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linux-yocto/fs
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wangzijie e0a9a737c9 f2fs: fix zero-sized extent for precache extents 
[ Upstream commit 8175c864391753b210f3dcfae1aeed686a226ebb ]

Script to reproduce:
f2fs_io write 1 0 1881 rand dsync testfile
f2fs_io fallocate 0 7708672 4096 testfile
f2fs_io write 1 1881 1 rand buffered testfile
fsync testfile
umount
mount
f2fs_io precache_extents testfile

When the data layout is something like this:
dnode1:                     dnode2:
[0]      A                  [0]    NEW_ADDR
[1]      A+1                [1]    0x0
...
[1016]   A+1016
[1017]   B (B!=A+1017)      [1017] 0x0

During precache_extents, we map the last block(valid blkaddr) in dnode1:
map->m_flags |= F2FS_MAP_MAPPED;
map->m_pblk = blkaddr(valid blkaddr);
map->m_len = 1;
then we goto next_dnode, meet the first block in dnode2(hole), goto sync_out:
map->m_flags & F2FS_MAP_MAPPED == true, and we make zero-sized extent:

map->m_len = 1
ofs = start_pgofs - map->m_lblk = 1882 - 1881 = 1
ei.fofs = start_pgofs = 1882
ei.len = map->m_len - ofs = 1 - 1 = 0

Rebased on patch[1], this patch can cover these cases to avoid zero-sized extent:
A,B,C is valid blkaddr
case1:
dnode1:                     dnode2:
[0]      A                  [0]    NEW_ADDR
[1]      A+1                [1]    0x0
...                         ....
[1016]   A+1016
[1017]   B (B!=A+1017)      [1017] 0x0

case2:
dnode1:                     dnode2:
[0]      A                  [0]    C (C!=B+1)
[1]      A+1                [1]    C+1
...                         ....
[1016]   A+1016
[1017]   B (B!=A+1017)      [1017] 0x0

case3:
dnode1:                     dnode2:
[0]      A                  [0]    C (C!=B+2)
[1]      A+1                [1]    C+1
...                         ....
[1015]   A+1015
[1016]   B (B!=A+1016)
[1017]   B+1                [1017] 0x0

[1] https://lore.kernel.org/linux-f2fs-devel/20250912081250.44383-1-chao@kernel.org/

Fixes: c4020b2da4 ("f2fs: support F2FS_IOC_PRECACHE_EXTENTS")
Signed-off-by: wangzijie <wangzijie1@honor.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-10-15 11:58:02 +02:00
..
9p fs/9p: fix uninitialized values during inode evict 2024-11-22 15:38:37 +01:00
adfs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
affs affs: don't write overlarge OFS data block size fields 2025-04-10 14:37:37 +02:00
afs afs: Fix potential null pointer dereference in afs_put_server 2025-10-02 13:42:53 +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: ref-verify: handle damaged extent root tree 2025-10-12 12:56:21 +02:00
cachefiles cachefiles: Fix the incorrect return value in __cachefiles_write() 2025-07-24 08:53:16 +02:00
ceph ceph: fix possible integer overflow in ceph_zero_objects() 2025-07-06 11:00:08 +02:00
coda v6.6-vfs.ctime 2023-08-28 09:31:32 -07:00
configfs configfs: Do not override creating attribute file failure in populate_attrs() 2025-06-27 11:08:42 +01:00
cramfs fs: Convert to bdev_open_by_dev() 2024-08-19 06:04:25 +02:00
crypto fscrypt: Don't use problematic non-inline crypto engines 2025-08-28 16:28:40 +02:00
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: make tcp still work in multi-link env 2025-06-04 14:41:57 +02:00
ecryptfs fs: Create a generic is_dot_dotdot() utility 2024-10-04 16:29:48 +02:00
efivarfs efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare 2025-09-04 15:30:26 +02:00
efs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
erofs erofs: fix atomic context detection when !CONFIG_DEBUG_LOCK_ALLOC 2025-09-04 15:30:19 +02:00
exfat exfat: add cluster chain loop check for dir 2025-08-28 16:28:28 +02:00
exportfs exportfs: remove kernel-doc warnings in exportfs 2023-08-29 17:45:22 -04:00
ext2 ext2: Handle fiemap on empty files to prevent EINVAL 2025-08-28 16:28:15 +02:00
ext4 ext4: preserve SB_I_VERSION on remount 2025-08-28 16:28:44 +02:00
f2fs f2fs: fix zero-sized extent for precache extents 2025-10-15 11:58:02 +02:00
fat fat: fix uninitialized variable 2024-10-22 15:46:20 +02:00
freevxfs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
fscache netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING 2024-12-09 10:31:45 +01:00
fuse fuse: prevent overflow in copy_file_range return value 2025-09-19 16:32:04 +02:00
gfs2 gfs2: Fix GLF_INVALIDATE_IN_PROGRESS flag clearing in do_xmote 2025-10-15 11:57:48 +02:00
hfs hfs: fix not erasing deleted b-tree node issue 2025-08-28 16:28:15 +02:00
hfsplus hfsplus: don't use BUG_ON() in hfsplus_create_attributes_file() 2025-08-28 16:28:14 +02:00
hostfs um: hostfs: avoid issues on inode number reuse by host 2025-04-10 14:37:34 +02:00
hpfs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
hugetlbfs mm/hugetlb: fix folio is still mapped when deleted 2025-10-02 13:42:54 +02:00
iomap iomap: skip unnecessary ifs_block_is_uptodate check 2025-05-02 07:51:01 +02:00
isofs isofs: Verify inode mode when loading from disk 2025-07-24 08:53:13 +02:00
jbd2 jbd2: prevent softlockup in jbd2_log_do_checkpoint() 2025-08-28 16:28:36 +02:00
jffs2 jffs2: check jffs2_prealloc_raw_node_refs() result in few other places 2025-06-27 11:08:58 +01:00
jfs jfs: upper bound check of tree index in dbAllocAG 2025-08-28 16:28:26 +02:00
kernfs kernfs: Fix UAF in polling when open file is released 2025-09-19 16:32:05 +02:00
lockd nfsd: stop setting ->pg_stats for unused stats 2024-08-19 06:04:23 +02:00
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 NFSv4/flexfiles: Fix layout merge mirror check. 2025-09-19 16:32:02 +02:00
nfs_common
nfsd NFSD: nfsd_unlink() clobbers non-zero status returned from fh_fill_pre_attrs() 2025-09-19 16:32:01 +02:00
nilfs2 nilfs2: fix CFI failure when accessing /sys/fs/nilfs2/features/* 2025-09-25 11:00:07 +02:00
nls nls: Hide new NLS_UCS2_UTILS 2023-08-31 12:07:34 -05:00
notify fanotify: sanitize handle_type values when reporting fid 2025-08-15 12:08:52 +02:00
ntfs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
ntfs3 fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist 2025-10-15 11:58:00 +02:00
ocfs2 ocfs2: fix recursive semaphore deadlock in fiemap call 2025-09-19 16:32:03 +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 fs/orangefs: use snprintf() instead of sprintf() 2025-08-28 16:28:25 +02:00
overlayfs ovl: Check for NULL d_inode() in ovl_dentry_upper() 2025-07-06 11:00:08 +02:00
proc proc: fix type confusion in pde_set_flags() 2025-09-19 16:32:02 +02:00
pstore pstore: Change kmsg_bytes storage size to u32 2025-06-04 14:42:11 +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: flush quota_release_work upon quota writeback 2024-12-09 10:33:01 +01:00
ramfs ramfs: convert to ctime accessor functions 2023-07-24 10:30:04 +02:00
reiserfs reiserfs: fix uninit-value in comp_keys 2024-08-19 06:04:26 +02:00
romfs fs: Convert to bdev_open_by_dev() 2024-08-19 06:04:25 +02:00
smb smb: server: fix IRD/ORD negotiation with the client 2025-10-15 11:57:49 +02:00
squashfs squashfs: fix memory leak in squashfs_fill_super 2025-08-28 16:28:43 +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 tracefs: Add d_delete to remove negative dentries 2025-08-28 16:28:15 +02:00
ubifs ubifs: skip dumping tnc tree when zroot is null 2025-02-08 09:52:28 +01:00
udf udf: Verify partition map count 2025-08-28 16:28:15 +02:00
ufs for-6.6/block-2023-08-28 2023-08-29 20:21:42 -07:00
unicode Revert "unicode: Don't special case ignorable code points" 2024-12-14 20:00:20 +01:00
vboxsf vboxsf: fix building with GCC 15 2025-03-22 12:50:41 -07:00
verity fsverity: use register_sysctl_init() to avoid kmemleak warning 2024-06-16 13:47:33 +02:00
xfs xfs: do not propagate ENODATA disk errors into xattr code 2025-09-04 15:30:29 +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 fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass 2025-07-10 16:03:18 +02:00
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: don't use missing interpreter's properties 2024-08-29 17:33:33 +02:00
binfmt_elf_test.c
binfmt_elf.c binfmt_elf: Move brk for static PIE even if ASLR disabled 2025-05-22 14:12:12 +02:00
binfmt_flat.c binfmt_flat: Fix integer overflow bug on 32 bit systems 2025-02-17 09:40:16 +01:00
binfmt_misc.c binfmt_misc: cleanup on filesystem umount 2024-08-29 17:33:27 +02:00
binfmt_script.c
buffer.c fs/buffer: fix use-after-free when call bh_read() helper 2025-08-28 16:28:44 +02:00
char_dev.c
compat_binfmt_elf.c
coredump.c coredump: hand a pidfd to the usermode coredump helper 2025-06-04 14:42:24 +02:00
d_path.c
dax.c fsdax: dax_unshare_iter needs to copy entire blocks 2024-11-08 16:28:19 +01:00
dcache.c fs: better handle deep ancestor chains in is_subdir() 2024-07-25 09:50:54 +02:00
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 eventpoll: Fix semi-unbounded recursion 2025-08-28 16:28:12 +02:00
exec.c exec: fix the racy usage of fs_struct->in_exec 2025-04-10 14:37:44 +02:00
fcntl.c fs: Fix file_set_fowner LSM hook inconsistencies 2024-10-04 16:29:56 +02:00
fhandle.c fs: Annotate struct file_handle with __counted_by() and use struct_size() 2024-08-19 06:04:28 +02:00
file_table.c fs: fix proc_handler for sysctl_nr_open 2025-02-08 09:51:42 +01:00
file.c alloc_fdtable(): change calling conventions. 2025-08-28 16:28:50 +02:00
filesystems.c fs/filesystems: Fix potential unsigned integer underflow in fs_name() 2025-06-19 15:28:43 +02:00
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 fs: writeback: fix use-after-free in __mark_inode_dirty() 2025-09-09 18:56:20 +02:00
fsopen.c fs: add FSCONFIG_CMD_CREATE_EXCL 2023-08-14 18:48:02 +02:00
init.c
inode.c fs/inode: Prevent dump_mapping() accessing invalid dentry.d_name.name 2024-12-09 10:31:41 +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 nfs: add missing selections of CONFIG_CRC32 2025-04-25 10:45:46 +02:00
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 better lockdep annotations for simple_recursive_removal() 2025-08-28 16:28:15 +02:00
locks.c filelock: Fix fcntl/close race recovery compat path 2024-07-27 11:34:10 +02:00
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 fuse: don't truncate cached, mutated symlink 2025-03-22 12:50:44 -07:00
namespace.c use uniform permission checks for all mount propagation changes 2025-08-28 16:28:44 +02:00
nsfs.c fs: convert to ctime accessor functions 2023-07-13 10:28:04 +02:00
open.c openat2: explicitly return -E2BIG for (usize > PAGE_SIZE) 2024-11-01 01:58:32 +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 hrtimer: Use and report correct timerslack values for realtime tasks 2025-03-22 12:50:37 -07:00
seq_file.c
signalfd.c
splice.c splice: remove duplicate noinline from pipe_clear_nowait 2025-05-02 07:50:45 +02:00
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: Convert to bdev_open_by_dev() 2024-08-19 06:04:25 +02:00
sync.c
sysctls.c
timerfd.c
userfaultfd.c mm/userfaultfd: fix release hang over concurrent GUP 2025-04-25 10:45:31 +02:00
utimes.c
xattr.c fs/xattr.c: fix simple_xattr_list() 2025-06-27 11:08:57 +01:00