From: Daniel Vetter <daniel@ffwll.ch>
To: Jordan Crouse <jcrouse@codeaurora.org>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm: Make sure that encoder_type for drm_encoder_init() is in the list
Date: Mon, 2 Jul 2018 10:11:41 +0200 [thread overview]
Message-ID: <20180702081141.GH13978@phenom.ffwll.local> (raw)
In-Reply-To: <20180629214743.1503-1-jcrouse@codeaurora.org>
On Fri, Jun 29, 2018 at 03:47:43PM -0600, Jordan Crouse wrote:
> If a encoder name isn't specified for drm_encoder_init() it will try
> to construct one based on the incoming encoder_type identifier. If the
> caller passes an invalid encoder_type value the lookup could walk right
> past the end of the table.
>
> [v2: Use a WARN() at the top of the function as suggested by Daniel
> Vetter]
>
> Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Aside: Want drm-misc commit rights so you can push patches like these
yourself?
Might also be useful in case the group maintainership thing with msm
happens, just as prep.
-Daniel
> ---
> drivers/gpu/drm/drm_encoder.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> index 273e1c59c54a..6228c2cee5f0 100644
> --- a/drivers/gpu/drm/drm_encoder.c
> +++ b/drivers/gpu/drm/drm_encoder.c
> @@ -114,6 +114,10 @@ int drm_encoder_init(struct drm_device *dev,
> if (WARN_ON(dev->mode_config.num_encoder >= 32))
> return -EINVAL;
>
> + /* Make sure that the requested encoder type is in the list */
> + if (WARN_ON(encoder_type >= ARRAY_SIZE(drm_encoder_enum_list)))
> + return -EINVAL;
> +
> ret = drm_mode_object_add(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
> if (ret)
> return ret;
> --
> 2.17.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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next prev parent reply other threads:[~2018-07-02 8:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-29 21:47 [PATCH] drm: Make sure that encoder_type for drm_encoder_init() is in the list Jordan Crouse
2018-07-02 8:11 ` Daniel Vetter [this message]
-- strict thread matches above, loose matches on Subject: below --
2018-06-21 23:04 Jordan Crouse
2018-06-22 8:31 ` Daniel Vetter
2018-06-22 14:56 ` Jordan Crouse
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