netdev - Re: [PATCH v3 3/3] igb: Fix a memory leak in igb

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Message-ID: <CAEUmHyaX5RUMZOE5G6nzXM8O-q0whCEv1ux7ceJY04uU+mw41g@mail.gmail.com>
Date:	Tue, 23 Dec 2014 12:59:31 +0530
From:	Varka Bhadram <varkabhadram@...il.com>
To:	Jia-Ju Bai <baijiaju1990@....com>
Cc:	"davem@...emloft.net" <davem@...emloft.net>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"Allan, Bruce W" <bruce.w.allan@...el.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"<linux.nics@...el.com>" <linux.nics@...el.com>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] igb: Fix a memory leak in igb_probe

On Tue, Dec 23, 2014 at 12:47 PM, Jia-Ju Bai <baijiaju1990@....com> wrote:
> For linux-3.18.0
> The driver calls kcalloc to allocate memory for adapter->shadow_vfta
> in igb_sw_init, but kfree is not called in error handling of igb_probe.
> So when register_netdev or igb_init_i2c is failed, a memory leak occurs.
> This patch fixes this problem, and it has been tested in runtime.
>
> Signed-off-by: Jia-Ju Bai <baijiaju1990@....com>
> ---
>  drivers/net/ethernet/intel/igb/igb_main.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
> index 487cd9c..a0be1e5 100644
> --- a/drivers/net/ethernet/intel/igb/igb_main.c
> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
> @@ -2659,6 +2659,7 @@ err_eeprom:
>         if (hw->flash_address)
>                 iounmap(hw->flash_address);
>  err_sw_init:
> +       kfree(adapter->shadow_vfta);
Why dont you use devm_kcalloc()..? So no need to worry about freeing it.
>         igb_clear_interrupt_scheme(adapter);
>         pci_iounmap(pdev, hw->hw_addr);
>  err_ioremap:
> --
> 1.7.9.5
>
>
> --
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-- 
Thanks and Regards,
Varka Bhadram.
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