Re: [PATCH] net/mlx5: fix memleak for resource object

[Mahmoud Maatouq <mahmoudmatook.mm@gmail.com>]

On 06/24, Dariusz Sosnowski wrote:

> Hi,
>
> Thank you very much for the fix.
>
> Could you please provide the commit message explaining the problem reported by Coverity and the fix?

I thought of doing that, but found Coverity report already explained it,
so i was afraid it could be redundant, but I'll add it as a quick
explanation

>
> > -----Original Message-----
> > From: Mahmoud Maatuq <mahmoudmatook.mm@gmail.com>
> > Sent: Sunday, June 23, 2024 12:36
> > To: Dariusz Sosnowski <dsosnowski@nvidia.com>; Slava Ovsiienko
> > <viacheslavo@nvidia.com>; Bing Zhao <bingz@nvidia.com>; Ori Kam
> > <orika@nvidia.com>; Suanming Mou <suanmingm@nvidia.com>; Matan Azrad
> > <matan@nvidia.com>
> > Cc: dev@dpdk.org; Mahmoud Maatuq <mahmoudmatook.mm@gmail.com>
> > Subject: [PATCH] net/mlx5: fix memleak for resource object
> >
> > Coverity issue: 426424
> > Fixes: e78e5408da89 ("net/mlx5: remove cache term from the list utility")
>
> The issue was introduced in commit 27d171b88031 ("net/mlx5: abstract flow action and enable reconfigure").
> Fixes tag should reference that commit.

how to get the proper commit that introduced the issue, as I used git
blame to get the above mentioned commit


>
> > Cc: matan@nvidia.com
> >
> > Signed-off-by: Mahmoud Maatuq <mahmoudmatook.mm@gmail.com>
> > ---
> >  drivers/net/mlx5/mlx5_flow_dv.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
> > index d46beffd4c..1010b8e423 100644
> > --- a/drivers/net/mlx5/mlx5_flow_dv.c
> > +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> > @@ -12010,9 +12010,12 @@ flow_matcher_create_cb(void *tool_ctx, void
> > *cb_ctx)
> >                 items = *((const struct rte_flow_item **)(ctx->data2));
> >                 resource->matcher_object = mlx5dr_bwc_matcher_create
> >                                 (resource->group->tbl, resource->priority, items);
> > -               if (!(resource->matcher_object))
> > +               if (!(resource->matcher_object)) {
>
> While we're at it, could you please remove the parentheses around resource->matcher_object? They're redundant.
>
> > +                       mlx5_free(resource);
> >                         return NULL;
> > +               }
> >  #else
> > +               mlx5_free(resource);
> >                 return NULL;
> >  #endif
> >         }
> > --
> > 2.43.0
>
> Best regards,
> Dariusz Sosnowski
>