linux-kernel - Re: [PATCH linux-next v2 1/3] platform/x86/intel/tpmi: Fix double free in tpmi_create

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Message-ID: <41c9e613d718095e31674f625f48c60fe493d658.camel@linux.intel.com>
Date:   Fri, 17 Mar 2023 03:27:47 -0700
From:   srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Dongliang Mu <dzm91@...t.edu.cn>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH linux-next v2 1/3] platform/x86/intel/tpmi: Fix double
 free in tpmi_create_device()

Hi Dongliang,

> 
...
...


> Hi Srinivas and Hans,
> 
> How about folding these three patches into one patch and resend a v3
> patch?
> 
> This will get all people together and avoid the previous embarrassing
> sitation.

This is NOT an embarrassing situation.
Thanks for finding and fixing the issue.

Thanks,
Srinivas


> 
> Dongliang Mu
> 
> > 
> > > Regards,
> > > 
> > > Hans
> > > 
> > > 
> > > 
> > > 
> > > > ---
> > > >   drivers/platform/x86/intel/tpmi.c | 17 ++++-------------
> > > >   1 file changed, 4 insertions(+), 13 deletions(-)
> > > > 
> > > > diff --git a/drivers/platform/x86/intel/tpmi.c
> > > > b/drivers/platform/x86/intel/tpmi.c
> > > > index c999732b0f1e..882fe5e4763f 100644
> > > > --- a/drivers/platform/x86/intel/tpmi.c
> > > > +++ b/drivers/platform/x86/intel/tpmi.c
> > > > @@ -215,8 +215,8 @@ static int tpmi_create_device(struct
> > > > intel_tpmi_info *tpmi_info,
> > > >   
> > > >          feature_vsec_dev = kzalloc(sizeof(*feature_vsec_dev),
> > > > GFP_KERNEL);
> > > >          if (!feature_vsec_dev) {
> > > > -               ret = -ENOMEM;
> > > > -               goto free_res;
> > > > +               kfree(res);
> > > > +               return -ENOMEM;
> > > >          }
> > > >   
> > > >          snprintf(feature_id_name, sizeof(feature_id_name),
> > > > "tpmi-
> > > > %s", name);
> > > > @@ -242,17 +242,8 @@ static int tpmi_create_device(struct
> > > > intel_tpmi_info *tpmi_info,
> > > >           * feature_vsec_dev memory is also freed as part of
> > > > device
> > > >           * delete.
> > > >           */
> > > > -       ret = intel_vsec_add_aux(vsec_dev->pcidev, &vsec_dev-
> > > > > auxdev.dev,
> > > > -                                feature_vsec_dev,
> > > > feature_id_name);
> > > > -       if (ret)
> > > > -               goto free_res;
> > > > -
> > > > -       return 0;
> > > > -
> > > > -free_res:
> > > > -       kfree(res);
> > > > -
> > > > -       return ret;
> > > > +       return intel_vsec_add_aux(vsec_dev->pcidev, &vsec_dev-
> > > > > auxdev.dev,
> > > > +                                 feature_vsec_dev,
> > > > feature_id_name);
> > > >   }
> > > >   
> > > >   static int tpmi_create_devices(struct intel_tpmi_info
> > > > *tpmi_info)