Commit 5d0bd593 authored by Ma Ke's avatar Ma Ke Committed by Liu Chuang
Browse files

drm: omapdrm: Add missing check for alloc_ordered_workqueue 

stable inclusion
from stable-v6.6.55
commit b57b53e8ffcdfda87d954fc4187426a54fe75a3d
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYR94
CVE: CVE-2024-49879

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b57b53e8ffcdfda87d954fc4187426a54fe75a3d



--------------------------------

commit e794b7b9b92977365c693760a259f8eef940c536 upstream.

As it may return NULL pointer and cause NULL pointer dereference. Add check
for the return value of alloc_ordered_workqueue.

Cc: stable@vger.kernel.org
Fixes: 2f95bc6d ("drm: omapdrm: Perform initialization/cleanup at probe/remove time")
Signed-off-by: default avatarMa Ke <make24@iscas.ac.cn>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240808061336.2796729-1-make24@iscas.ac.cn


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarLiu Chuang <liuchuang40@huawei.com>
parent d9d4eb85

drivers/gpu/drm/omapdrm/omap_drv.c

+5 −0
Original line number Diff line number Diff line
@@ -695,6 +695,10 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev) 
	soc = soc_device_match(omapdrm_soc_devices);

	priv->omaprev = soc ? (uintptr_t)soc->data : 0;

	priv->wq = alloc_ordered_workqueue("omapdrm", 0);

	if (!priv->wq) {

		ret = -ENOMEM;

		goto err_alloc_workqueue;

	}



	mutex_init(&priv->list_lock);

	INIT_LIST_HEAD(&priv->obj_list);
@@ -753,6 +757,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev) 
	drm_mode_config_cleanup(ddev);

	omap_gem_deinit(ddev);

	destroy_workqueue(priv->wq);

err_alloc_workqueue:

	omap_disconnect_pipelines(ddev);

	drm_dev_put(ddev);

	return ret;