linux-kernel - Re: [PATCH] drm/amdgpu: Fix memory leak in amdgpu_cs

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Date:   Thu, 10 Nov 2022 14:53:09 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Luben Tuikov <luben.tuikov@....com>
Cc:     Dong Chenchen <dongchenchen2@...wei.com>, airlied@...il.com,
        daniel@...ll.ch, Xinhui.Pan@....com, yuehaibing@...wei.com,
        linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, alexander.deucher@....com,
        christian.koenig@....com
Subject: Re: [PATCH] drm/amdgpu: Fix memory leak in amdgpu_cs_pass1

On Thu, Nov 10, 2022 at 1:08 PM Luben Tuikov <luben.tuikov@....com> wrote:
>
> Thanks for fixing this.
>
> Please add a Cc tag to stable, and repost.

No need for stable.  This patch just went upstream in 6.1, so I can
include it in my 6.1 fixes pull next week.  Applied.

Thanks!

Alex

>
> Reviewed-by: Luben Tuikov <luben.tuikov@....com>
>
> Regards,
> Luben
>
> On 2022-11-10 09:33, Dong Chenchen wrote:
> > When p->gang_size equals 0, amdgpu_cs_pass1() will return directly
> > without freeing chunk_array, which will cause a memory leak issue,
> > this patch fixes it.
> >
> > Fixes: 4624459c84d7 ("drm/amdgpu: add gang submit frontend v6")
> > Signed-off-by: Dong Chenchen <dongchenchen2@...wei.com>
> > ---
> >  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> > index 1bbd39b3b0fc..0e24d6b80e0b 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> > @@ -287,8 +287,10 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
> >               }
> >       }
> >
> > -     if (!p->gang_size)
> > -             return -EINVAL;
> > +     if (!p->gang_size) {
> > +             ret = -EINVAL;
> > +             goto free_partial_kdata;
> > +     }
> >
> >       for (i = 0; i < p->gang_size; ++i) {
> >               ret = amdgpu_job_alloc(p->adev, num_ibs[i], &p->jobs[i], vm);
>