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Chao Yu b142409ba0 f2fs: compress: don't allow unaligned truncation on released compress inode 
[ Upstream commit 29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee ]

f2fs image may be corrupted after below testcase:
- mkfs.f2fs -O extra_attr,compression -f /dev/vdb
- mount /dev/vdb /mnt/f2fs
- touch /mnt/f2fs/file
- f2fs_io setflags compression /mnt/f2fs/file
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4
- f2fs_io release_cblocks /mnt/f2fs/file
- truncate -s 8192 /mnt/f2fs/file
- umount /mnt/f2fs
- fsck.f2fs /dev/vdb

[ASSERT] (fsck_chk_inode_blk:1256)  --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks
[FSCK] valid_block_count matching with CP             [Fail] [0x4, 0x5]
[FSCK] other corrupted bugs                           [Fail]

The reason is: partial truncation assume compressed inode has reserved
blocks, after partial truncation, valid block count may change w/o
.i_blocks and .total_valid_block_count update, result in corruption.

This patch only allow cluster size aligned truncation on released
compress inode for fixing.

Fixes: c61404153eb6 ("f2fs: introduce FI_COMPRESS_RELEASED instead of using IMMUTABLE bit")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-19 12:27:05 +01:00
..
acl.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
acl.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
checkpoint.c f2fs: use copy_page for full page copy 2024-11-17 17:41:42 +01:00
compress.c f2fs: compress: remove unneeded preallocation 2024-11-19 12:27:02 +01:00
data.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dir.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
extent_cache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
f2fs.h f2fs: use copy_page for full page copy 2024-11-17 17:41:42 +01:00
file.c f2fs: compress: don't allow unaligned truncation on released compress inode 2024-11-19 12:27:05 +01:00
gc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gc.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hash.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
inline.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
inode.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig f2fs: Add support for reporting a fake kernel version to fsck 2024-11-17 17:43:26 +01:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
namei.c f2fs: fix to avoid dirent corruption 2024-11-18 12:12:39 +01:00
node.c f2fs: fix to release node block count in error path of f2fs_new_node_page() 2024-11-19 12:27:05 +01:00
node.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
recovery.c f2fs: fix write pointers on zoned device after roll forward 2024-11-18 12:13:17 +01:00
segment.c f2fs: use copy_page for full page copy 2024-11-17 17:41:42 +01:00
segment.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shrinker.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
super.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sysfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
verity.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xattr.c f2fs: explicitly null-terminate the xattr list 2024-11-18 12:12:11 +01:00
xattr.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00