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David Howells 8a73c08e00 cachefiles, erofs: Fix NULL deref in when cachefiles is not doing ondemand-mode 
commit c3d6569a43322f371e7ba0ad386112723757ac8f upstream.

cachefiles_ondemand_init_object() as called from cachefiles_open_file() and
cachefiles_create_tmpfile() does not check if object->ondemand is set
before dereferencing it, leading to an oops something like:

	RIP: 0010:cachefiles_ondemand_init_object+0x9/0x41
	...
	Call Trace:
	 <TASK>
	 cachefiles_open_file+0xc9/0x187
	 cachefiles_lookup_cookie+0x122/0x2be
	 fscache_cookie_state_machine+0xbe/0x32b
	 fscache_cookie_worker+0x1f/0x2d
	 process_one_work+0x136/0x208
	 process_scheduled_works+0x3a/0x41
	 worker_thread+0x1a2/0x1f6
	 kthread+0xca/0xd2
	 ret_from_fork+0x21/0x33

Fix this by making cachefiles_ondemand_init_object() return immediately if
cachefiles->ondemand is NULL.

Fixes: 3c5ecfe16e76 ("cachefiles: extract ondemand info field from cachefiles_object")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Gao Xiang <xiang@kernel.org>
cc: Chao Yu <chao@kernel.org>
cc: Yue Hu <huyue2@coolpad.com>
cc: Jeffle Xu <jefflexu@linux.alibaba.com>
cc: linux-erofs@lists.ozlabs.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-06-21 14:38:47 +02:00
..
9p
9p: add missing locking around taking dentry fid list
2024-06-16 13:47:37 +02:00
adfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
affs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
afs
afs: Don't cross .backup mountpoint from backup volume
2024-06-16 13:47:30 +02:00
autofs
v6.6-vfs.autofs
2023-08-28 11:39:14 -07:00
befs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
bfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
btrfs
btrfs: zoned: fix use-after-free due to race with dev replace
2024-06-21 14:38:44 +02:00
cachefiles
cachefiles, erofs: Fix NULL deref in when cachefiles is not doing ondemand-mode
2024-06-21 14:38:47 +02:00
ceph
ceph: redirty page before returning AOP_WRITEPAGE_ACTIVATE
2024-04-27 17:11:29 +02:00
coda
v6.6-vfs.ctime
2023-08-28 09:31:32 -07:00
configfs
configfs: convert to ctime accessor functions
2023-07-13 10:28:05 +02:00
cramfs
v6.6-vfs.super
2023-08-28 11:04:18 -07:00
crypto
…
debugfs
debugfs: fix automount d_fsdata usage
2024-01-20 11:51:37 +01:00
devpts
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
dlm
dlm: fix user space lock decision to copy lvb
2024-06-12 11:11:38 +02:00
ecryptfs
ecryptfs: Fix buffer size for tag 66 packet
2024-06-12 11:11:31 +02:00
efivarfs
efivarfs: Request at most 512 bytes for variable names
2024-03-06 14:48:41 +00:00
efs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
erofs
erofs: avoid allocating DEFLATE streams before mounting
2024-06-16 13:47:31 +02:00
exfat
exfat: support handle zero-size directory
2023-11-28 17:19:44 +00:00
exportfs
exportfs: remove kernel-doc warnings in exportfs
2023-08-29 17:45:22 -04:00
ext2
quota: Properly annotate i_dquot arrays with __rcu
2024-03-26 18:19:46 -04:00
ext4
ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()
2024-06-16 13:47:45 +02:00
f2fs
f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()
2024-06-16 13:47:32 +02:00
fat
fat: fix uninitialized field in nostale filehandles
2024-04-03 15:28:20 +02:00
freevxfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
fscache
netfs, fscache: Prevent Oops in fscache_put_cache()
2024-01-31 16:19:01 -08:00
fuse
fuse: fix leaked ENOSYS error on first statx call
2024-04-27 17:11:42 +02:00
gfs2
kthread: add kthread_stop_put
2024-06-12 11:12:52 +02:00
hfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hfsplus
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hostfs
hostfs: convert to ctime accessor functions
2023-07-24 10:30:00 +02:00
hpfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
hugetlbfs
mm: hugetlb pages should not be reserved by shmat() if SHM_NORESERVE
2024-02-23 09:25:16 +01:00
iomap
iomap: fault in smaller chunks for non-large folio mappings
2024-06-16 13:47:40 +02:00
isofs
isofs: handle CDs with bad root inode but good Joliet root directory
2024-04-13 13:07:34 +02:00
jbd2
jbd2: fix soft lockup in journal_finish_inode_data_buffers()
2024-01-20 11:51:43 +01:00
jffs2
jffs2: prevent xattr node from overflowing the eraseblock
2024-06-12 11:11:33 +02:00
jfs
jfs: xattr: fix buffer overflow for invalid xattr
2024-06-21 14:38:24 +02:00
kernfs
kernfs: RCU protect kernfs_nodes and avoid kernfs_idr_lock in kernfs_find_and_get_node_by_id()
2024-04-13 13:07:38 +02:00
lockd
SUNRPC: Add enum svc_auth_status
2023-08-29 17:45:22 -04:00
minix
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
netfs
netfs: Only call folio_start_fscache() one time for each folio
2023-09-18 12:03:46 -07:00
nfs
NFS: add barriers when testing for NFS_FSDATA_BLOCKED
2024-06-21 14:38:29 +02:00
nfs_common
…
nfsd
knfsd: LOOKUP can return an illegal error value
2024-06-21 14:38:40 +02:00
nilfs2
nilfs2: fix potential kernel bug due to lack of writeback flag waiting
2024-06-21 14:38:46 +02:00
nls
nls: Hide new NLS_UCS2_UTILS
2023-08-31 12:07:34 -05:00
notify
fanotify: limit reporting of event with non-decodeable file handles
2023-10-19 16:19:20 +02:00
ntfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
ntfs3
fs/ntfs3: Use variable length array instead of fixed size
2024-06-12 11:12:39 +02:00
ocfs2
ocfs2: fix races between hole punching and AIO+DIO
2024-06-21 14:38:41 +02:00
omfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
openpromfs
openpromfs: finish conversion to the new mount API
2024-06-12 11:11:30 +02:00
orangefs
Julia Lawall reported this null pointer dereference, this should fix it.
2024-04-13 13:07:35 +02:00
overlayfs
ovl: remove upper umask handling from ovl_create_upper()
2024-06-12 11:12:24 +02:00
proc
fs/proc: fix softlockup in __read_vmcore
2024-06-21 14:38:41 +02:00
pstore
pstore/zone: Add a null pointer check to the psz_kmsg_read
2024-04-13 13:07:31 +02:00
qnx4
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
qnx6
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
quota
quota: Properly annotate i_dquot arrays with __rcu
2024-03-26 18:19:46 -04:00
ramfs
ramfs: convert to ctime accessor functions
2023-07-24 10:30:04 +02:00
reiserfs
quota: Properly annotate i_dquot arrays with __rcu
2024-03-26 18:19:46 -04:00
romfs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
smb
ksmbd: fix missing use of get_write in in smb2_set_ea()
2024-06-21 14:38:36 +02:00
squashfs
Squashfs: check the inode number is not the invalid value of zero
2024-05-02 16:32:41 +02:00
sysfs
fs: sysfs: Fix reference leak in sysfs_break_active_protection()
2024-04-27 17:11:41 +02:00
sysv
sysv: don't call sb_bread() with pointers_lock held
2024-04-13 13:07:34 +02:00
tracefs
eventfs: Update all the eventfs_inodes from the events descriptor
2024-06-21 14:38:22 +02:00
ubifs
ubifs: Set page uptodate in the correct place
2024-04-03 15:28:20 +02:00
udf
udf: Convert udf_expand_file_adinicb() to use a folio
2024-06-12 11:12:23 +02:00
ufs
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
unicode
…
vboxsf
vboxsf: explicitly deny setlease attempts
2024-05-17 12:02:13 +02:00
verity
fsverity: use register_sysctl_init() to avoid kmemleak warning
2024-06-16 13:47:33 +02:00
xfs
xfs: allow cross-linking special files without project quota
2024-06-21 14:38:45 +02:00
zonefs
zonefs: Improve error handling
2024-02-23 09:25:13 +01:00
aio.c
fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion
2024-04-03 15:28:44 +02:00
anon_inodes.c
…
attr.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
bad_inode.c
fs: drop the timespec64 argument from update_time
2023-08-11 09:04:57 +02:00
binfmt_elf_fdpic.c
fs: binfmt_elf_efpic: fix personality for ELF-FDPIC
2023-09-29 17:20:45 -07:00
binfmt_elf_test.c
…
binfmt_elf.c
Merge branch 'expand-stack'
2023-06-28 20:35:21 -07:00
binfmt_flat.c
…
binfmt_misc.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
binfmt_script.c
…
buffer.c
iomap: add a workaround for racy i_size updates on block devices
2023-09-25 08:55:00 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
coredump.c
…
d_path.c
…
dax.c
mm: convert DAX lock/unlock page to lock/unlock folio
2024-01-10 17:16:53 +01:00
dcache.c
fast_dput(): handle underflows gracefully
2024-02-05 20:14:26 +00:00
direct-io.c
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -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
epoll: be better about file lifetimes
2024-06-12 11:11:30 +02:00
exec.c
exec: Fix NOMMU linux_binprm::exec in transfer_args_to_stack()
2024-04-03 15:28:55 +02:00
fcntl.c
fs: Fix rw_hint validation
2024-03-26 18:19:17 -04:00
fhandle.c
do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
2024-03-26 18:19:15 -04:00
file_table.c
fs: use __fput_sync in close(2)
2023-08-08 19:36:51 +02:00
file.c
v6.6-vfs.misc
2023-08-28 10:17:14 -07:00
filesystems.c
…
fs_context.c
fs: factor out vfs_parse_monolithic_sep() helper
2023-10-12 18:53:36 +03:00
fs_parser.c
…
fs_pin.c
…
fs_struct.c
kill do_each_thread()
2023-08-21 13:46:25 -07:00
fs_types.c
…
fs-writeback.c
writeback, cgroup: switch inodes with dirty timestamps to release dying cgwbs
2023-11-20 11:58:52 +01:00
fsopen.c
fs: add FSCONFIG_CMD_CREATE_EXCL
2023-08-14 18:48:02 +02:00
init.c
…
inode.c
filemap: add a per-mapping stable writes flag
2023-12-03 07:33:03 +01:00
internal.h
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
ioctl.c
lsm: new security_file_ioctl_compat() hook
2024-01-31 16:18:54 -08:00
Kconfig
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
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
fs: new accessor methods for atime and mtime
2024-01-05 15:19:40 +01:00
locks.c
NFSD 6.6 Release Notes
2023-08-31 15:32:18 -07:00
Makefile
fs: add CONFIG_BUFFER_HEAD
2023-08-02 09:13:09 -06:00
mbcache.c
…
mnt_idmapping.c
…
mount.h
…
mpage.c
…
namei.c
rename(): fix the locking of subdirectories
2024-01-31 16:18:57 -08:00
namespace.c
fs: relax mount_setattr() permission checks
2024-02-23 09:25:15 +01:00
nsfs.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
open.c
cred: get rid of CONFIG_DEBUG_CREDENTIALS
2023-12-20 17:01:51 +01:00
pipe.c
fs/pipe: Fix lockdep false-positive in watchqueue pipe_write()
2024-04-10 16:35:57 +02:00
pnode.c
…
pnode.h
…
posix_acl.c
fs: convert to ctime accessor functions
2023-07-13 10:28:04 +02:00
proc_namespace.c
…
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
…
select.c
fs/select: rework stack allocation hack for clang
2024-03-26 18:19:17 -04:00
seq_file.c
…
signalfd.c
…
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 to ctime accessor functions
2023-07-13 10:28:04 +02:00
stat.c
fs: Pass AT_GETATTR_NOSEC flag to getattr interface function
2023-12-03 07:33:03 +01:00
statfs.c
…
super.c
fs: export sget_dev()
2023-08-31 12:47:15 +02:00
sync.c
…
sysctls.c
…
timerfd.c
…
userfaultfd.c
mm/userfaultfd: reset ptes when close() for wr-protected ones
2024-05-17 12:02:36 +02:00
utimes.c
…
xattr.c
tmpfs,xattr: GFP_KERNEL_ACCOUNT for simple xattrs
2023-08-22 10:57:46 +02:00