linux-kernel - Re: [PATCH -next] NTB: Drop kfree for memory allocated with devm

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Message-ID: <20210212174520.GA22934@e121166-lin.cambridge.arm.com>
Date:   Fri, 12 Feb 2021 17:45:20 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Wei Yongjun <weiyongjun1@...wei.com>
Cc:     Hulk Robot <hulkci@...wei.com>, Jon Mason <jdmason@...zu.us>,
        Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-ntb@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] NTB: Drop kfree for memory allocated with
 devm_kzalloc

On Wed, Feb 10, 2021 at 07:53:45AM +0000, Wei Yongjun wrote:
> It's not necessary to free memory allocated with devm_kzalloc
> and using kfree leads to a double free.
> 
> Fixes: 363baf7d6051 ("NTB: Add support for EPF PCI-Express Non-Transparent Bridge")

Squashed it in the commit it is fixing and repushed pci/ntb out.

Thanks,
Lorenzo

> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> ---
>  drivers/ntb/hw/epf/ntb_hw_epf.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/ntb/hw/epf/ntb_hw_epf.c b/drivers/ntb/hw/epf/ntb_hw_epf.c
> index 2cccb7dff5dd..b019755e4e21 100644
> --- a/drivers/ntb/hw/epf/ntb_hw_epf.c
> +++ b/drivers/ntb/hw/epf/ntb_hw_epf.c
> @@ -723,7 +723,6 @@ static void ntb_epf_pci_remove(struct pci_dev *pdev)
>  	ntb_unregister_device(&ndev->ntb);
>  	ntb_epf_cleanup_isr(ndev);
>  	ntb_epf_deinit_pci(ndev);
> -	kfree(ndev);
>  }
>  
>  static const struct ntb_epf_data j721e_data = {
>