Re: Re: [PATCH] [v2] ethernet: atheros: fix a memleak in atl1e_setup_ring_resources

[alexious@zju.edu.cn]

> On Fri,  8 Dec 2023 16:23:14 +0800 Zhipeng Lu wrote:
> > v2: Setting tx_ring->tx_buffer to NULL after free.
> 
> Having closer look at this driver  - it tries to free both on close and
> remove, so seems like we do indeed have to NULL-out the pointer, sigh.
> 
> > diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
> > index 5935be190b9e..1bffe77439ac 100644
> > --- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
> > +++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
> > @@ -866,6 +866,8 @@ static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
> >  		netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
> >  			   offset, adapter->ring_size);
> >  		err = -1;
> > +		kfree(tx_ring->tx_buffer);
> > +		tx_ring->tx_buffer = NULL;
> >  		goto failed;
> 
> Please add a new jump target, tho, and move the freeing there.
> There's a small chance someone will add more code to this function
> and it will need to copy / paste this unwind.
> -- 

Thank you for your advice, I've send a v3 version of this patch.