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Tejun Heo dc9a5fd2f3 kernfs: fix ino wrap-around detection 
commit e23f568aa63f64cd6b355094224cc9356c0f696b upstream.

When the 32bit ino wraps around, kernfs increments the generation
number to distinguish reused ino instances.  The wrap-around detection
tests whether the allocated ino is lower than what the cursor but the
cursor is pointing to the next ino to allocate so the condition never
triggers.

Fix it by remembering the last ino and comparing against that.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: 4a3ef68acacf ("kernfs: implement i_generation")
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-17 20:38:50 +01:00
..
9p
9p: avoid attaching writeback_fid on mmap with type PRIVATE
2019-10-11 18:18:38 +02:00
adfs
fs/adfs: super: fix use-after-free bug
2019-08-06 19:05:21 +02:00
affs
affs_lookup(): close a race with affs_remove_link()
2018-05-30 07:51:47 +02:00
afs
afs: Fix directory permissions check
2018-07-08 15:30:51 +02:00
autofs4
autofs: fix a leak in autofs_expire_indirect()
2019-12-17 20:37:24 +01:00
befs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bfs
bfs: add sanity check at bfs_fill_super()
2018-12-01 09:42:51 +01:00
btrfs
btrfs: only track ref_heads in delayed_ref_updates
2019-12-05 15:37:25 +01:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-12-17 09:28:53 +01:00
ceph
ceph: return -EINVAL if given fsc mount option on kernel w/o support
2019-12-05 15:37:06 +01:00
cifs
CIFS: Fix SMB2 oplock break processing
2019-12-17 20:38:49 +01:00
coda
coda: add error handling for fget
2019-08-06 19:05:23 +02:00
configfs
configfs: fix a deadlock in configfs_symlink()
2019-11-12 19:18:18 +01:00
cramfs
Cramfs: fix abad comparison when wrap-arounds occur
2018-11-13 11:15:12 -08:00
crypto
fscrypt: clean up some BUG_ON()s in block encryption/decryption
2019-07-31 07:28:22 +02:00
debugfs
debugfs: fix use-after-free on symlink traversal
2019-05-08 07:20:49 +02:00
devpts
fs/devpts: always delete dcache dentry-s in dput()
2019-03-23 14:35:21 +01:00
dlm
dlm: fix invalid cluster name warning
2019-12-17 20:38:33 +01:00
ecryptfs
ecryptfs_lookup_interpose(): lower_dentry->d_parent is not stable either
2019-11-20 17:59:32 +01:00
efivarfs
VFS: Kill off s_options and helpers
2017-07-11 06:09:21 -04:00
efs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
exofs
exofs_mount(): fix leaks on failure exits
2019-12-05 15:37:28 +01:00
exportfs
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-12-17 20:37:26 +01:00
ext2
ext2: Fix underflow in ext2_max_size()
2019-03-23 14:35:23 +01:00
ext4
ext4: add more paranoia checking in ext4_expand_extra_isize handling
2019-12-05 15:38:19 +01:00
f2fs
f2fs: fix to allow node segment for GC by ioctl path
2019-12-17 20:38:12 +01:00
fat
fat: work around race with userspace's read via blockdev while mounting
2019-10-07 18:55:12 +02:00
freevxfs
…
fscache
fscache: fix race between enablement and dropping of object
2018-12-17 09:28:53 +01:00
fuse
fuse: verify attributes
2019-12-17 20:38:44 +01:00
gfs2
gfs2: take jdata unstuff into account in do_grow
2019-12-05 15:37:32 +01:00
hfs
fs/hfs/extent.c: fix array out of bounds read of array extent
2019-12-01 09:13:57 +01:00
hfsplus
hfsplus: update timestamps on truncate()
2019-12-01 09:13:56 +01:00
hostfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hpfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hugetlbfs
hugetlb: use same fault hash key for shared and private mappings
2019-05-31 06:47:12 -07:00
isofs
isofs: reject hardware sector size > 2048 bytes
2018-10-03 17:00:57 -07:00
jbd2
jbd2: introduce jbd2_inode dirty range scoping
2019-07-31 07:28:47 +02:00
jffs2
jffs2: fix use-after-free on symlink traversal
2019-05-08 07:20:49 +02:00
jfs
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
2018-08-09 12:16:39 +02:00
kernfs
kernfs: fix ino wrap-around detection
2019-12-17 20:38:50 +01:00
lockd
lockd: fix decoding of TEST results
2019-12-17 20:38:15 +01:00
minix
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ncpfs
staging: ncpfs: memory corruption in ncp_read_kernel()
2018-03-28 18:24:43 +02:00
nfs
NFSv4.x: fix lock recovery during delegation recall
2019-11-24 08:23:12 +01:00
nfs_common
lockd: fix "list_add double add" caused by legacy signal interface
2018-02-03 17:39:08 +01:00
nfsd
nfsd: Return EPERM, not EACCES, in some SETATTR cases
2019-12-17 20:38:36 +01:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-30 07:51:47 +02:00
nls
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
notify
fanotify: fix handling of events on child sub-directory
2019-02-06 17:31:37 +01:00
ntfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ocfs2
ocfs2: clear journal dirty flag after shutdown journal
2019-12-05 15:37:51 +01:00
omfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
openpromfs
…
orangefs
orangefs: rate limit the client not running info message
2019-11-24 08:23:30 +01:00
overlayfs
ovl: filter of trusted xattr results in audit
2019-10-05 12:48:09 +02:00
proc
proc/vmcore: Fix i386 build error of missing copy_oldmem_page_encrypted()
2019-11-24 08:23:23 +01:00
pstore
pstore/ram: Avoid NULL deref in ftrace merging failure path
2019-12-17 20:38:34 +01:00
qnx4
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
qnx6
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
quota
quota: fix a problem about transfer quota
2019-07-21 09:04:28 +02:00
ramfs
mm: make pagevec_lookup() update index
2017-09-06 17:27:26 -07:00
reiserfs
reiserfs: propagate errors from fill_with_dentries() properly
2018-11-27 16:10:46 +01:00
romfs
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-09-05 09:26:32 +02:00
sysfs
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
2018-09-05 09:26:41 +02:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-12-17 09:28:48 +01:00
tracefs
VFS: Don't use save/replace_mount_options if not using generic_show_options
2017-07-06 03:31:46 -04:00
ubifs
ubifs: Correctly use tnc_next() in search_dh_cookie()
2019-09-19 09:08:06 +02:00
udf
udf: Fix incorrect final NOT_ALLOCATED (hole) extent length
2019-07-21 09:04:30 +02:00
ufs
ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
2019-05-25 18:25:36 +02:00
xfs
xfs: Fix bulkstat compat ioctls on x32 userspace.
2019-12-05 15:37:33 +01:00
aio.c
aio: fix spectre gadget in lookup_ioctx
2018-12-21 14:13:04 +01:00
anon_inodes.c
…
attr.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bad_inode.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
binfmt_aout.c
fs: fix kernel_read prototype
2017-09-04 19:05:15 -04:00
binfmt_elf_fdpic.c
Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-09-14 18:13:32 -07:00
binfmt_elf.c
binfmt_elf: Do not move brk for INTERP-less ET_EXEC
2019-10-05 12:48:06 +02:00
binfmt_em86.c
…
binfmt_flat.c
fs/binfmt_flat.c: make load_flat_shared_library() work
2019-07-03 13:15:59 +02:00
binfmt_misc.c
fs/binfmt_misc.c: do not allow offset overflow
2018-06-26 08:06:33 +08:00
binfmt_script.c
exec: load_script: Do not exec truncated interpreter path
2019-11-06 12:42:59 +01:00
block_dev.c
block: fix the return errno for direct IO
2019-04-17 08:37:53 +02:00
buffer.c
fs: fix guard_bio_eod to check for real EOD errors
2019-04-05 22:31:28 +02:00
char_dev.c
chardev: add additional check for minor range overlap
2019-05-31 06:47:31 -07:00
compat_binfmt_elf.c
…
compat_ioctl.c
media: dvb: fix compat ioctl translation
2019-11-20 17:59:57 +01:00
compat.c
…
coredump.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dax.c
fs/dax.c: release PMD lock even when there is no PMD support in DAX
2018-04-26 11:02:14 +02:00
dcache.c
fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
2019-02-06 17:31:34 +01:00
dcookies.c
…
direct-io.c
iomap: report collisions between directio and buffered writes to userspace
2019-04-27 09:35:41 +02:00
drop_caches.c
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-03-13 14:03:18 -07:00
eventfd.c
There has been a fair amount of activity in the docs tree this time
2017-07-03 21:13:25 -07:00
eventpoll.c
fs/epoll: drop ovflist branch prediction
2019-02-12 19:46:10 +01:00
exec.c
exit/exec: Seperate mm_release()
2019-12-05 15:38:25 +01:00
fcntl.c
fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
2017-12-17 15:07:59 +01:00
fhandle.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
file_table.c
fput: Don't reinvent the wheel but use existing llist API
2017-08-28 00:50:23 -04:00
file.c
fs/file.c: initialize init_files.resize_wait
2019-04-05 22:31:28 +02:00
filesystems.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fs_pin.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fs_struct.c
…
fs-writeback.c
cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead
2019-11-12 19:18:47 +01:00
inode.c
Abort file_remove_privs() for non-reg. files
2019-06-22 08:16:19 +02:00
internal.h
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2017-09-13 09:11:44 -07:00
ioctl.c
vfs: swap names of {do,vfs}_clone_file_range()
2018-11-10 07:48:33 -08:00
iomap.c
iomap: sub-block dio needs to zeroout beyond EOF
2019-12-17 20:38:00 +01:00
Kconfig
fs/Kconfig: kill CONFIG_PERCPU_RWSEM some more
2017-07-12 16:26:00 -07:00
Kconfig.binfmt
…
libfs.c
Fix the locking in dcache_readdir() and friends
2019-10-17 13:43:52 -07:00
locks.c
fs/lock: skip lock owner pid translation in case we are in init_pid_ns
2018-10-03 17:00:53 -07:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mbcache.c
mbcache: initialize entry->e_referenced in mb_cache_entry_create()
2018-02-22 15:42:25 +01:00
mount.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mpage.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
namei.c
namei: allow restricted O_CREAT of FIFOs and regular files
2018-12-01 09:42:59 +01:00
namespace.c
mount: Prevent MNT_DETACH from disconnecting locked mounts
2018-11-21 09:24:14 +01:00
no-block.c
…
nsfs.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
open.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-07-31 07:28:58 +02:00
pipe.c
fs: prevent page refcount overflow in pipe_buf_get
2019-05-04 09:15:18 +02:00
pnode.c
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-05-23 08:41:17 -05:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
read_write.c
vfs: avoid problematic remapping requests into partial EOF block
2019-12-01 09:13:51 +01:00
readdir.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
select.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
seq_file.c
seq_file: fix incomplete reset on read from zero offset
2018-02-22 15:42:28 +01:00
signalfd.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
splice.c
fs: prevent page refcount overflow in pipe_buf_get
2019-05-04 09:15:18 +02:00
stack.c
…
stat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-11 18:18:48 +02:00
super.c
fs: don't scan the inode cache before SB_BORN is set
2018-05-30 07:51:47 +02:00
sync.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
timerfd.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
userfaultfd.c
userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
2019-08-29 08:26:43 +02:00
utimes.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-10-10 08:54:27 +02:00