Patch "scsi: target: iscsit: Fix TAS handling during conn cleanup" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    scsi: target: iscsit: Fix TAS handling during conn cleanup

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scsi-target-iscsit-fix-tas-handling-during-conn-clea.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 3a0de47913d9269210da866c40e143f084eb0499
Author: Mike Christie <michael.christie@xxxxxxxxxx>
Date:   Sat Mar 18 20:56:19 2023 -0500

    scsi: target: iscsit: Fix TAS handling during conn cleanup
    
    [ Upstream commit cc79da306ebb2edb700c3816b90219223182ac3c ]
    
    Fix a bug added in commit f36199355c64 ("scsi: target: iscsi: Fix cmd abort
    fabric stop race").
    
    If CMD_T_TAS is set on the se_cmd we must call iscsit_free_cmd() to do the
    last put on the cmd and free it, because the connection is down and we will
    not up sending the response and doing the put from the normal I/O
    path.
    
    Add a check for CMD_T_TAS in iscsit_release_commands_from_conn() so we now
    detect this case and run iscsit_free_cmd().
    
    Fixes: f36199355c64 ("scsi: target: iscsi: Fix cmd abort fabric stop race")
    Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230319015620.96006-9-michael.christie@xxxxxxxxxx
    Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 2c54c5d8412d8..9c6b98438f98f 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -4086,9 +4086,12 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn)
 	list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) {
 		struct se_cmd *se_cmd = &cmd->se_cmd;
 
-		if (se_cmd->se_tfo != NULL) {
-			spin_lock_irq(&se_cmd->t_state_lock);
-			if (se_cmd->transport_state & CMD_T_ABORTED) {
+		if (!se_cmd->se_tfo)
+			continue;
+
+		spin_lock_irq(&se_cmd->t_state_lock);
+		if (se_cmd->transport_state & CMD_T_ABORTED) {
+			if (!(se_cmd->transport_state & CMD_T_TAS))
 				/*
 				 * LIO's abort path owns the cleanup for this,
 				 * so put it back on the list and let
@@ -4096,11 +4099,10 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn)
 				 */
 				list_move_tail(&cmd->i_conn_node,
 					       &conn->conn_cmd_list);
-			} else {
-				se_cmd->transport_state |= CMD_T_FABRIC_STOP;
-			}
-			spin_unlock_irq(&se_cmd->t_state_lock);
+		} else {
+			se_cmd->transport_state |= CMD_T_FABRIC_STOP;
 		}
+		spin_unlock_irq(&se_cmd->t_state_lock);
 	}
 	spin_unlock_bh(&conn->cmd_lock);