From: Jia-Ju Bai <baijiaju1990@gmail.com>
Date: Mon, 29 Jul 2019 16:44:51 +0800
Subject: scsi: qla2xxx: Fix possible fcport null-pointer dereferences
Patch-mainline: v5.3-rc3
Git-commit: e82f04ec6ba91065fd33a6201ffd7cab840e1475
References: bsc#1082635 bsc#1123034 bsc#1131304 bsc#1127988 bsc#1141340 bsc#1143706

In qla2x00_alloc_fcport(), fcport is assigned to NULL in the error
handling code on line 4880:
    fcport = NULL;

Then fcport is used on lines 4883-4886:
    INIT_WORK(&fcport->del_work, qla24xx_delete_sess_fn);
	INIT_WORK(&fcport->reg_work, qla_register_fcport_fn);
	INIT_LIST_HEAD(&fcport->gnl_entry);
	INIT_LIST_HEAD(&fcport->list);

Thus, possible null-pointer dereferences may occur.

To fix these bugs, qla2x00_alloc_fcport() directly returns NULL
in the error handling code.

These bugs are found by a static analysis tool STCheck written by us.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_init.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -4877,7 +4877,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vh
 		ql_log(ql_log_warn, vha, 0xd049,
 		    "Failed to allocate ct_sns request.\n");
 		kfree(fcport);
-		fcport = NULL;
+		return NULL;
 	}
 
 	INIT_WORK(&fcport->del_work, qla24xx_delete_sess_fn);