Chen Zhongjin 1c65d50315 ovl: fix use inode directly in rcu-walk mode ...

commit 672e4268b2863d7e4978dfed29552b31c2f9bd4e upstream.

ovl_dentry_revalidate_common() can be called in rcu-walk mode.  As document
said, "in rcu-walk mode, d_parent and d_inode should not be used without
care".

Check inode here to protect access under rcu-walk mode.

Fixes: bccece1ead36 ("ovl: allow remote upper")
Reported-and-tested-by: syzbot+a4055c78774bbf3498bb@syzkaller.appspotmail.com
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Cc: <stable@vger.kernel.org> # v5.7
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-12-31 13:14:47 +01:00

..

copy_up.c

ovl: fix NULL pointer dereference in copy up warning

2022-02-05 12:38:59 +01:00

dir.c

ovl: use ovl_copy_{real,upper}attr() wrappers

2022-12-31 13:14:00 +01:00

export.c

ovl: drop WARN_ON() dentry is NULL in ovl_encode_fh()

2022-08-17 14:22:51 +02:00

file.c

ovl: remove privs in ovl_fallocate()

2022-12-31 13:14:00 +01:00

inode.c

ovl: use ovl_copy_{real,upper}attr() wrappers

2022-12-31 13:14:00 +01:00

Kconfig

docs: fix broken references to text files

2020-04-20 15:35:59 -06:00

Makefile

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

namei.c

ovl: relax lookup error on mismatch origin ftype

2021-08-17 11:47:44 +02:00

overlayfs.h

ovl: use ovl_copy_{real,upper}attr() wrappers

2022-12-31 13:14:00 +01:00

ovl_entry.h

ovl: store lower path in ovl_inode

2022-12-31 13:14:00 +01:00

readdir.c

ovl: skip stale entries in merge dir cache iteration

2021-08-10 10:21:30 +02:00

super.c

ovl: fix use inode directly in rcu-walk mode

2022-12-31 13:14:47 +01:00

util.c

ovl: use ovl_copy_{real,upper}attr() wrappers

2022-12-31 13:14:00 +01:00