[dpdk-dev] [PATCH v7 26/27] net/i40e: fix segmentation fault in close

[Iremonger, Bernard]

Hi Jingjing,

> -----Original Message-----
> From: Wu, Jingjing
> Sent: Friday, January 6, 2017 1:29 AM
> To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; dev at dpdk.org
> Cc: Iremonger, Bernard <bernard.iremonger at intel.com>; stable at dpdk.org
> Subject: RE: [dpdk-dev] [PATCH v7 26/27] net/i40e: fix segmentation fault in
> close
> 
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Wenzhuo Lu
> > Sent: Tuesday, January 3, 2017 2:55 PM
> > To: dev at dpdk.org
> > Cc: Iremonger, Bernard <bernard.iremonger at intel.com>;
> stable at dpdk.org
> > Subject: [dpdk-dev] [PATCH v7 26/27] net/i40e: fix segmentation fault
> > in close
> >
> > From: Bernard Iremonger <bernard.iremonger at intel.com>
> >
> > The vsi's have already been released, so the second call to
> > i40e_vsi_release results in a segmentation fault.
> > The second call to i40e_vsi_release has been removed.
> Where is the first call to release vmdq vsi?

All of the VSI's are released in the call to i40e_vsi_release(pf->main_vsi) at line 1895.
This function is recursive and release all the VSI's.

There is still a VSI address in pf->vmdq[i].vsi  but calling 
i40e_vsi_release(pf->vmdq[i].vsi);
Results in a segmentation fault.

> 
> Thanks
> Jingjing
> >
> > Fixes: 3cb446b4aeb2 ("i40e: free vmdq vsi when closing")
> >
> > CC: stable at dpdk.org
> >
> > Signed-off-by: Bernard Iremonger <bernard.iremonger at intel.com>
> > ---
> >  drivers/net/i40e/i40e_ethdev.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/i40e/i40e_ethdev.c
> > b/drivers/net/i40e/i40e_ethdev.c index be45cfa..0b7c366 100644
> > --- a/drivers/net/i40e/i40e_ethdev.c
> > +++ b/drivers/net/i40e/i40e_ethdev.c
> > @@ -1882,7 +1882,6 @@ static inline void i40e_GLQF_reg_init(struct
> > i40e_hw
> > *hw)
> >  	i40e_vsi_release(pf->main_vsi);
> >
> >  	for (i = 0; i < pf->nb_cfg_vmdq_vsi; i++) {
> > -		i40e_vsi_release(pf->vmdq[i].vsi);
> >  		pf->vmdq[i].vsi = NULL;
> >  	}
> >
> > @@ -4137,6 +4136,9 @@ enum i40e_status_code
> >  	if (!vsi)
> >  		return I40E_SUCCESS;
> >
> > +	if (!vsi->adapter)
> > +		return I40E_ERR_BAD_PTR;
> > +
> >  	user_param = vsi->user_param;
> >
> >  	pf = I40E_VSI_TO_PF(vsi);
> > --
> > 1.9.3
Regards,

Bernard.