linux-kernel - [PATCH] drm:vkms: Add NULL value after free function In function vkms_exit, after kfree(default_config), give specific NULL value to pointer default

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Date:   Wed, 12 May 2021 19:55:54 +0800
From:   Hao Peng <penghaob@...ontech.com>
To:     rodrigosiqueiramelo@...il.com, melissa.srw@...il.com,
        hamohammed.sa@...il.com, daniel@...ll.ch, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Hao Peng <penghaob@...ontech.com>
Subject: [PATCH] drm:vkms: Add NULL value after free function In function vkms_exit, after kfree(default_config), give specific NULL value to pointer default_config to avoid wild pointer.

Signed-off-by: Hao Peng <penghaob@...ontech.com>
---
 drivers/gpu/drm/vkms/vkms_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 2173b82606f6..6c63201db5d0 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -227,6 +227,7 @@ static void __exit vkms_exit(void)
 		vkms_destroy(default_config);
 
 	kfree(default_config);
+	default_config = NULL;
 }
 
 module_init(vkms_init);
-- 
2.20.1