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From: "ira.weiny" <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Alexey Khoroshilov <khoroshilov-ufN2psIa012HXe+LvDLADg@public.gmane.org>
Cc: Mike Marciniszyn
	<infinipath-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Hal Rosenstock
	<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Greg Kroah-Hartman
	<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
	linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	ldv-project-tpLiQldItUH5n4uC9ZG1Ww@public.gmane.org
Subject: Re: [BUG] IB/hfi1: might sleep under spinlock in hfi1_ioctl()
Date: Fri, 30 Oct 2015 19:58:18 -0400	[thread overview]
Message-ID: <20151030235817.GA13800@phlsvsds.ph.intel.com> (raw)
In-Reply-To: <1446240749-5003-1-git-send-email-khoroshilov-ufN2psIa012HXe+LvDLADg@public.gmane.org>

On Sat, Oct 31, 2015 at 12:32:29AM +0300, Alexey Khoroshilov wrote:
> Hello,
> 
> hfi1_ioctl() contains many calls to might sleep functions with
> dd->hfi1_snoop.snoop_lock spinlock held (for example, access_ok,
> copy_from_user, kzalloc(GFP_KERNEL), etc.).
> 
> Should dd->hfi1_snoop.snoop_lock be acquired just before updating state?

I believe you are correct.

I am currently in the process of pushing fixes to the staging tree.

We have a patch which fixes this queued up but it depends on at least one other
patch in my queue.

I will do my best to get this submitted soon.

Thanks,
Ira

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  parent reply	other threads:[~2015-10-30 23:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-30 21:32 [BUG] IB/hfi1: might sleep under spinlock in hfi1_ioctl() Alexey Khoroshilov
     [not found] ` <1446240749-5003-1-git-send-email-khoroshilov-ufN2psIa012HXe+LvDLADg@public.gmane.org>
2015-10-30 23:58   ` ira.weiny [this message]
     [not found]     ` <20151030235817.GA13800-W4f6Xiosr+yv7QzWx2u06xL4W9x8LtSr@public.gmane.org>
2015-11-11  5:53       ` ira.weiny

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