From: Felix Gu <ustc.gu@gmail.com> stable inclusion from stable-v6.6.130 commit 0bd326dffd9e103335d77d9c31275c0d5a7979eb category: bugfix bugzilla: http://atomgit.com/src-openeuler/kernel/issues/14066 CVE: CVE-2026-23426 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit fef0e649f8b42bdffe4a916dd46e1b1e9ad2f207 ] The logicvc_drm_config_parse() function calls of_get_child_by_name() to find the "layers" node but fails to release the reference, leading to a device node reference leak. Fix this by using the __free(device_node) cleanup attribute to automatic release the reference when the variable goes out of scope. Fixes: efeeaefe9be5 ("drm: Add support for the LogiCVC display controller") Signed-off-by: Felix Gu <ustc.gu@gmail.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Kory Maincent <kory.maincent@bootlin.com> Link: https://patch.msgid.link/20260130-logicvc_drm-v1-1-04366463750c@gmail.com Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Jiacheng Yu <yujiacheng3@huawei.com> --- drivers/gpu/drm/logicvc/logicvc_drm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/logicvc/logicvc_drm.c b/drivers/gpu/drm/logicvc/logicvc_drm.c index 749debd3d6a57..df74572e6d2ea 100644 --- a/drivers/gpu/drm/logicvc/logicvc_drm.c +++ b/drivers/gpu/drm/logicvc/logicvc_drm.c @@ -90,7 +90,6 @@ static int logicvc_drm_config_parse(struct logicvc_drm *logicvc) struct device *dev = drm_dev->dev; struct device_node *of_node = dev->of_node; struct logicvc_drm_config *config = &logicvc->config; - struct device_node *layers_node; int ret; logicvc_of_property_parse_bool(of_node, LOGICVC_OF_PROPERTY_DITHERING, @@ -126,7 +125,8 @@ static int logicvc_drm_config_parse(struct logicvc_drm *logicvc) if (ret) return ret; - layers_node = of_get_child_by_name(of_node, "layers"); + struct device_node *layers_node __free(device_node) = + of_get_child_by_name(of_node, "layers"); if (!layers_node) { drm_err(drm_dev, "Missing non-optional layers node\n"); return -EINVAL; -- 2.43.0