linux-kernel - [PATCH] scsi: lpfc: check the return value of alloc

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Date:   Sat, 23 Jul 2022 14:40:27 +0800
From:   williamsukatube@....com
To:     jejb@...ux.ibm.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     james.smart@...adcom.com, dick.kennedy@...adcom.com,
        William Dean <williamsukatube@...il.com>,
        Hacash Robot <hacashRobot@...tino.com>
Subject: [PATCH] scsi: lpfc: check the return value of alloc_workqueue()

From: William Dean <williamsukatube@...il.com>

The function alloc_workqueue() in lpfc_sli4_driver_resource_setup() can
fail, but there is no check of its return value. To fix this bug, its
return value should be checked with new error handling code.

Fixes: 3cee98db2610f ("scsi: lpfc: Fix crash on driver unload in wq free")
Reported-by: Hacash Robot <hacashRobot@...tino.com>
Signed-off-by: William Dean <williamsukatube@...il.com>
---
 drivers/scsi/lpfc/lpfc_init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 750dd1e9f2cc..8e9594f4ed16 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7958,6 +7958,8 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 
 	/* The lpfc_wq workqueue for deferred irq use */
 	phba->wq = alloc_workqueue("lpfc_wq", WQ_MEM_RECLAIM, 0);
+	if (!phba->wq)
+		return -ENOMEM;
 
 	/*
 	 * Initialize timers used by driver
-- 
2.25.1