From:   Ondrej Zary <linux@zary.sk>
To:     Sergey Shtylyov <s.shtylyov@omp.ru>
Subject: Re: [PATCH] pata_parport: fix possible memory leak
Date:   Sat, 11 Mar 2023 22:11:57 +0100
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Cc:     Sergei Shtylyov <sergei.shtylyov@gmail.com>,
        Damien Le Moal <damien.lemoal@opensource.wdc.com>,
        Dan Carpenter <error27@gmail.com>,
        Christoph Hellwig <hch@lst.de>, linux-ide@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <3ab89ddc-cb60-47c4-86ad-cdad94a8a3d7@kili.mountain> <e02f5626-81be-d949-d2b4-7f70820b409c@gmail.com> <2223c1dc-1869-a307-e5da-772cb27b34e5@omp.ru>
In-Reply-To: <2223c1dc-1869-a307-e5da-772cb27b34e5@omp.ru>
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On Saturday 11 March 2023 21:23:25 Sergey Shtylyov wrote:
> On 3/11/23 11:19 PM, Sergei Shtylyov wrote:
> 
> >> When ida_alloc() fails, "pi" is not freed although the misleading
> >> comment says otherwise.
> >> Move the ida_alloc() call up so we really don't have to free it.
> 
>    Wait, but don't we still need to call kfree() in pi_init_one()?

If it fails at device_register, the dev.release is already set to pata_parport_dev_release which does the kfree(). put_device() should call it. If it fails later, device_unregister() should do it.
 
> >> Reported-by: kernel test robot <lkp@intel.com>
> >> Reported-by: Dan Carpenter <error27@gmail.com>
> >> Link: https://lore.kernel.org/r/202303111822.IHNchbkp-lkp@intel.com/
> >> Signed-off-by: Ondrej Zary <linux@zary.sk>
> > 
> > Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
> > 
> > [...]
> 
> MBR, Sergey
> 


-- 
Ondrej Zary