linux/fs/overlayfs
Miklos Szeredi 1f5573cfe7 ovl: fix warning in ovl_create_real()
Syzbot triggered the following warning in ovl_workdir_create() ->
ovl_create_real():

	if (!err && WARN_ON(!newdentry->d_inode)) {

The reason is that the cgroup2 filesystem returns from mkdir without
instantiating the new dentry.

Weird filesystems such as this will be rejected by overlayfs at a later
stage during setup, but to prevent such a warning, call ovl_mkdir_real()
directly from ovl_workdir_create() and reject this case early.

Reported-and-tested-by: syzbot+75eab84fd0af9e8bf66b@syzkaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2021-11-04 10:55:34 +01:00
..
copy_up.c ovl: use kvalloc in xattr copy-up 2021-08-17 11:47:45 +02:00
dir.c ovl: fix warning in ovl_create_real() 2021-11-04 10:55:34 +01:00
export.c ovl: fix uninitialized pointer read in ovl_lookup_real_one() 2021-08-10 10:21:30 +02:00
file.c ovl: fix use after free in struct ovl_aio_req 2021-10-29 13:48:19 +02:00
inode.c ovl: enable RCU'd ->get_acl() 2021-08-18 22:08:24 +02:00
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: fix warning in ovl_create_real() 2021-11-04 10:55:34 +01:00
ovl_entry.h ovl: implement volatile-specific fsync error behaviour 2021-01-28 10:22:48 +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 warning in ovl_create_real() 2021-11-04 10:55:34 +01:00
util.c ovl: consistent behavior for immutable/append-only inodes 2021-08-17 11:47:43 +02:00