linux-kernel - Re: [PATCH] sparc: pci: Fix memory leak in pci_bus_slot

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Message-ID: <Z_ZtTeaHpJeVH-lN@pc>
Date: Wed, 9 Apr 2025 13:51:25 +0100
From: Salah Triki <salah.triki@...il.com>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: "David S. Miller" <davem@...emloft.net>,
	Andreas Larsson <andreas@...sler.com>, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sparc: pci: Fix memory leak in pci_bus_slot_names()

On Mon, Apr 07, 2025 at 09:49:08PM +0200, Christophe JAILLET wrote:
> Le 07/04/2025 à 13:06, Salah Triki a écrit :
> > prop is a local pointer in pci_bus_slot_names(). It is initialized
> > by calling of_get_property() so the caller must free prop when done
> > using it.
> 
> Hi,
> 
> can you elaborate why?
> 
> It does not look needed to me, and the places using of_get_property() that
> I've checked don't have such a kfree().
> 
> CJ

Hi, 

Sorry for disturbing, I was wrong about that.

ST
> 
> > 
> > Signed-off-by: Salah Triki <salah.triki@...il.com>
> > ---
> >   arch/sparc/kernel/pci.c | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
> > index ddac216a2aff..fa0da8f45723 100644
> > --- a/arch/sparc/kernel/pci.c
> > +++ b/arch/sparc/kernel/pci.c
> > @@ -971,6 +971,8 @@ static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
> >   		mask &= ~this_bit;
> >   		i++;
> >   	}
> > +
> > +	kfree(prop);
> >   }
> >   static int __init of_pci_slot_init(void)
>