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Mike Kravetz 6b0010ed71 hugetlbfs: prevent filesystem stacking of hugetlbfs 
[ Upstream commit 15568299b7d9988063afce60731df605ab236e2a ]

syzbot found issues with having hugetlbfs on a union/overlay as reported
in [1].  Due to the limitations (no write) and special functionality of
hugetlbfs, it does not work well in filesystem stacking.  There are no
know use cases for hugetlbfs stacking.  Rather than making modifications
to get hugetlbfs working in such environments, simply prevent stacking.

[1] https://lore.kernel.org/linux-mm/000000000000b4684e05a2968ca6@google.com/

Reported-by: syzbot+d6ec23007e951dadf3de@syzkaller.appspotmail.com
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Colin Walters <walters@verbum.org>
Link: http://lkml.kernel.org/r/80f869aa-810d-ef6c-8888-b46cee135907@oracle.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-03 11:26:48 +02:00
..
9p
9p: Fix memory leak in v9fs_mount
2020-08-19 08:16:24 +02:00
adfs
…
affs
affs: fix a memory leak in affs_remount
2020-01-17 19:48:50 +01:00
afs
afs: Fix NULL deref in afs_dynroot_depopulate()
2020-08-26 10:41:05 +02:00
autofs
autofs: fix a leak in autofs_expire_indirect()
2019-10-25 00:03:11 -04:00
befs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
bfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
btrfs
btrfs: make btrfs_qgroup_check_reserved_leak take btrfs_inode
2020-09-03 11:26:47 +02:00
cachefiles
cachefiles: Fix race between read_waiter and read_copier involving op->to_do
2020-06-03 08:21:11 +02:00
ceph
ceph: do not access the kiocb after aio requests
2020-09-03 11:26:47 +02:00
cifs
cifs: Fix leak when handling lease break for cached root fid
2020-08-21 13:05:24 +02:00
coda
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
configfs
configfs: fix config_item refcnt leak in configfs_rmdir()
2020-05-27 17:46:30 +02:00
cramfs
cramfs: fix usage on non-MTD device
2019-11-23 21:44:49 -05:00
crypto
fscrypt: don't evict dirty inodes after removing key
2020-03-18 07:17:53 +01:00
debugfs
debugfs: Check module state before warning in {full/open}_proxy_open()
2020-04-17 10:50:02 +02:00
devpts
devpts_pty_kill(): don't bother with d_delete()
2019-09-03 09:30:56 -04:00
dlm
dlm: Fix kobject memleak
2020-08-19 08:16:21 +02:00
ecryptfs
ecryptfs: replace BUG_ON with error handling code
2020-02-28 17:22:26 +01:00
efivarfs
…
efs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
erofs
erofs: fix extended inode could cross boundary
2020-08-19 08:16:26 +02:00
exportfs
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-11-10 11:56:05 -05:00
ext2
ext2: fix missing percpu_counter_inc
2020-08-21 13:05:26 +02:00
ext4
ext4: don't allow overlapping system zones
2020-08-26 10:40:58 +02:00
f2fs
f2fs: fix use-after-free issue
2020-09-03 11:26:46 +02:00
fat
fat: don't allow to mount if the FAT length == 0
2020-06-17 16:40:36 +02:00
freevxfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
fscache
…
fuse
fuse: fix weird page warning
2020-07-29 10:18:28 +02:00
gfs2
gfs2: Never call gfs2_block_zero_range with an open transaction
2020-08-26 10:40:48 +02:00
hfs
…
hfsplus
hfsplus: fix crash and filesystem corruption when deleting files
2020-04-17 10:50:22 +02:00
hostfs
…
hpfs
fs: hpfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
hugetlbfs
hugetlbfs: prevent filesystem stacking of hugetlbfs
2020-09-03 11:26:48 +02:00
iomap
iomap: fix return value of iomap_dio_bio_actor on 32bit systems
2020-01-04 19:17:31 +01:00
isofs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
jbd2
jbd2: add the missing unlock_buffer() in the error path of jbd2_write_superblock()
2020-08-26 10:40:52 +02:00
jffs2
jffs2: fix UAF problem
2020-08-26 10:40:56 +02:00
jfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
kernfs
kernfs: do not call fsnotify() with name without a parent
2020-08-19 08:16:12 +02:00
lockd
…
minix
fs/minix: remove expected error message in block_to_path()
2020-08-21 13:05:37 +02:00
nfs
nfs: Fix getxattr kernel panic and memory overflow
2020-08-21 13:05:37 +02:00
nfs_common
…
nfsd
nfsd: Fix NFSv4 READ on RDMA when using readv
2020-08-11 15:33:42 +02:00
nilfs2
nilfs2: fix null pointer dereference at nilfs_segctor_do_construct()
2020-06-17 16:40:29 +02:00
nls
…
notify
fanotify: fix ignore mask logic for events on child and on dir
2020-06-17 16:40:24 +02:00
ntfs
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
ocfs2
ocfs2: change slot number type s16 to u16
2020-08-21 13:05:26 +02:00
omfs
fs: omfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
openpromfs
…
orangefs
orangefs: get rid of knob code...
2020-08-21 13:05:29 +02:00
overlayfs
ovl: fix unneeded call to ovl_change_flags()
2020-07-22 09:33:12 +02:00
proc
proc: Use new_inode not new_inode_pseudo
2020-06-17 16:40:33 +02:00
pstore
pstore: Fix linking when crypto API disabled
2020-08-19 08:16:27 +02:00
qnx4
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
qnx6
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
quota
fs: avoid softlockups in s_inodes iterators
2020-01-12 12:21:37 +01:00
ramfs
vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
2019-09-12 21:05:34 -04:00
reiserfs
reiserfs: prevent NULL pointer dereference in reiserfs_insert_item()
2020-02-24 08:37:00 +01:00
romfs
romfs: fix uninitialized memory leak in romfs_dev_read()
2020-08-26 10:40:51 +02:00
squashfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
sysfs
…
sysv
fs: sysv: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
tracefs
tracing: Do not create tracefs files if tracefs lockdown is in effect
2019-10-12 20:49:07 -04:00
ubifs
ubifs: Fix wrong orphan node deletion in ubifs_jnl_update|rename
2020-08-21 13:05:35 +02:00
udf
udf: Fix free space reporting for metadata and virtual partitions
2020-02-24 08:36:44 +01:00
ufs
fs/ufs: avoid potential u32 multiplication overflow
2020-08-21 13:05:37 +02:00
unicode
unicode: make array 'token' static const, makes object smaller
2019-09-17 11:48:24 -04:00
verity
fs-verity: support builtin file signatures
2019-08-12 19:33:50 -07:00
xfs
xfs: Don't allow logging of XFS_ISTALE inodes
2020-09-03 11:26:44 +02:00
aio.c
aio: fix async fsync creds
2020-06-17 16:40:24 +02:00
anon_inodes.c
…
attr.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
2020-06-03 08:21:27 +02:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-09-03 11:26:39 +02:00
binfmt_misc.c
…
binfmt_script.c
…
block_dev.c
block: Fix use-after-free in blkdev_get()
2020-06-24 17:50:47 +02:00
buffer.c
ext4: use non-movable memory for superblock readahead
2020-04-23 10:36:15 +02:00
char_dev.c
chardev: Avoid potential use-after-free in 'chrdev_open()'
2020-01-14 20:08:18 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP
2020-01-09 10:20:05 +01:00
compat.c
…
coredump.c
coredump: fix crash when umh is disabled
2020-05-14 07:58:27 +02:00
d_path.c
[PATCH] fix d_absolute_path() interplay with fsmount()
2019-08-30 19:31:09 -04:00
dax.c
dax: pass NOWAIT flag to iomap_apply
2020-03-05 16:43:36 +01:00
dcache.c
…
dcookies.c
…
direct-io.c
fs/direct-io.c: fix kernel-doc warning
2019-10-14 15:04:01 -07:00
drop_caches.c
fs: avoid softlockups in s_inodes iterators
2020-01-12 12:21:37 +01:00
eventfd.c
eventfd: track eventfd_signal() recursion depth
2020-02-11 04:35:37 -08:00
eventpoll.c
do_epoll_ctl(): clean the failure exits up a bit
2020-08-26 10:41:07 +02:00
exec.c
exec: Move would_dump into flush_old_exec
2020-05-20 08:20:34 +02:00
fcntl.c
…
fhandle.c
fs/handle.c - fix up kerneldoc
2019-08-07 21:51:47 -04:00
file_table.c
vfs: Export flush_delayed_fput for use by knfsd.
2019-08-19 11:00:39 -04:00
file.c
fix multiplication overflow in copy_fdtable()
2020-05-27 17:46:12 +02:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-17 10:50:21 +02:00
fs_context.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
fs_parser.c
vfs: Make fs_parse() handle fs_param_is_fd-type params better
2019-09-12 21:06:14 -04:00
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
memcg: fix a crash in wb_workfn when a device disappears
2020-02-11 04:35:11 -08:00
fsopen.c
…
inode.c
futex: Fix inode life-time issue
2020-03-25 08:25:58 +01:00
internal.h
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
io_uring.c
io_uring: Fix NULL pointer dereference in loop_rw_iter()
2020-08-19 08:16:29 +02:00
ioctl.c
compat_ioctl: add compat_ptr_ioctl()
2019-12-17 19:55:30 +01:00
Kconfig
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
Kconfig.binfmt
…
libfs.c
libfs: fix infoleak in simple_attr_read()
2020-04-01 11:02:17 +02:00
locks.c
locks: reinstate locks_delete_block optimization
2020-03-25 08:25:41 +01:00
Makefile
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
mbcache.c
…
mount.h
…
mpage.c
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
namei.c
namei: only return -ECHILD from follow_dotdot_rcu()
2020-03-05 16:43:48 +01:00
namespace.c
fs/namespace.c: fix use-after-free of mount in mnt_warn_timestamp_expiry()
2019-10-16 23:15:09 -04:00
no-block.c
…
nsfs.c
…
open.c
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:17:51 +01:00
pipe.c
…
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-05-02 08:48:44 +02:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
read_write.c
fs: allow deduplication of eof block into the end of the destination file
2020-02-11 04:35:23 -08:00
readdir.c
readdir: be more conservative with directory entry names
2020-01-29 16:45:31 +01:00
select.c
…
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
fs/signalfd.c: fix inconsistent return codes for signalfd4
2020-08-26 10:40:58 +02:00
splice.c
splice: only read in as much information as there is pipe buffer space
2019-12-17 19:56:52 +01:00
stack.c
…
stat.c
…
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-03 14:21:35 -07:00
super.c
Fix use after free in get_tree_bdev()
2020-05-06 08:15:15 +02:00
sync.c
…
timerfd.c
timerfd: Prepare for PREEMPT_RT
2019-08-01 20:51:23 +02:00
userfaultfd.c
userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK
2020-01-04 19:18:32 +01:00
utimes.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
xattr.c
xattr: break delegations in {set,remove}xattr
2020-08-11 15:33:39 +02:00