!3851 ext4: fix slab-out-of-bounds in ext4_find_extent()

Merge Pull Request from: @ci-robot 
 
PR sync from: Baokun Li <libaokun1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ZG2ZE5PT5A2P2FZDKDHLVILCDL4GMEZX/ 
yangerkun (2):
  ext4: avoid recheck extent for EXT4_EX_FORCE_CACHE
  ext4: check magic even the extent block bh is verified


-- 
2.31.1
 
https://gitee.com/openeuler/kernel/issues/I8UB3F 
 
Link:https://gitee.com/openeuler/kernel/pulls/3851

 

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