linux-kernel - Re: [PATCH v2] xen: fix memory leak in __xen_pcibk_add_pci

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Date:	Tue, 01 Apr 2014 11:48:26 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Daeseok Youn" <daeseok.youn@...il.com>, <konrad.wilk@...cle.com>
Cc:	<david.vrabel@...rix.com>, <xen-devel@...ts.xenproject.org>,
	<boris.ostrovsky@...cle.com>, <joe@...ches.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] xen: fix memory leak in
 __xen_pcibk_add_pci_dev()

>>> On 01.04.14 at 12:15, <daeseok.youn@...il.com> wrote:

> It need to free dev_entry when it failed to assign to a new
> slot on the virtual PCI bus.
> 
> smatch says:
>  drivers/xen/xen-pciback/vpci.c:142 __xen_pcibk_add_pci_dev() warn:
> possible memory leak of 'dev_entry'
> 
> Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>

As before
Reviewed-by: Jan Beulich <jbeulich@...e.com>

> ---
> v2: The kfree() invocation is moved outside the locked region.
> 
>  drivers/xen/xen-pciback/vpci.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/xen/xen-pciback/vpci.c b/drivers/xen/xen-pciback/vpci.c
> index 3165ce3..51afff9 100644
> --- a/drivers/xen/xen-pciback/vpci.c
> +++ b/drivers/xen/xen-pciback/vpci.c
> @@ -137,6 +137,8 @@ unlock:
>  	/* Publish this device. */
>  	if (!err)
>  		err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, func), devid);
> +	else
> +		kfree(dev_entry);
>  
>  out:
>  	return err;
> -- 
> 1.7.4.4



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