Jun Nie 0dc0fa313b ext4: refuse to create ea block when umounted
commit f31173c19901a96bb2ebf6bcfec8a08df7095c91 upstream.

The ea block expansion need to access s_root while it is
already set as NULL when umount is triggered. Refuse this
request to avoid panic.

Reported-by: syzbot+2dacb8f015bf1420155f@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=3613786cb88c93aa1c6a279b1df6a7b201347d08
Link: https://lore.kernel.org/r/20230103014517.495275-3-jun.nie@linaro.org
Cc: stable@kernel.org
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-11 16:40:01 +01:00
..
2020-10-16 11:11:22 -07:00
2021-09-18 13:40:15 +02:00
2023-03-11 16:39:38 +01:00
2023-02-22 12:55:54 +01:00
2022-06-09 10:21:16 +02:00
2023-01-04 11:39:23 +01:00
2023-01-14 10:16:27 +01:00