Lixiaokeng 8c87a83ef8 scsi: libiscsi: Fix UAF in iscsi_conn_get_param()/iscsi_conn_teardown()
[ Upstream commit 1b8d0300a3e9f216ae4901bab886db7299899ec6 ]

|- iscsi_if_destroy_conn            |-dev_attr_show
 |-iscsi_conn_teardown
  |-spin_lock_bh                     |-iscsi_sw_tcp_conn_get_param

  |-kfree(conn->persistent_address)   |-iscsi_conn_get_param
  |-kfree(conn->local_ipaddr)
                                       ==>|-read persistent_address
                                       ==>|-read local_ipaddr
  |-spin_unlock_bh

When iscsi_conn_teardown() and iscsi_conn_get_param() happen in parallel, a
UAF may be triggered.

Link: https://lore.kernel.org/r/046ec8a0-ce95-d3fc-3235-666a7c65b224@huawei.com
Reported-by: Lu Tixiong <lutianxiong@huawei.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Lixiaokeng <lixiaokeng@huawei.com>
Signed-off-by: Linfeilong <linfeilong@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-01-11 15:25:02 +01:00
..
2020-10-14 15:15:35 -07:00
2020-10-23 16:19:02 -07:00
2021-07-20 16:05:41 +02:00
2021-07-20 16:05:41 +02:00
2020-10-16 12:21:15 -07:00
2020-03-11 23:07:59 -04:00
2020-10-14 15:15:35 -07:00
2020-10-23 16:19:02 -07:00
2020-10-23 16:19:02 -07:00
2020-10-23 16:19:02 -07:00
2019-03-02 11:39:54 -08:00
2020-10-23 16:19:02 -07:00
2019-11-12 22:21:35 -05:00
2020-02-24 14:54:25 -05:00
2021-11-18 14:04:15 +01:00
2020-03-11 23:07:59 -04:00
2020-10-07 21:48:28 -04:00
2019-01-08 21:58:35 -05:00
2020-09-02 22:49:06 -04:00
2020-09-02 22:49:06 -04:00
2020-08-23 17:36:59 -05:00
2020-08-06 16:50:07 -07:00
2020-10-13 12:12:44 -07:00
2021-05-14 09:50:27 +02:00
2020-07-24 22:09:55 -04:00
2020-10-14 15:15:35 -07:00
2020-10-23 16:19:02 -07:00
2020-09-15 17:34:18 -04:00
2020-08-23 17:36:59 -05:00
2020-10-14 15:15:35 -07:00
2020-10-14 15:15:35 -07:00
2020-10-14 15:15:35 -07:00
2021-05-14 09:50:27 +02:00
2020-02-24 15:01:57 -05:00
2021-05-14 09:50:27 +02:00
2019-07-11 15:14:01 -07:00