linux-kernel - [PATCH] drm: check for allocation failure of kstrdup

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Date:   Wed, 15 Jun 2022 15:53:09 +0800
From:   Li Qiong <liqiong@...china.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        yuzhe@...china.com, renyu@...china.com,
        Li Qiong <liqiong@...china.com>
Subject: [PATCH] drm: check for allocation failure of kstrdup_const()

As the possible failure of the kstrdup_const(), it should
be better to check it and handle it.

Signed-off-by: Li Qiong <liqiong@...china.com>
---
 drivers/gpu/drm/drm_managed.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index 4cf214de50c4..d9bd4a9da559 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -151,6 +151,8 @@ int __drmm_add_action(struct drm_device *dev,
 	}
 
 	dr->node.name = kstrdup_const(name, GFP_KERNEL);
+	if (!dr->node.name)
+		return -ENOMEM;
 	if (data) {
 		void_ptr = (void **)&dr->data;
 		*void_ptr = data;
@@ -197,6 +199,8 @@ void *drmm_kmalloc(struct drm_device *dev, size_t size, gfp_t gfp)
 		return NULL;
 	}
 	dr->node.name = kstrdup_const("kmalloc", GFP_KERNEL);
+	if (!dr->node.name)
+		return NULL;
 
 	add_dr(dev, dr);
 
-- 
2.25.1