AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/fs
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Amir Goldstein 77e8dac659 fuse: fix illegal access to inode with reused nodeid 
commit 15db16837a35d8007cb8563358787412213db25e upstream.

Server responds to LOOKUP and other ops (READDIRPLUS/CREATE/MKNOD/...)
with ourarg containing nodeid and generation.

If a fuse inode is found in inode cache with the same nodeid but different
generation, the existing fuse inode should be unhashed and marked "bad" and
a new inode with the new generation should be hashed instead.

This can happen, for example, with passhrough fuse filesystem that returns
the real filesystem ino/generation on lookup and where real inode numbers
can get recycled due to real files being unlinked not via the fuse
passthrough filesystem.

With current code, this situation will not be detected and an old fuse
dentry that used to point to an older generation real inode, can be used to
access a completely new inode, which should be accessed only via the new
dentry.

Note that because the FORGET message carries the nodeid w/o generation, the
server should wait to get FORGET counts for the nlookup counts of the old
and reused inodes combined, before it can free the resources associated to
that nodeid.

Stable backport notes:
* This is not a regression. The bug has been in fuse forever, but only
  a certain class of low level fuse filesystems can trigger this bug
* Because there is no way to check if this fix is applied in runtime,
  libfuse test_examples.py tests this fix with hardcoded check for
  kernel version >= 5.14
* After backport to stable kernel(s), the libfuse test can be updated
  to also check minimal stable kernel version(s)
* Depends on "fuse: fix bad inode" which is already applied to stable
  kernels v5.4.y and v5.10.y
* Required backporting helper inode_wrong_type()

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-fsdevel/CAOQ4uxi8DymG=JO_sAU+wS8akFdzh+PuXwW3Ebgahd2Nwnh7zA@mail.gmail.com/
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-05 19:05:18 +02:00
..
9p new helper: inode_wrong_type() 2024-07-05 19:05:18 +02:00
adfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
affs fs/affs: release old buffer head on error path 2021-03-04 11:38:37 +01:00
afs afs: Fix tracepoint string placement with built-in AFS 2021-07-28 14:35:41 +02:00
aufs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
autofs autofs: harden ioctl table 2020-10-16 11:11:22 -07:00
befs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
bfs bfs: don't use WARNING: string when it's just info. 2021-01-06 14:56:52 +01:00
btrfs btrfs: fix race between marking inode needs to be logged and log syncing 2024-07-05 19:00:50 +02:00
cachefiles fs/cachefiles: Remove wait_bit_key layout dependency 2021-03-30 14:32:07 +02:00
ceph init: add dsm gpl source 2024-07-05 18:00:04 +02:00
cifs new helper: inode_wrong_type() 2024-07-05 19:05:18 +02:00
coda
configfs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
cramfs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
crypto fscrypt: add fscrypt_symlink_getattr() for computing st_size 2024-07-05 19:03:24 +02:00
debugfs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
devpts
dlm fs: dlm: fix memory leak when fenced 2021-07-14 16:55:59 +02:00
ecryptfs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
efivarfs efivarfs: revert "fix memory leak in efivarfs_create()" 2020-11-25 16:55:02 +01:00
efs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
erofs erofs: fix error return code in erofs_read_superblock() 2021-07-14 16:56:53 +02:00
exfat init: add dsm gpl source 2024-07-05 18:00:04 +02:00
exportfs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ext2 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
ext4 ext4: report correct st_size for encrypted symlinks 2024-07-05 19:03:30 +02:00
f2fs f2fs: report correct st_size for encrypted symlinks 2024-07-05 19:03:35 +02:00
fat init: add dsm gpl source 2024-07-05 18:00:04 +02:00
freevxfs
fscache
fuse fuse: fix illegal access to inode with reused nodeid 2024-07-05 19:05:18 +02:00
gfs2 gfs2: Fix error handling in init_statfs 2021-07-14 16:55:38 +02:00
hfs hfs: add lock nesting notation to hfs_find_init 2021-07-31 08:16:12 +02:00
hfsplus init: add dsm gpl source 2024-07-05 18:00:04 +02:00
hostfs hostfs: fix memory handling in follow_link() 2021-04-14 08:42:06 +02:00
hpfs [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
hugetlbfs hugetlbfs: fix mount mode command line processing 2021-07-28 14:35:46 +02:00
iomap init: add dsm gpl source 2024-07-05 18:00:04 +02:00
isofs init: add dsm gpl source 2024-07-05 18:00:04 +02:00
jbd2 ext4: fix debug format string warning 2021-05-19 10:13:19 +02:00
jffs2 jffs2: check the validity of dstlen in jffs2_zlib_compress() 2021-05-11 14:47:36 +02:00
jfs fs/jfs: Fix missing error code in lmLogInit() 2021-07-20 16:05:40 +02:00
kernfs kernfs: wire up ->splice_read and ->splice_write 2021-01-27 11:55:29 +01:00
lockd init: add dsm gpl source 2024-07-05 18:00:04 +02:00
minix [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
nfs new helper: inode_wrong_type() 2024-07-05 19:05:18 +02:00
nfs_common nfs_common: need lock during iterate through the list 2020-12-30 11:53:45 +01:00
nfsd new helper: inode_wrong_type() 2024-07-05 19:05:18 +02:00
nilfs2 nilfs2: fix memory leak in nilfs_sysfs_delete_device_group 2021-06-30 08:47:24 -04:00
nls
notify init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ntfs ntfs: fix validity check for file name attribute 2021-07-14 16:55:38 +02:00
ocfs2 ocfs2: issue zeroout to EOF blocks 2024-07-05 18:03:15 +02:00
omfs fs: omfs: use kmemdup() rather than kmalloc+memcpy 2020-09-22 23:39:45 -04:00
openpromfs
orangefs orangefs: fix orangefs df output. 2021-07-20 16:05:48 +02:00
overlayfs new helper: inode_wrong_type() 2024-07-05 19:05:18 +02:00
proc init: add dsm gpl source 2024-07-05 18:00:04 +02:00
pstore init: add dsm gpl source 2024-07-05 18:00:04 +02:00
qnx4 [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
qnx6 [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
quota init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ramfs ramfs: fix nommu mmap with gaps in the page cache 2020-10-16 11:11:22 -07:00
reiserfs reiserfs: check directory items on read from disk 2024-07-05 18:52:32 +02:00
romfs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
squashfs squashfs: fix divide error in calculate_skip() 2021-05-19 10:13:10 +02:00
sysfs sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2020-10-02 12:02:30 +02:00
sysv [PATCH] reduce boilerplate in fsid handling 2020-09-18 16:45:50 -04:00
tracefs
ubifs ubifs: report correct st_size for encrypted symlinks 2024-07-05 19:03:39 +02:00
udf init: add dsm gpl source 2024-07-05 18:00:04 +02:00
ufs Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-10-24 12:26:05 -07:00
unicode unicode: Add utf8_casefold_hash 2020-09-10 14:03:31 -07:00
vboxsf vboxsf: Add support for the atomic_open directory-inode op 2024-07-05 18:54:41 +02:00
verity
xfs xfs: fix return of uninitialized value in variable error 2021-05-14 09:50:34 +02:00
zonefs zonefs: fix to update .i_wr_refcnt correctly in zonefs_open_zone() 2021-03-25 09:04:05 +01:00
aio.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
anon_inodes.c
attr.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot 2020-10-16 11:11:21 -07:00
binfmt_elf.c fs: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
binfmt_em86.c
binfmt_flat.c binfmt_flat: revert "binfmt_flat: don't offset the data start" 2020-08-24 08:49:13 +10:00
binfmt_misc.c binfmt_misc: fix possible deadlock in bm_register_write 2021-03-17 17:06:35 +01:00
binfmt_script.c
block_dev.c block: fix a race between del_gendisk and BLKRRPART 2021-06-03 09:00:45 +02:00
buffer.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
char_dev.c
compat_binfmt_elf.c
coredump.c coredump: fix core_pattern parse error 2020-12-06 10:19:07 -08:00
d_path.c fs: fix NULL dereference due to data race in prepend_path() 2020-10-14 14:54:45 -07:00
dax.c dax: fix ENOMEM handling in grab_mapping_entry() 2021-07-14 16:56:13 +02:00
dcache.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
dcookies.c
direct-io.c fs: direct-io: fix missing sdio->boundary 2021-04-14 08:41:58 +02:00
drop_caches.c
eventfd.c
eventpoll.c fs/epoll: restore waking from ep_done_scan() 2021-05-11 14:47:12 +02:00
exec.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
fcntl.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
fhandle.c
file_table.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
file.c kernel/io_uring: cancel io_uring before task works 2021-01-30 13:55:18 +01:00
filesystems.c
fs_context.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
fs_parser.c fs_parse: mark fs_param_bad_value() as static 2020-10-13 18:38:27 -07:00
fs_pin.c
fs_struct.c vfs: Use sequence counter with associated spinlock 2020-07-29 16:14:27 +02:00
fs_types.c
fs-writeback.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
fsopen.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
init.c init: add an init_dup helper 2020-08-04 21:02:38 -04:00
inode.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
internal.h init: add dsm gpl source 2024-07-05 18:00:04 +02:00
io_uring.c io_uring: only assign io_uring_enter() SQPOLL error in actual error case 2024-07-05 18:56:00 +02:00
io-wq.c io_uring: fix false WARN_ONCE 2021-07-19 09:44:51 +02:00
io-wq.h io_uring: always batch cancel in *cancel_files() 2021-02-13 13:54:56 +01:00
ioctl.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
Kconfig init: add dsm gpl source 2024-07-05 18:00:04 +02:00
Kconfig.binfmt
kernel_read_file.c fs/kernel_file_read: Add "offset" arg for partial reads 2020-10-05 13:37:04 +02:00
libfs.c libfs: fix error cast of negative value in simple_attr_write() 2020-11-22 10:48:22 -08:00
locks.c Revert "nfsd4: a client's own opens needn't prevent delegations" 2021-03-20 10:43:44 +01:00
Makefile init: add dsm gpl source 2024-07-05 18:00:04 +02:00
mbcache.c
mount.h init: add dsm gpl source 2024-07-05 18:00:04 +02:00
mpage.c
namei.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
namespace.c fs: warn about impending deprecation of mandatory locks 2024-07-05 18:56:00 +02:00
no-block.c
nsfs.c
open.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
pipe.c pipe: do FASYNC notifications for every pipe IO, not just state changes 2024-07-05 19:00:51 +02:00
pnode.c
pnode.h mount: fix mounting of detached mounts onto targets that reside on shared mounts 2021-03-17 17:06:13 +01:00
posix_acl.c
proc_namespace.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
read_write.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
readdir.c readdir: make sure to verify directory entry for legacy interfaces too 2021-04-21 13:00:54 +02:00
remap_range.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
select.c kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data() 2021-03-25 09:04:16 +01:00
seq_file.c seq_file: disallow extremely large seq buffer allocations 2021-07-20 16:05:59 +02:00
signalfd.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
splice.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
stack.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
stat.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
statfs.c Add a "nosymfollow" mount option. 2020-08-27 16:06:47 -04:00
super.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
sync.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
syno_acl_api.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
syno_acl.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
syno_acl.h init: add dsm gpl source 2024-07-05 18:00:04 +02:00
timerfd.c
userfaultfd.c userfaultfd: do not untag user pointers 2021-07-28 14:35:46 +02:00
utimes.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00
xattr.c init: add dsm gpl source 2024-07-05 18:00:04 +02:00