Subject: Re: [PATCH iwl-next v2 11/13] ice: enable FDIR filters from raw binary patterns for VFs

From: Simon Horman <[email-masked]>
Date: Fri, 31 May 2024 19:11:59 +0100

On Fri, May 31, 2024 at 09:47:47AM -0600, Ahmed Zaki wrote:
> 
> 
> On 2024-05-31 7:18 a.m., Simon Horman wrote:
> > On Mon, May 27, 2024 at 12:58:08PM -0600, Ahmed Zaki wrote:
> > > From: Junfeng Guo <[email-masked]>
> > > 
> > > Enable VFs to create FDIR filters from raw binary patterns.
> > > The corresponding processes for raw flow are added in the
> > > Parse / Create / Destroy stages.
> > > 
> > > Reviewed-by: Marcin Szycik <[email-masked]>
> > > Signed-off-by: Junfeng Guo <[email-masked]>
> > > Co-developed-by: Ahmed Zaki <[email-masked]>
> > > Signed-off-by: Ahmed Zaki <[email-masked]>
> > 
> > ...
> > 
> > > diff --git a/drivers/net/ethernet/intel/ice/ice_flow.c b/drivers/net/ethernet/intel/ice/ice_flow.c
> > 
> > ...
> > 
> > > +/**
> > > + * ice_flow_set_parser_prof - Set flow profile based on the parsed profile info
> > > + * @hw: pointer to the HW struct
> > > + * @dest_vsi: dest VSI
> > > + * @fdir_vsi: fdir programming VSI
> > > + * @prof: stores parsed profile info from raw flow
> > > + * @blk: classification blk
> > > + */
> > > +int
> > > +ice_flow_set_parser_prof(struct ice_hw *hw, u16 dest_vsi, u16 fdir_vsi,
> > > +			 struct ice_parser_profile *prof, enum ice_block blk)
> > > +{
> > > +	u64 id = find_first_bit(prof->ptypes, ICE_FLOW_PTYPE_MAX);
> > > +	struct ice_flow_prof_params *params __free(kfree);
> > > +	u8 fv_words = hw->blk[blk].es.fvw;
> > > +	int status;
> > > +	int i, idx;
> > > +
> > > +	params = kzalloc(sizeof(*params), GFP_KERNEL);
> > > +	if (!params)
> > > +		return -ENOMEM;
> > 
> > 
> > params seems to be leaked when this function returns below,
> > in both error and non-error cases.
> 
> Shouldn't the __free guard take care of this?

Yes, sorry for missing that.

...

> > > diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.c b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
> > > index 5635e9da2212..9138f7783da0 100644
> > > --- a/drivers/net/ethernet/intel/ice/ice_vf_lib.c
> > > +++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.c
> > > @@ -1,8 +1,8 @@
> > >   // SPDX-License-Identifier: GPL-2.0
> > >   /* Copyright (C) 2022, Intel Corporation. */
> > > -#include "ice_vf_lib_private.h"
> > >   #include "ice.h"
> > > +#include "ice_vf_lib_private.h"
> > >   #include "ice_lib.h"
> > >   #include "ice_fltr.h"
> > >   #include "ice_virtchnl_allowlist.h"
> > 
> > To me tweaking the order of includes seems to indicate
> > that something isn't quite right. Is there some sort of
> > dependency loop being juggled here?
> 
> This was needed because of the changes in ice_flow.h, struct ice_vsi is now
> used. I will check if there is a better fix.

Thanks.

...

> > > +static int
> > > +ice_vc_fdir_parse_raw(struct ice_vf *vf,
> > > +		      struct virtchnl_proto_hdrs *proto,
> > > +		      struct virtchnl_fdir_fltr_conf *conf)
> > > +{
> > > +	u8 *pkt_buf, *msk_buf __free(kfree);
> > > +	struct ice_parser_result rslt;
> > > +	struct ice_pf *pf = vf->pf;
> > > +	struct ice_parser *psr;
> > > +	int status = -ENOMEM;
> > > +	struct ice_hw *hw;
> > > +	u16 udp_port = 0;
> > > +
> > > +	pkt_buf = kzalloc(proto->raw.pkt_len, GFP_KERNEL);
> > > +	msk_buf = kzalloc(proto->raw.pkt_len, GFP_KERNEL);
> > 
> > msk_buf appears to be leaked both in when this function
> > returns for both error and non-error cases.
> 
> Same, guarded by __free. I am new to these guards myself, pls let me know if
> I am missing something.

No, sorry. Somehow I missed the __free.
I think we are good here.