This is a note to let you know that I've just added the patch titled
drm: Reject getfb for multi-plane framebuffers
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-reject-getfb-for-multi-plane-framebuffers.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b24791fe00f8b089d5b10cb7bcc4e1ae88b4831b Mon Sep 17 00:00:00 2001
From: Daniel Stone <daniels@xxxxxxxxxxxxx>
Date: Tue, 20 Mar 2018 22:58:39 +0000
Subject: drm: Reject getfb for multi-plane framebuffers
From: Daniel Stone <daniels@xxxxxxxxxxxxx>
commit b24791fe00f8b089d5b10cb7bcc4e1ae88b4831b upstream.
getfb can only return a single plane, so reject attempts to use it with
multi-plane framebuffers.
Signed-off-by: Daniel Stone <daniels@xxxxxxxxxxxxx>
Reported-by: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Reviewed-by: Rob Clark <robdclark@xxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Fixes: 308e5bcbdb10 ("drm: add an fb creation ioctl that takes a pixel format v5")
Cc: stable@xxxxxxxxxxxxxxx # v3.3+
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105518
Link: https://patchwork.freedesktop.org/patch/msgid/20180320225839.30905-1-daniels@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_framebuffer.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -458,6 +458,12 @@ int drm_mode_getfb(struct drm_device *de
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;
@@ -481,6 +487,7 @@ int drm_mode_getfb(struct drm_device *de
ret = -ENODEV;
}
+out:
drm_framebuffer_put(fb);
return ret;
Patches currently in stable-queue which might be from daniels@xxxxxxxxxxxxx are
queue-4.15/drm-reject-getfb-for-multi-plane-framebuffers.patch