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drm: Reject getfb for multi-plane framebuffers

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getfb can only return a single plane, so reject attempts to use it with
multi-plane framebuffers.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reported-by: Daniel van Vugt <daniel.van.vugt@canonical.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Fixes: 308e5bcbdb10 ("drm: add an fb creation ioctl that takes a pixel format v5")
Cc: stable@vger.kernel.org # v3.3+
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105518
Link: https://patchwork.freedesktop.org/patch/msgid/20180320225839.30905-1-daniels@collabora.com
This commit is contained in:
Daniel Stone 2018-03-20 22:58:39 +00:00
parent 1bc659eb23
commit b24791fe00
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/drm_framebuffer.c
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@ -461,6 +461,12 @@ int drm_mode_getfb(struct drm_device *dev,
if (!fb)
return -ENOENT;
/* Multi-planar framebuffers need getfb2. */
if (fb->format->num_planes > 1) {
ret = -EINVAL;
goto out;
}
r->height = fb->height;
r->width = fb->width;
r->depth = fb->format->depth;
@ -484,6 +490,7 @@ int drm_mode_getfb(struct drm_device *dev,
ret = -ENODEV;
}
out:
drm_framebuffer_put(fb);
return ret;