This is a note to let you know that I've just added the patch titled
drm/komeda: return early if drm_universal_plane_init() fails.
to the 5.17-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-komeda-return-early-if-drm_universal_plane_init-.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 257e45697733c3fdff968a5628c0143538f29c79
Author: Liviu Dudau <liviu.dudau@xxxxxxx>
Date: Thu Dec 2 17:00:33 2021 +0000
drm/komeda: return early if drm_universal_plane_init() fails.
[ Upstream commit c8f76c37cc3668ee45e081e76a15f24a352ebbdd ]
If drm_universal_plane_init() fails early we jump to the common cleanup code
that calls komeda_plane_destroy() which in turn could access the uninitalised
drm_plane and crash. Return early if an error is detected without going through
the common code.
Reported-by: Steven Price <steven.price@xxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Signed-off-by: Liviu Dudau <liviu.dudau@xxxxxxx>
Link: https://lore.kernel.org/dri-devel/20211203100946.2706922-1-liviu.dudau@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index d63d83800a8a..d646e3ae1a23 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -275,8 +275,10 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
komeda_put_fourcc_list(formats);
- if (err)
- goto cleanup;
+ if (err) {
+ kfree(kplane);
+ return err;
+ }
drm_plane_helper_add(plane, &komeda_plane_helper_funcs);
