diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-07-03 03:11:48 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-07-06 22:01:23 -0700 |
| commit | 186a9647019587b3784694894c4d136fd00cfd7b (patch) | |
| tree | 47864da1726666d59bfa20a9b346b06d4b948218 | |
| parent | 561bf15892375597ee59d473a704a3e634c4f311 (diff) | |
iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser
This patch adds target_get_sess_cmd reference counting for
iscsit_handle_task_mgt_cmd(), and adds a target_put_sess_cmd()
for the failure case.
It also fixes a bug where ISCSI_OP_SCSI_TMFUNC type commands
where leaking iscsi_cmd->i_conn_node and eventually triggering
an OOPs during struct isert_conn shutdown.
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/infiniband/ulp/isert/ib_isert.c | 16 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 12 |
2 files changed, 18 insertions, 10 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 7e219a46e7c..9efbf13007e 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -1200,14 +1200,12 @@ isert_put_cmd(struct isert_cmd *isert_cmd) { struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd; struct isert_conn *isert_conn = isert_cmd->conn; - struct iscsi_conn *conn; + struct iscsi_conn *conn = isert_conn->conn; pr_debug("Entering isert_put_cmd: %p\n", isert_cmd); switch (cmd->iscsi_opcode) { case ISCSI_OP_SCSI_CMD: - conn = isert_conn->conn; - spin_lock_bh(&conn->cmd_lock); if (!list_empty(&cmd->i_conn_node)) list_del(&cmd->i_conn_node); @@ -1217,16 +1215,18 @@ isert_put_cmd(struct isert_cmd *isert_cmd) iscsit_stop_dataout_timer(cmd); isert_unmap_cmd(isert_cmd, isert_conn); - /* - * Fall-through - */ + transport_generic_free_cmd(&cmd->se_cmd, 0); + break; case ISCSI_OP_SCSI_TMFUNC: + spin_lock_bh(&conn->cmd_lock); + if (!list_empty(&cmd->i_conn_node)) + list_del(&cmd->i_conn_node); + spin_unlock_bh(&conn->cmd_lock); + transport_generic_free_cmd(&cmd->se_cmd, 0); break; case ISCSI_OP_REJECT: case ISCSI_OP_NOOP_OUT: - conn = isert_conn->conn; - spin_lock_bh(&conn->cmd_lock); if (!list_empty(&cmd->i_conn_node)) list_del(&cmd->i_conn_node); diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 4319dad7d91..c30ec1d5756 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1737,8 +1737,8 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct se_tmr_req *se_tmr; struct iscsi_tmr_req *tmr_req; struct iscsi_tm *hdr; - int out_of_order_cmdsn = 0; - int ret; + int out_of_order_cmdsn = 0, ret; + bool sess_ref = false; u8 function; hdr = (struct iscsi_tm *) buf; @@ -1794,6 +1794,9 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, conn->sess->se_sess, 0, DMA_NONE, MSG_SIMPLE_TAG, cmd->sense_buffer + 2); + target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); + sess_ref = true; + switch (function) { case ISCSI_TM_FUNC_ABORT_TASK: tcm_function = TMR_ABORT_TASK; @@ -1931,6 +1934,11 @@ attach: * For connection recovery, this is also the default action for * TMR TASK_REASSIGN. */ + if (sess_ref) { + pr_debug("Handle TMR, using sess_ref=true check\n"); + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); + } + iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); return 0; } |