linux-kernel - Re: [Xen-devel] [PATCH 26/38] xen: xenbus: add missing put

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: <52C56F43.6030804@citrix.com>
Date:	Thu, 2 Jan 2014 13:53:07 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Levente Kurusa <levex@...ux.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Vrabel <david.vrabel@...rix.com>,
	<xen-devel@...ts.xenproject.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [Xen-devel] [PATCH 26/38] xen: xenbus: add missing put_device
 call

On 19/12/13 15:03, Levente Kurusa wrote:
> This is required so that we give up the last reference to the device.
> 
> Signed-off-by: Levente Kurusa <levex@...ux.com>
> ---
>  drivers/xen/xenbus/xenbus_probe.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
> index 3c0a74b..4abb9ee 100644
> --- a/drivers/xen/xenbus/xenbus_probe.c
> +++ b/drivers/xen/xenbus/xenbus_probe.c
> @@ -465,8 +465,10 @@ int xenbus_probe_node(struct xen_bus_type *bus,
>  
>  	/* Register with generic device framework. */
>  	err = device_register(&xendev->dev);
> -	if (err)
> +	if (err) {
> +		put_device(&xendev->dev);
>  		goto fail;
> +	}
>  
>  	return 0;
>  fail:

There is a kfree(xendev) here so this introduces a double-free.

David

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/