mainline inclusion
from mainline-8c380ab4b7b5 undefined
commit 8c380ab4b7b5
category: bugfix
bugzilla: 14884
CVE: NA

-------------------------------------------------

The reference to iloc.bh has been dropped in ext4_mark_iloc_dirty.
However, the reference is dropped again if error occurs during
ext4_handle_dirty_metadata, which may result in use-after-free bugs.

Fixes: fb265c9cb49e("ext4: add ext4_sb_bread() to disambiguate ENOMEM cases")
Signed-off-by: NPan Bian <bianpan2016@163.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Reviewed-by: NJan Kara <jack@suse.cz>
Cc: stable@kernel.org
Signed-off-by: Nzhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Nyangerkun <yangerkun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>