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linux-stable/fs
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Marc Dionne ffbda400b2 afs: Don't cross .backup mountpoint from backup volume 
commit 29be9100ac upstream.

Don't cross a mountpoint that explicitly specifies a backup volume
(target is <vol>.backup) when starting from a backup volume.

It it not uncommon to mount a volume's backup directly in the volume
itself.  This can cause tools that are not paying attention to get
into a loop mounting the volume onto itself as they attempt to
traverse the tree, leading to a variety of problems.

This doesn't prevent the general case of loops in a sequence of
mountpoints, but addresses a common special case in the same way
as other afs clients.

Reported-by: Jan Henrik Sylvester <jan.henrik.sylvester@uni-hamburg.de>
Link: http://lists.infradead.org/pipermail/linux-afs/2024-May/008454.html
Reported-by: Markus Suvanto <markus.suvanto@gmail.com>
Link: http://lists.infradead.org/pipermail/linux-afs/2024-February/008074.html
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/768760.1716567475@warthog.procyon.org.uk
Reviewed-by: Jeffrey Altman <jaltman@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-06-16 13:28:48 +02:00
..
9p fs/9p: drop inodes immediately on non-.L too 2024-05-17 11:43:53 +02:00
adfs
affs affs: initialize fsdata in affs_truncate() 2023-02-06 07:52:36 +01:00
afs afs: Don't cross .backup mountpoint from backup volume 2024-06-16 13:28:48 +02:00
autofs autofs: fix memory leak of waitqueues in autofs_catatonic_mode 2023-09-23 11:00:02 +02:00
befs
bfs
btrfs btrfs: add missing mutex_unlock in btrfs_relocate_sys_chunks() 2024-05-25 16:17:18 +02:00
cachefiles cachefiles: fix memory leak in cachefiles_add_cache() 2024-03-06 14:36:10 +00:00
ceph ceph: fix deadlock or deadcode of misusing dget() 2024-02-23 08:25:03 +01:00
cifs smb: client: fix potential OOBs in smb2_parse_contexts() 2024-05-25 16:17:17 +02:00
coda coda: Avoid partial allocation of sig_inputArgs 2023-03-11 16:43:56 +01:00
configfs configfs: fix possible memory leak in configfs_create_dir() 2023-01-18 11:41:09 +01:00
cramfs
crypto fscrypt: add fscrypt_symlink_getattr() for computing st_size 2021-09-12 08:56:38 +02:00
debugfs new helper: lookup_positive_unlocked() 2023-09-23 10:59:40 +02:00
devpts fsnotify: fix fsnotify hooks in pseudo filesystems 2022-02-01 17:24:34 +01:00
dlm dlm: fix plock lookup when using multiple lockspaces 2023-09-23 10:59:55 +02:00
ecryptfs ecryptfs: Fix buffer size for tag 66 packet 2024-06-16 13:28:32 +02:00
efivarfs
efs
erofs erofs: ensure that the post-EOF tails are all zeroed 2023-09-23 10:59:36 +02:00
exportfs
ext2 ext2: fix datatype of block number in ext2_xattr_set2() 2023-09-23 11:00:04 +02:00
ext4 ext4: avoid excessive credit estimate in ext4_tmpfile() 2024-06-16 13:28:40 +02:00
f2fs f2fs: fix to release node block count in error path of f2fs_new_node_page() 2024-06-16 13:28:43 +02:00
fat fat: fix uninitialized field in nostale filehandles 2024-04-13 12:51:23 +02:00
freevxfs
fscache fscache: Fix cookie key hashing 2021-09-22 12:26:25 +02:00
fuse fuse: don't unhash root 2024-04-13 12:51:25 +02:00
gfs2 gfs2: Fix invalid metadata access in punch_hole 2024-05-17 11:43:50 +02:00
hfs hfs: fix missing hfs_bnode_get() in __hfs_bnode_create 2023-03-11 16:43:59 +01:00
hfsplus treewide: Remove uninitialized_var() usage 2023-06-09 10:29:01 +02:00
hostfs
hpfs
hugetlbfs fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super 2024-03-06 14:36:10 +00:00
iomap iomap: Set all uptodate bits for an Uptodate page 2024-03-01 13:13:35 +01:00
isofs isofs: handle CDs with bad root inode but good Joliet root directory 2024-04-13 12:51:38 +02:00
jbd2 jbd2: correct the printing of write_flags in jbd2_write_superblock() 2024-01-25 14:34:20 -08:00
jffs2 jffs2: prevent xattr node from overflowing the eraseblock 2024-06-16 13:28:33 +02:00
jfs jfs: fix array-index-out-of-bounds in diNewExt 2024-02-23 08:24:55 +01:00
kernfs fs/kernfs/dir: obey S_ISGID 2024-02-23 08:25:03 +01:00
lockd fs: lockd: avoid possible wrong NULL parameter 2023-09-23 10:59:48 +02:00
minix minix: fix bug when opening a file with O_DIRECT 2022-04-15 14:18:35 +02:00
nfs nfs: Handle error of rpc_proc_register() in nfs_net_init(). 2024-05-17 11:43:48 +02:00
nfs_common
nfsd nfsd: fix file memleak on client_opens_release 2023-11-28 16:50:21 +00:00
nilfs2 nilfs2: fix out-of-range warning 2024-06-16 13:28:32 +02:00
nls fs/nls: make load_nls() take a const parameter 2023-09-23 10:59:38 +02:00
notify fanotify: disallow mount/sb marks on kernel internal pseudo fs 2023-07-27 08:37:26 +02:00
ntfs ntfs: check overflow when iterating ATTR_RECORDs 2022-11-25 17:42:22 +01:00
ocfs2 fs: move S_ISGID stripping into the vfs_*() helpers 2024-02-23 08:24:49 +01:00
omfs treewide: Remove uninitialized_var() usage 2023-06-09 10:29:01 +02:00
openpromfs openpromfs: finish conversion to the new mount API 2024-06-16 13:28:32 +02:00
orangefs orangefs: Fix kmemleak in orangefs_{kernel,client}_debug_init() 2023-01-18 11:41:39 +01:00
overlayfs ovl: skip overlayfs superblocks at global sync 2023-12-08 08:44:27 +01:00
proc procfs: block chmod on /proc/thread-self/comm 2023-09-23 10:59:55 +02:00
pstore pstore/ram: Fix crash when setting number of cpus to an odd number 2024-02-23 08:24:55 +01:00
qnx4 qnx4: work around gcc false positive warning bug 2021-09-30 10:09:26 +02:00
qnx6
quota quota: Fix rcu annotations of inode dquot pointers 2024-03-26 18:22:20 -04:00
ramfs
reiserfs reiserfs: Check the return value from __getblk() 2023-09-23 10:59:40 +02:00
romfs
squashfs revert "squashfs: harden sanity check in squashfs_read_xattr_id_table" 2023-02-22 12:50:39 +01:00
sysfs fs: sysfs: Fix reference leak in sysfs_break_active_protection() 2024-05-02 16:18:32 +02:00
sysv sysv: don't call sb_bread() with pointers_lock held 2024-04-13 12:51:38 +02:00
tracefs tracefs: Add missing lockdown check to tracefs_create_dir() 2023-09-23 11:00:06 +02:00
ubifs ubifs: Set page uptodate in the correct place 2024-04-13 12:51:23 +02:00
udf udf: initialize newblock to 0 2023-09-23 10:59:56 +02:00
ufs
unicode
verity fsverity: skip PKCS#7 parser when keyring is empty 2023-09-23 10:59:55 +02:00
xfs xfs: verify buffer contents when we skip log replay 2023-06-28 10:18:42 +02:00
aio.c fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion 2024-04-13 12:51:29 +02:00
anon_inodes.c
attr.c attr: block mode changes of symlinks 2023-09-23 11:00:06 +02:00
bad_inode.c
binfmt_aout.c binfmt: Move install_exec_creds after setup_new_exec to match binfmt_elf 2023-01-18 11:41:46 +01:00
binfmt_elf.c elf: don't use MAP_FIXED_NOREPLACE for elf interpreter mappings 2021-10-06 15:42:35 +02:00
binfmt_elf_fdpic.c fs: binfmt_elf_efpic: fix personality for ELF-FDPIC 2023-10-10 21:46:42 +02:00
binfmt_em86.c
binfmt_flat.c binfmt: Move install_exec_creds after setup_new_exec to match binfmt_elf 2023-01-18 11:41:46 +01:00
binfmt_misc.c binfmt_misc: fix shift-out-of-bounds in check_special_flags 2023-01-18 11:41:33 +01:00
binfmt_script.c
block_dev.c block: Don't invalidate pagecache for invalid falloc modes 2024-01-08 11:29:48 +01:00
buffer.c mm: fs: initialize fsdata passed to write_begin/write_end interface 2022-11-25 17:42:22 +01:00
char_dev.c chardev: fix error handling in cdev_device_add() 2023-01-18 11:41:25 +01:00
compat.c
compat_binfmt_elf.c
compat_ioctl.c lsm: new security_file_ioctl_compat() hook 2024-02-23 08:25:15 +01:00
coredump.c
d_path.c
dax.c dax: fix cache flush on PMD-mapped pages 2022-06-14 18:11:41 +02:00
dcache.c fast_dput(): handle underflows gracefully 2024-02-23 08:25:00 +01:00
dcookies.c
direct-io.c
drop_caches.c
eventfd.c eventfd: prevent underflow for eventfd semaphores 2023-09-23 10:59:40 +02:00
eventpoll.c epoll: ep_autoremove_wake_function should use list_del_init_careful 2023-06-28 10:18:35 +02:00
exec.c exec: Fix NOMMU linux_binprm::exec in transfer_args_to_stack() 2024-04-13 12:51:31 +02:00
fcntl.c fcntl: fix potential deadlock for &fasync_struct.fa_lock 2021-09-15 09:47:28 +02:00
fhandle.c do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak 2024-03-26 18:22:13 -04:00
file.c fs: prevent out-of-bounds array speculation when closing a file descriptor 2023-03-17 08:32:47 +01:00
file_table.c SUNRPC: Ensure we flush any closed sockets before xs_xprt_free() 2022-05-25 09:14:34 +02:00
filesystems.c
fs-writeback.c writeback: fix call of incorrect macro 2023-05-17 11:35:58 +02:00
fs_context.c fs: avoid empty option when generating legacy mount string 2023-07-27 08:37:25 +02:00
fs_parser.c
fs_pin.c
fs_struct.c
fs_types.c
fsopen.c
inode.c fs: move S_ISGID stripping into the vfs_*() helpers 2024-02-23 08:24:49 +01:00
internal.h fs: Establish locking order for unrelated directories 2023-07-27 08:37:26 +02:00
io_uring.c io_uring: fail NOP if non-zero op flags is passed in 2024-06-16 13:28:48 +02:00
ioctl.c
Kconfig
Kconfig.binfmt
libfs.c libfs: add DEFINE_SIMPLE_ATTRIBUTE_SIGNED for signed value 2023-01-18 11:40:55 +01:00
locks.c locks: fix KASAN: use-after-free in trace_event_raw_event_filelock_lock 2023-09-23 11:00:02 +02:00
Makefile
mbcache.c mbcache: Avoid nesting of cache->c_list_lock under bit locks 2023-01-18 11:41:59 +01:00
mount.h
mpage.c
namei.c fs: move S_ISGID stripping into the vfs_*() helpers 2024-02-23 08:24:49 +01:00
namespace.c fs: warn about impending deprecation of mandatory locks 2021-08-26 08:36:22 -04:00
no-block.c
nsfs.c
open.c fs: add a vfs_fchmod helper 2024-04-13 12:51:35 +02:00
pipe.c
pnode.c pnode: terminate at peers of source 2023-01-18 11:41:44 +01:00
pnode.h
posix_acl.c
proc_namespace.c
read_write.c
readdir.c
select.c fs/select: rework stack allocation hack for clang 2024-03-26 18:22:13 -04:00
seq_file.c
signalfd.c io_uring: disable polling pollfree files 2022-09-05 10:27:47 +02:00
splice.c Revert "fs: check FMODE_LSEEK to control internal pipe splicing" 2022-10-17 17:24:32 +02:00
stack.c
stat.c stat: fix inconsistency between struct stat and struct compat_stat 2022-04-27 13:50:48 +02:00
statfs.c statfs: enforce statfs[64] structure initialization 2023-05-30 12:44:07 +01:00
super.c fs: Protect reconfiguration of sb read-write from racing writes 2023-08-11 11:53:59 +02:00
sync.c ovl: skip overlayfs superblocks at global sync 2023-12-08 08:44:27 +01:00
timerfd.c
userfaultfd.c userfaultfd: open userfaultfds with O_RDONLY 2022-10-26 13:22:21 +02:00
utimes.c
xattr.c fs: don't audit the capability check in simple_xattr_list() 2023-01-18 11:40:53 +01:00