From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
QLogic-Storage-Upstream@qlogic.com, martin.petersen@oracle.com,
James Bottomley <James.Bottomley@HansenPartnership.com>,
linux-scsi <linux-scsi@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [patch 0/5] scsi/bnx2*: Plug hotplug race, correct locking and simplify hotplug code
Date: Wed, 26 Jul 2017 21:58:38 -0400 [thread overview]
Message-ID: <yq1a83qy71t.fsf@oracle.com> (raw)
In-Reply-To: <20170724105255.715647116@linutronix.de> (Thomas Gleixner's message of "Mon, 24 Jul 2017 12:52:55 +0200")
Thomas,
> The conversion of the cpu hotplug locking to a percpu rwsem does not
> longer allow recursive locking of the hotplug lock.
>
> The BNX2I and BNX2FC drivers install/remove hotplug states with the
> hotplug lock held. The install/removal code acquired the hotplug lock
> as well.
>
> While looking into this, I noticed an interesting hotplug race in the
> BNX2FC driver, which could result in dereferencing a NULL pointer or
> freed and potentially reused memory.
>
> The following series addresses these problems and as a final step on
> top it simplifies the hotplug code in both drivers.
Applied to 4.13/scsi-fixes. Thank you!
--
Martin K. Petersen Oracle Linux Engineering
prev parent reply other threads:[~2017-07-27 1:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-24 10:52 [patch 0/5] scsi/bnx2*: Plug hotplug race, correct locking and simplify hotplug code Thomas Gleixner
2017-07-24 10:52 ` [patch 1/5] scsi/bnx2fc: Plug CPU hotplug race Thomas Gleixner
2017-07-24 10:52 ` [patch 2/5] scsi/bnx2fc: Prevent recursive cpuhotplug locking Thomas Gleixner
2017-07-24 10:52 ` [patch 3/5] scsi/bnx2i: " Thomas Gleixner
2017-07-31 22:09 ` Steven Rostedt
2017-07-24 10:52 ` [patch 4/5] scsi/bnx2fc: Simplify CPU hotplug code Thomas Gleixner
2017-07-24 10:53 ` [patch 5/5] scsi/bnx2i: Simplify cpu " Thomas Gleixner
2017-07-25 13:27 ` [patch 0/5] scsi/bnx2*: Plug hotplug race, correct locking and simplify " Chad Dupuis
2017-07-27 1:58 ` Martin K. Petersen [this message]
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