From: Qinglang Miao <miaoqinglang@xxxxxxxxxx> [ 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@xxxxxxxxxx Fixes: f3c893e3dbb5 ("scsi: iscsi: Fail session and connection on transport registration failure") Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Reviewed-by: Mike Christie <michael.christie@xxxxxxxxxx> Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/scsi_transport_iscsi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 2eb3e4f9375a5..2e68c0a876986 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -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: -- 2.27.0
