[SCSI] libiscsi: clear conn->ctask when task is completed early

If the current ctask is failed early, we legt the conn->ctask pointer
pointing to a invalid task. When the xmit thread would send data for
it, we would then oops.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index b17081bed128..4461317e617f 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -248,13 +248,16 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
  */
 static void iscsi_complete_command(struct iscsi_cmd_task *ctask)
 {
-        struct iscsi_session *session = ctask->conn->session;
+        struct iscsi_conn *conn = ctask->conn;
+        struct iscsi_session *session = conn->session;
         struct scsi_cmnd *sc = ctask->sc;
 
         ctask->state = ISCSI_TASK_COMPLETED;
         ctask->sc = NULL;
         /* SCSI eh reuses commands to verify us */
         sc->SCp.ptr = NULL;
+        if (conn->ctask == ctask)
+                conn->ctask = NULL;
         list_del_init(&ctask->running);
         __kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
         sc->scsi_done(sc);