target: Check LUN numbers in transport_get_lun_for_[cmd,tmr]

This patch checks the passed 'unpacked_lun' against TRANSPORT_MAX_LUNS_PER_TPG
before reading from struct se_node_acl->device_list[].

Signed-off-by: Fubo Chen <fubo.chen@gmail.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index ba698ea62bb2..f5516a1a32e8 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -65,6 +65,12 @@ int transport_get_lun_for_cmd(
         unsigned long flags;
         int read_only = 0;
 
+        if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
+                se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+                se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+                return -1;
+        }
+
         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
         deve = se_cmd->se_deve =
                         &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
@@ -187,6 +193,12 @@ int transport_get_lun_for_tmr(
         struct se_session *se_sess = SE_SESS(se_cmd);
         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 
+        if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
+                se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+                se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+                return -1;
+        }
+
         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
         deve = se_cmd->se_deve =
                         &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];