!2846 [sync] PR-2840: drm/qxl: fix UAF on handle creation

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/2840 
 
PR sync from: Guo Mengqi <guomengqi3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FIS7YPRNETDN2ZKNHSKBMFLUNSHAUV5A/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8EZY4 
 
Link:https://gitee.com/openeuler/kernel/pulls/2846

 

Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>