linux-kernel - Re: [PATCH] scsi: scsi_dh_alua: Fix possible null-ptr-deref

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Date:   Wed, 29 May 2019 22:04:57 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <bvanassche@....org>, <axboe@...nel.dk>, <hare@...e.de>,
        <linux-kernel@...r.kernel.org>, <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] scsi: scsi_dh_alua: Fix possible null-ptr-deref


YueHaibing,

> If alloc_workqueue fails in alua_init, it should return -ENOMEM,
> otherwise it will trigger null-ptr-deref while unloading module which
> calls destroy_workqueue dereference wq->lock like this:

Applied to 5.2/scsi-fixes. Thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering