This is a note to let you know that I've just added the patch titled
drm: zynqmp_kms: Unplug DRM device before removal
to the 6.11-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-zynqmp_kms-unplug-drm-device-before-removal.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9fa1eb3f27b3ee846eb88842c1b1d841c690df42
Author: Sean Anderson <sean.anderson@xxxxxxxxx>
Date: Fri Aug 9 15:35:53 2024 -0400
drm: zynqmp_kms: Unplug DRM device before removal
[ Upstream commit 2e07c88914fc5289c21820b1aa94f058feb38197 ]
Prevent userspace accesses to the DRM device from causing
use-after-frees by unplugging the device before we remove it. This
causes any further userspace accesses to result in an error without
further calls into this driver's internals.
Fixes: d76271d22694 ("drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort Subsystem")
Closes: https://lore.kernel.org/dri-devel/4d8f4c9b-2efb-4774-9a37-2f257f79b2c9@xxxxxxxxx/
Signed-off-by: Sean Anderson <sean.anderson@xxxxxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240809193600.3360015-2-sean.anderson@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
index bd1368df78703..4556af2faa0f1 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_kms.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
@@ -536,7 +536,7 @@ void zynqmp_dpsub_drm_cleanup(struct zynqmp_dpsub *dpsub)
{
struct drm_device *drm = &dpsub->drm->dev;
- drm_dev_unregister(drm);
+ drm_dev_unplug(drm);
drm_atomic_helper_shutdown(drm);
drm_encoder_cleanup(&dpsub->drm->encoder);
drm_kms_helper_poll_fini(drm);
