Re: [PATCH] nfp: flower: Fix a potential theorical leak in nfp_tunnel_add_shared_mac()

[Simon Horman <simon.horman@corigine.com>]

On Thu, Feb 10, 2022 at 07:39:29PM +0100, Christophe JAILLET wrote:
> Le 10/02/2022 à 14:04, Simon Horman a écrit :
> > Hi Christophe,
> > 
> > On Wed, Feb 09, 2022 at 07:58:47PM +0100, Christophe JAILLET wrote:
> > > ida_simple_get() returns an id between min (0) and max (NFP_MAX_MAC_INDEX)
> > > inclusive.
> > > So NFP_MAX_MAC_INDEX (0xff) is a valid id
> > > 
> > > In order for the error handling path to work correctly, the 'invalid'
> > > value for 'ida_idx' should not be in the 0..NFP_MAX_MAC_INDEX range,
> > > inclusive.
> > > 
> > > So set it to -1.
> > > 
> > > While at it, use ida_alloc_xxx()/ida_free() instead to
> > > ida_simple_get()/ida_simple_remove().
> > > The latter is deprecated and more verbose.
> > > 
> > > Fixes: 20cce8865098 ("nfp: flower: enable MAC address sharing for offloadable devs")
> > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> > 
> > Thanks for your patch.
> > 
> > I agree that it is indeed a problem and your fix looks good.
> > I would, however, prefer if the patch was split into two:
> > 
> > 1. Bug fix
> > 2. ida_alloc_xxx()/ida_free() cleanup
> 
> I'll send a v2.
> 
> I added it because some other maintainers have asked for it in other similar
> patches. Everyone's taste is different :).

Thanks, much appreciated.