -2313,7 +2313,9 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
return conn;
release_conn_ref:
put_device(&conn->dev);
device_unregister(&conn->dev);
put_device(&session->dev);
return NULL;
release_parent_ref:
put_device(&session->dev);
free_conn: