[PATCH -next] drm/amd/display: Fix possible memleak in dp_trigger_hotplug()

[Alex Deucher]

Applied.  Thanks,

Alex

On Thu, Sep 10, 2020 at 11:34 AM Harry Wentland <harry.wentland at amd.com> wrote:
>
> On 2020-09-09 11:26 p.m., YueHaibing wrote:
> > If parse_write_buffer_into_params() fails, we should free
> > wr_buf before return.
> >
> > Fixes: 6f77b2ac6280 ("drm/amd/display: Add connector HPD trigger debugfs entry")
> > Signed-off-by: YueHaibing <yuehaibing at huawei.com>
>
> Reviewed-by: Harry Wentland <harry.wentland at amd.com>
>
> Harry
>
> > ---
> >   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 4 +++-
> >   1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> > index 83da24aced45..11e16fbe484d 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
> > @@ -1089,8 +1089,10 @@ static ssize_t dp_trigger_hotplug(struct file *f, const char __user *buf,
> >       if (parse_write_buffer_into_params(wr_buf, wr_buf_size,
> >                                               (long *)param, buf,
> >                                               max_param_num,
> > -                                             &param_nums))
> > +                                             &param_nums)) {
> > +             kfree(wr_buf);
> >               return -EINVAL;
> > +     }
> >
> >       if (param_nums <= 0) {
> >               DRM_DEBUG_DRIVER("user data not be read\n");
> >
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