linux-kernel - RE: [PATCH 11/29] drivers, media: convert cx88_core.refcount from atomic_t to refcount

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2236FBA76BA1254E88B949DDB74E612B41C556E2@IRSMSX102.ger.corp.intel.com>
Date:   Tue, 7 Mar 2017 07:52:09 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux1394-devel@...ts.sourceforge.net" 
        <linux1394-devel@...ts.sourceforge.net>,
        "linux-bcache@...r.kernel.org" <linux-bcache@...r.kernel.org>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "fcoe-devel@...n-fcoe.org" <fcoe-devel@...n-fcoe.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "open-iscsi@...glegroups.com" <open-iscsi@...glegroups.com>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        Hans Liljestrand <ishkamiel@...il.com>,
        Kees Cook <keescook@...omium.org>,
        David Windsor <dwindsor@...il.com>
Subject: RE: [PATCH 11/29] drivers, media: convert cx88_core.refcount from
 atomic_t to refcount_t

> Hello.
> 
> On 03/06/2017 05:20 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.
> >
> > Signed-off-by: Elena Reshetova <elena.reshetova@...el.com>
> > Signed-off-by: Hans Liljestrand <ishkamiel@...il.com>
> > Signed-off-by: Kees Cook <keescook@...omium.org>
> > Signed-off-by: David Windsor <dwindsor@...il.com>
> [...]
> > diff --git a/drivers/media/pci/cx88/cx88.h b/drivers/media/pci/cx88/cx88.h
> > index 115414c..16c1313 100644
> > --- a/drivers/media/pci/cx88/cx88.h
> > +++ b/drivers/media/pci/cx88/cx88.h
> > @@ -24,6 +24,7 @@
> >  #include <linux/i2c-algo-bit.h>
> >  #include <linux/videodev2.h>
> >  #include <linux/kdev_t.h>
> > +#include <linux/refcount.h>
> >
> >  #include <media/v4l2-device.h>
> >  #include <media/v4l2-fh.h>
> > @@ -339,7 +340,7 @@ struct cx8802_dev;
> >
> >  struct cx88_core {
> >  	struct list_head           devlist;
> > -	atomic_t                   refcount;
> > +	refcount_t                   refcount;
> 
>     Could you please keep the name aligned with above and below?

You mean "not aligned" to devlist, but with a shift like it was before? 
Sure, will fix. Is the patch ok otherwise?

Best Regards,
Elena.

> 
> >
> >  	/* board name */
> >  	int                        nr;
> >
> 
> MBR, Sergei