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066dfc4290
linux/fs
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Linus Torvalds d888c83fce fs: fix fd table size alignment properly 
Jason Donenfeld reports that my commit 1c24a18639 ("fs: fd tables have
to be multiples of BITS_PER_LONG") doesn't work, and the reason is an
embarrassing brown-paper-bag bug.

Yes, we want to align the number of fds to BITS_PER_LONG, and yes, the
reason they might not be aligned is because the incoming 'max_fd'
argument might not be aligned.

But aligining the argument - while simple - will cause a "infinitely
big" maxfd (eg NR_OPEN_MAX) to just overflow to zero.  Which most
definitely isn't what we want either.

The obvious fix was always just to do the alignment last, but I had
moved it earlier just to make the patch smaller and the code look
simpler.  Duh.  It certainly made _me_ look simple.

Fixes: 1c24a18639 ("fs: fd tables have to be multiples of BITS_PER_LONG")
Reported-and-tested-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Fedor Pchelkin <aissur0002@gmail.com>
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-29 23:29:18 -07:00
..
9p Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
adfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
affs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
afs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
autofs
befs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
bfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
btrfs for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
cachefiles for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
ceph The highlights are: 2022-03-24 18:32:48 -07:00
cifs flexible-array transformations for 5.18-rc1 2022-03-24 11:39:32 -07:00
coda Folio changes for 5.18 2022-03-22 17:03:12 -07:00
configfs configfs: fix a race in configfs_{,un}register_subsystem() 2022-02-22 18:30:28 +01:00
cramfs
crypto fscrypt updates for 5.18 2022-03-22 09:50:16 -07:00
debugfs debugfs: Document that debugfs_create functions need not be error checked 2022-02-25 11:56:13 +01:00
devpts fsnotify: fix fsnotify hooks in pseudo filesystems 2022-01-24 14:17:02 +01:00
dlm driver core changes for 5.17-rc1 2022-01-12 11:11:34 -08:00
ecryptfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
efivarfs
efs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
erofs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
exfat Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
exportfs
ext2 \n 2022-03-25 17:38:15 -07:00
ext4 for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
f2fs for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
fat Merge branch 'akpm' (patches from Andrew) 2022-03-24 14:14:07 -07:00
freevxfs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
fscache fscache: Convert fscache_set_page_dirty() to fscache_dirty_folio() 2022-03-15 08:34:36 -04:00
fuse Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a 2022-03-27 10:17:23 -07:00
gfs2 for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
hfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
hfsplus Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
hostfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
hpfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
hugetlbfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
iomap Fix buffered write page prefaulting 2022-03-26 12:41:52 -07:00
isofs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
jbd2 Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
jffs2 fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
jfs A couple bug fixes 2022-03-29 18:17:30 -07:00
kernfs kernfs: fix typos in comments 2022-03-18 13:38:03 +01:00
ksmbd flexible-array transformations for 5.18-rc1 2022-03-24 11:39:32 -07:00
lockd NFSD: Move svc_serv_ops::svo_function into struct svc_serv 2022-02-28 10:26:40 -05:00
minix Merge branch 'akpm' (patches from Andrew) 2022-03-24 14:14:07 -07:00
netfs netfs: Make ops->init_rreq() optional 2022-01-21 21:36:28 +00:00
nfs NFS client updates for Linux 5.18 2022-03-29 18:55:37 -07:00
nfs_common
nfsd Folio changes for 5.18 2022-03-22 17:03:12 -07:00
nilfs2 Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
nls
notify fsnotify: remove redundant parameter judgment 2022-03-14 09:05:25 +01:00
ntfs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
ntfs3 Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
ocfs2 Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
omfs fs: Convert __set_page_dirty_buffers to block_dirty_folio 2022-03-16 13:37:04 -04:00
openpromfs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
orangefs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
overlayfs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
proc ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
pstore pstore: Don't use semaphores in always-atomic-context code 2022-03-15 11:08:23 -07:00
qnx4 fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
qnx6 fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
quota quota: make dquot_quota_sync return errors from ->sync_fs 2022-01-30 08:59:47 -08:00
ramfs
reiserfs \n 2022-03-25 17:38:15 -07:00
romfs fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00
smbfs_common smb3: add new defines from protocol specification 2022-01-18 16:50:47 -06:00
squashfs Merge branch 'akpm' (patches from Andrew) 2022-03-22 16:11:53 -07:00
sysfs kernfs: move struct kernfs_root out of the public view. 2022-02-23 15:46:34 +01:00
sysv Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
tracefs tracefs: Set the group ownership in apply_options() not parse_options() 2022-02-25 21:05:04 -05:00
ubifs Driver core changes for 5.18-rc1 2022-03-28 12:41:28 -07:00
udf \n 2022-03-25 17:38:15 -07:00
ufs Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
unicode Fix from Christoph Hellwig merging the CONFIG_UNICODE_UTF8_DATA into the 2022-02-01 11:13:24 -08:00
vboxsf Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
verity
xfs Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a 2022-03-27 10:17:23 -07:00
zonefs for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
aio.c for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
anon_inodes.c
attr.c fs: handle circular mappings correctly 2021-11-17 09:26:09 +01:00
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c coredump: Snapshot the vmas in do_coredump 2022-03-08 12:55:29 -06:00
binfmt_elf_test.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
binfmt_elf.c execve updates for v5.18-rc1 2022-03-21 19:16:02 -07:00
binfmt_flat.c coredump: Don't compile flat_core_dump when coredumps are disabled 2022-03-09 10:37:07 -06:00
binfmt_misc.c Fix regression due to "fs: move binfmt_misc sysctl to its own file" 2022-02-09 09:50:02 -08:00
binfmt_script.c
buffer.c for-5.18/write-streams-2022-03-18 2022-03-26 11:51:46 -07:00
char_dev.c
compat_binfmt_elf.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
coredump.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
d_path.c
dax.c dax for 5.18 2022-03-24 18:12:09 -07:00
dcache.c mm: dcache: use kmem_cache_alloc_lru() to allocate dentry 2022-03-22 15:57:03 -07:00
direct-io.c block: remove the per-bio/request write hint 2022-03-07 12:45:57 -07:00
drop_caches.c
eventfd.c
eventpoll.c eventpoll: simplify sysctl declaration with register_sysctl() 2022-01-22 08:33:35 +02:00
exec.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
fcntl.c fs: remove fs.f_write_hint 2022-03-08 17:55:03 -07:00
fhandle.c
file_table.c fs/file_table: fix adding missing kmemleak_not_leak() 2022-02-17 10:23:19 -08:00
file.c fs: fix fd table size alignment properly 2022-03-29 23:29:18 -07:00
filesystems.c
fs_context.c vfs: fs_context: fix up param length parsing in legacy_parse_param 2022-01-18 09:23:19 +02:00
fs_parser.c fs_parse: allow parameter value to be empty 2021-12-09 14:09:36 -05:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c Merge branch 'akpm' (patches from Andrew) 2022-03-22 16:11:53 -07:00
fsopen.c
init.c
inode.c fs: introduce alloc_inode_sb() to allocate filesystems specific inode 2022-03-22 15:57:03 -07:00
internal.h for-5.18-tag 2022-03-22 10:51:40 -07:00
io_uring.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
io-wq.c ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
io-wq.h Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
ioctl.c fs: allow cross-vfsmount reflink/dedupe 2022-03-14 13:13:53 +01:00
Kconfig Folio changes for 5.18 2022-03-22 17:03:12 -07:00
Kconfig.binfmt execve updates for v5.18-rc1 2022-03-21 19:16:02 -07:00
kernel_read_file.c
libfs.c fs: Convert __set_page_dirty_no_writeback to noop_dirty_folio 2022-03-16 13:37:05 -04:00
locks.c fs: move locking sysctls where they are used 2022-01-22 08:33:36 +02:00
Makefile Fix from Christoph Hellwig merging the CONFIG_UNICODE_UTF8_DATA into the 2022-02-01 11:13:24 -08:00
mbcache.c
mount.h
mpage.c for-5.18/alloc-cleanups-2022-03-25 2022-03-26 11:59:30 -07:00
namei.c \n 2022-01-28 17:51:31 +02:00
namespace.c fs.rt.v5.18 2022-03-24 10:06:43 -07:00
no-block.c
nsfs.c
open.c fs: remove fs.f_write_hint 2022-03-08 17:55:03 -07:00
pipe.c fs/pipe.c: local vars have to match types of proper pipe_inode_info fields 2022-03-23 19:00:34 -07:00
pnode.c
pnode.h
posix_acl.c fs: support mapped mounts of mapped filesystems 2021-12-05 10:28:57 +01:00
proc_namespace.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
read_write.c fs: export variant of generic_write_checks without iov_iter 2022-03-14 13:13:50 +01:00
readdir.c
remap_range.c Filesystem folio changes for 5.18 2022-03-22 18:26:56 -07:00
select.c select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
seq_file.c
signalfd.c Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
splice.c mm: Convert remove_mapping() to take a folio 2022-03-21 12:59:01 -04:00
stack.c
stat.c io-uring: Make statx API stable 2022-03-10 09:33:55 -07:00
statfs.c
super.c vfs: make freeze_super abort when sync_filesystem returns error 2022-01-30 08:59:47 -08:00
sync.c vfs: make sync_filesystem return errors from ->sync_fs 2022-01-30 08:59:47 -08:00
sysctls.c fs: move namespace sysctls and declare fs base directory 2022-01-22 08:33:36 +02:00
timerfd.c
userfaultfd.c userfaultfd: provide unmasked address on page-fault 2022-03-22 15:57:08 -07:00
utimes.c
xattr.c