linux-kernel - Re: [PATCH 21/29] drivers, s390: convert fc_fcp_pkt.ref_cnt from atomic_t to refcount

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Date:   Mon, 6 Mar 2017 17:54:44 +0100
From:   Benjamin Block <bblock@...ux.vnet.ibm.com>
To:     Johannes Thumshirn <jthumshirn@...e.de>
Cc:     Elena Reshetova <elena.reshetova@...el.com>,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, netdev@...r.kernel.org,
        linux1394-devel@...ts.sourceforge.net,
        linux-bcache@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...uxdriverproject.org,
        linux-pci@...r.kernel.org, linux-s390@...r.kernel.org,
        fcoe-devel@...n-fcoe.org, linux-scsi@...r.kernel.org,
        open-iscsi@...glegroups.com, devel@...verdev.osuosl.org,
        target-devel@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-usb@...r.kernel.org, peterz@...radead.org,
        Hans Liljestrand <ishkamiel@...il.com>,
        Kees Cook <keescook@...omium.org>,
        David Windsor <dwindsor@...il.com>
Subject: Re: [PATCH 21/29] drivers, s390: convert fc_fcp_pkt.ref_cnt from
 atomic_t to refcount_t

On Mon, Mar 06, 2017 at 04:27:11PM +0100, Johannes Thumshirn wrote:
> On 03/06/2017 03:21 PM, Elena Reshetova wrote:
> > refcount_t type and corresponding API should be
> > used instead of atomic_t when the variable is used as
> > a reference counter. This allows to avoid accidental
> > refcounter overflows that might lead to use-after-free
> > situations.
> 
> The subject is wrong, should be something like "scsi: libfc convert
> fc_fcp_pkt.ref_cnt from atomic_t to refcount_t" but not s390.
> 

Yes please, I was extremely confused for a moment here.



                                                    Beste Grüße / Best regards,
                                                      - Benjamin Block
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