!4036 ubi: fix slab-out-of-bounds in ubi_eba_get_ldesc+0xfb/0x130

Merge Pull Request from: @ci-robot 
 
PR sync from: ZhaoLong Wang <wangzhaolong1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/4KZYPVT45YTOEQBPTAGXFZQU5BRBUF67/ 
 
https://gitee.com/openeuler/kernel/issues/I8WPL1 
 
Link:https://gitee.com/openeuler/kernel/pulls/4036

 

Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>