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Max Kellermann 6a85606425 fs/kernfs/dir: obey S_ISGID 
[ Upstream commit 5133bee62f ]

Handling of S_ISGID is usually done by inode_init_owner() in all other
filesystems, but kernfs doesn't use that function.  In kernfs, struct
kernfs_node is the primary data structure, and struct inode is only
created from it on demand.  Therefore, inode_init_owner() can't be
used and we need to imitate its behavior.

S_ISGID support is useful for the cgroup filesystem; it allows
subtrees managed by an unprivileged process to retain a certain owner
gid, which then enables sharing access to the subtree with another
unprivileged process.

--
v1 -> v2: minor coding style fix (comment)

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20231208093310.297233-2-max.kellermann@ionos.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-02-05 20:17:04 +00:00
..
9p Bunch of small fixes: 2023-11-04 09:20:04 -10:00
adfs adfs: convert to new timestamp accessors 2023-10-18 13:26:18 +02:00
affs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
afs afs: fix the usage of read_seqbegin_or_lock() in afs_lookup_volume_rcu() 2024-02-05 20:16:47 +00:00
autofs autofs: add: new_inode check in autofs_fill_super() 2023-11-20 14:56:36 +01:00
bcachefs bcachefs: make RO snapshots actually RO 2024-01-01 11:47:07 -05:00
befs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
bfs bfs: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
btrfs btrfs: zoned: optimize hint byte for zoned allocator 2024-01-31 16:21:16 -08:00
cachefiles - Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list") 2023-08-29 14:25:26 -07:00
ceph ceph: select FS_ENCRYPTION_ALGS if FS_ENCRYPTION 2024-01-25 15:45:13 -08:00
coda coda: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
configfs configfs: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
cramfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
crypto This update includes the following changes: 2023-11-02 16:15:30 -10:00
debugfs debugfs: initialize cancellations earlier 2023-12-22 07:33:02 +01:00
devpts devpts: convert to new timestamp accessors 2023-10-18 13:26:20 +02:00
dlm dlm: use kernel_connect() and kernel_bind() 2024-01-31 16:21:00 -08:00
ecryptfs ecryptfs: Reject casefold directory inodes 2024-02-05 20:16:48 +00:00
efivarfs efivarfs: Free s_fs_info on unmount 2024-01-25 15:44:39 -08:00
efs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
erofs erofs: fix ztailpacking for subpage compressed blocks 2024-02-05 20:16:47 +00:00
exfat exfat: fix ctime is not updated 2023-11-03 22:24:11 +09:00
exportfs fs: fix build error with CONFIG_EXPORTFS=m or not defined 2023-10-28 16:16:19 +02:00
ext2 ext2: Fix ki_pos update for DIO buffered-io fallback case 2023-11-22 10:17:10 +01:00
ext4 ext4: avoid online resizing failures due to oversized flex bg 2024-02-05 20:16:49 +00:00
f2fs f2fs: fix to tag gcing flag on page during block migration 2024-02-05 20:16:59 +00:00
fat vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
freevxfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
fscache netfs, fscache: Prevent Oops in fscache_put_cache() 2024-01-31 16:21:06 -08:00
fuse fuse: disable FOPEN_PARALLEL_DIRECT_WRITES with FUSE_DIRECT_IO_ALLOW_MMAP 2023-12-04 10:19:32 +01:00
gfs2 gfs2: fix kernel BUG in gfs2_quota_cleanup 2024-01-25 15:44:43 -08:00
hfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
hfsplus vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
hostfs hostfs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
hpfs hpfs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
hugetlbfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
iomap Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
isofs isofs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
jbd2 jbd2: fix soft lockup in journal_finish_inode_data_buffers() 2023-12-12 10:25:46 -05:00
jffs2 vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
jfs jfs: fix array-index-out-of-bounds in diNewExt 2024-02-05 20:16:47 +00:00
kernfs fs/kernfs/dir: obey S_ISGID 2024-02-05 20:17:04 +00:00
lockd SUNRPC: change how svc threads are asked to exit. 2023-10-16 12:44:04 -04:00
minix minix: convert to new timestamp accessors 2023-10-18 14:08:23 +02:00
netfs netfs: Only call folio_start_fscache() one time for each folio 2023-09-18 12:03:46 -07:00
nfs pNFS: Fix the pnfs block driver's calculation of layoutget size 2024-01-25 15:44:44 -08:00
nfs_common NFSv4.2: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
nfsd nfsd: fix RELEASE_LOCKOWNER 2024-01-31 16:21:11 -08:00
nilfs2 nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage() 2023-12-06 16:12:50 -08:00
nls nls: Hide new NLS_UCS2_UTILS 2023-08-31 12:07:34 -05:00
notify vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ntfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ntfs3 vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ocfs2 ocfs2: Avoid touching renamed directory if parent does not change 2024-02-05 20:16:57 +00:00
omfs omfs: convert to new timestamp accessors 2023-10-18 14:08:25 +02:00
openpromfs openpromfs: convert to new timestamp accessors 2023-10-18 14:08:25 +02:00
orangefs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
overlayfs ovl: mark xwhiteouts directory with overlay.opaque='x' 2024-01-31 16:21:11 -08:00
proc sysctl: Fix out of bounds access for empty sysctl registers 2024-02-05 20:16:48 +00:00
pstore pstore/ram: Fix crash when setting number of cpus to an odd number 2024-02-05 20:16:47 +00:00
qnx4 qnx4: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
qnx6 qnx6: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
quota Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
ramfs ramfs: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
reiserfs reiserfs: Avoid touching renamed directory if parent does not change 2024-02-05 20:16:57 +00:00
romfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
smb cifs: fix in logging in cifs_chan_update_iface 2024-02-05 20:16:48 +00:00
squashfs squashfs: squashfs_read_data need to check if the length is 0 2023-12-06 16:12:45 -08:00
sysfs kernfs: sysfs: support custom llseek method for sysfs entries 2023-10-05 13:42:11 +02:00
sysv sysv: convert to new timestamp accessors 2023-10-18 14:08:28 +02:00
tracefs eventfs: Fix bitwise fields for "is_events" 2024-01-02 15:20:44 -05:00
ubifs ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path 2024-01-31 16:21:02 -08:00
udf \n 2023-11-02 08:19:51 -10:00
ufs fix ufs_get_locked_folio() breakage 2023-12-13 11:14:09 -05:00
unicode unicode: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:54 -07:00
vboxsf vboxsf: convert to new timestamp accessors 2023-10-18 14:08:29 +02:00
verity fsverity: skip PKCS#7 parser when keyring is empty 2023-08-20 10:33:43 -07:00
xfs xfs: read only mounts with fsopen mount API are busted 2024-01-31 16:21:12 -08:00
zonefs zonefs: convert to new timestamp accessors 2023-10-18 14:08:29 +02:00
aio.c aio: Annotate struct kioctx_table with __counted_by 2023-09-20 14:22:01 +02:00
anon_inodes.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
attr.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
bad_inode.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
binfmt_elf.c binfmt_elf: Only report padzero() errors when PROT_WRITE 2023-10-03 19:48:44 -07:00
binfmt_elf_fdpic.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_elf_test.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
binfmt_flat.c binfmt_flat: Remove shared library support 2022-04-22 10:57:18 -07:00
binfmt_misc.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_script.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
buffer.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
char_dev.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
compat_binfmt_elf.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
coredump.c v6.5/vfs.misc 2023-06-26 09:50:21 -07:00
d_path.c fs: d_path: include internal.h 2023-05-17 09:16:59 +02:00
dax.c mm: convert DAX lock/unlock page to lock/unlock folio 2023-10-04 10:32:20 -07:00
dcache.c fast_dput(): handle underflows gracefully 2024-02-05 20:16:57 +00:00
direct-io.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
drop_caches.c fs: drop_caches: draining pages before dropping caches 2023-08-18 10:12:11 -07:00
eventfd.c eventfd: prevent underflow for eventfd semaphores 2023-07-11 11:41:34 +02:00
eventpoll.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
exec.c exec: Fix error handling in begin_new_exec() 2024-01-31 16:21:11 -08:00
fcntl.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
fhandle.c exportfs: add helpers to check if filesystem can encode/decode file handles 2023-10-24 17:57:45 +02:00
file.c file, i915: fix file reference for mmap_singleton() 2023-10-25 22:17:04 +02:00
file_table.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
filesystems.c fs: simplify get_filesystem_list / get_all_fs_names 2021-08-23 01:25:40 -04:00
fs-writeback.c vfs-6.7.misc 2023-10-30 09:14:19 -10:00
fs_context.c fs: factor out vfs_parse_monolithic_sep() helper 2023-10-12 18:53:36 +03:00
fs_parser.c ext4: journal_path mount options should follow links 2022-12-01 10:46:54 -05:00
fs_pin.c switch the remnants of releasing the mountpoint away from fs_pin 2019-07-16 22:52:37 -04:00
fs_struct.c kill do_each_thread() 2023-08-21 13:46:25 -07:00
fs_types.c fs: common implementation of file type 2019-01-21 17:48:13 +01:00
fsopen.c fsconfig: ensure that dirfd is set to aux 2023-09-22 14:09:06 +02:00
init.c fs: add a new SB_I_NOUMASK flag 2023-10-19 11:02:47 +02:00
inode.c filemap: add a per-mapping stable writes flag 2023-11-20 15:05:18 +01:00
internal.h fs: store real path instead of fake path in backing file f_path 2023-10-19 11:03:15 +02:00
ioctl.c lsm: new security_file_ioctl_compat() hook 2024-01-31 16:21:00 -08:00
Kconfig mm/hugetlb: have CONFIG_HUGETLB_PAGE select CONFIG_XARRAY_MULTI 2023-12-06 16:12:49 -08:00
Kconfig.binfmt riscv: support the elf-fdpic binfmt loader 2023-08-23 14:17:43 -07:00
kernel_read_file.c fs: Fix kernel-doc warnings 2023-08-19 12:12:12 +02:00
libfs.c libfs: getdents() should return 0 after reaching EOD 2023-11-20 15:34:22 +01:00
locks.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
Makefile bcachefs: Initial commit 2023-10-22 17:08:07 -04:00
mbcache.c mbcache: dynamically allocate the mbcache shrinker 2023-10-04 10:32:25 -07:00
mnt_idmapping.c fs: export mnt_idmap_get/mnt_idmap_put 2023-11-03 23:28:33 +01:00
mount.h switch try_to_unlazy_next() to __legitimize_mnt() 2022-07-05 16:18:21 -04:00
mpage.c buffer: remove folio_create_empty_buffers() 2023-10-25 16:47:10 -07:00
namei.c rename(): fix the locking of subdirectories 2024-01-31 16:21:03 -08:00
namespace.c fs: indicate request originates from old mount API 2024-01-25 15:44:42 -08:00
nsfs.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
open.c cred: get rid of CONFIG_DEBUG_CREDENTIALS 2023-12-15 14:19:48 -08:00
pipe.c pipe: wakeup wr_wait after setting max_usage 2024-01-31 16:20:53 -08:00
pnode.c fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
pnode.h fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
posix_acl.c fs: convert to ctime accessor functions 2023-07-13 10:28:04 +02:00
proc_namespace.c tty, proc, kernfs, random: Use copy_splice_read() 2023-05-24 08:42:16 -06:00
read_write.c fs: Fix one kernel-doc comment 2023-08-15 08:32:45 +02:00
readdir.c vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
remap_range.c fs: use UB-safe check for signed addition overflow in remap_verify_area 2023-05-24 11:03:59 +02:00
select.c select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
seq_file.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
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 - Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list") 2023-08-29 14:25:26 -07:00
stack.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
stat.c fs: Pass AT_GETATTR_NOSEC flag to getattr interface function 2023-11-18 14:54:07 +01:00
statfs.c statfs: enforce statfs[64] structure initialization 2023-05-17 15:20:17 +02:00
super.c overlayfs update for 6.7-rc1 2023-11-07 11:46:31 -08:00
sync.c riscv: compat: syscall: Add compat_sys_call_table implementation 2022-04-26 13:36:25 -07:00
sysctls.c sysctl: Refactor base paths registrations 2023-05-23 21:43:26 -07:00
timerfd.c timerfd: Provide timerfd_resume() 2021-08-10 17:57:22 +02:00
userfaultfd.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
utimes.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
xattr.c xattr: make the xattr array itself const 2023-10-09 16:24:16 +02:00