linux/fs/nilfs2
Ryusuke Konishi 93aef9eda1 nilfs2: fix incorrect inode allocation from reserved inodes
If the bitmap block that manages the inode allocation status is corrupted,
nilfs_ifile_create_inode() may allocate a new inode from the reserved
inode area where it should not be allocated.

Previous fix commit d325dc6eb7 ("nilfs2: fix use-after-free bug of
struct nilfs_root"), fixed the problem that reserved inodes with inode
numbers less than NILFS_USER_INO (=11) were incorrectly reallocated due to
bitmap corruption, but since the start number of non-reserved inodes is
read from the super block and may change, in which case inode allocation
may occur from the extended reserved inode area.

If that happens, access to that inode will cause an IO error, causing the
file system to degrade to an error state.

Fix this potential issue by adding a wraparound option to the common
metadata object allocation routine and by modifying
nilfs_ifile_create_inode() to disable the option so that it only allocates
inodes with inode numbers greater than or equal to the inode number read
in "nilfs->ns_first_ino", regardless of the bitmap status of reserved
inodes.

Link: https://lkml.kernel.org/r/20240623051135.4180-4-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-07-03 12:29:25 -07:00
..
alloc.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 12:29:25 -07:00
alloc.h nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 12:29:25 -07:00
bmap.c nilfs2: do not acquire rwsem in nilfs_bmap_write() 2024-02-22 15:38:53 -08:00
bmap.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
btnode.c nilfs2: convert nilfs_page_bug() to nilfs_folio_bug() 2023-12-10 17:21:48 -08:00
btnode.h fs/nilfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:33 -06:00
btree.c nilfs2: add kernel-doc comments to nilfs_btree_convert_and_insert() 2024-04-25 21:07:08 -07:00
btree.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
cpfile.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
cpfile.h nilfs2: remove nilfs_cpfile_{get,put}_checkpoint() 2024-02-22 15:38:53 -08:00
dat.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 12:29:25 -07:00
dat.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
dir.c nilfs2: add missing check for inode numbers on directory entries 2024-07-03 12:29:24 -07:00
direct.c nilfs2: fix failure to detect DAT corruption in btree and direct mappings 2024-03-14 09:17:29 -07:00
direct.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
export.h
file.c nilfs2: fix hang in nilfs_lookup_dirty_data_buffers() 2024-02-07 21:20:36 -08:00
gcinode.c nilfs2: add kernel-doc comments to nilfs_remove_all_gcinodes() 2024-04-25 21:07:08 -07:00
ifile.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 12:29:25 -07:00
ifile.h nilfs2: localize highmem mapping for checkpoint reading within cpfile 2024-02-22 15:38:53 -08:00
inode.c nilfs2: prevent kernel bug at submit_bh_wbc() 2024-03-14 09:17:30 -07:00
ioctl.c nilfs2: fix out-of-range warning 2024-04-09 10:52:12 +02:00
Kconfig fs: add CONFIG_BUFFER_HEAD 2023-08-02 09:13:09 -06:00
Makefile
mdt.c nilfs2: convert metadata file common code to use kmap_local 2024-02-22 15:38:53 -08:00
mdt.h nilfs2: fix lockdep warnings during disk space reclamation 2022-04-01 11:46:09 -07:00
namei.c misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
nilfs.h nilfs2: add missing check for inode numbers on directory entries 2024-07-03 12:29:24 -07:00
page.c nilfs2: convert nilfs_copy_buffer() to use kmap_local 2024-02-22 15:38:53 -08:00
page.h nilfs2: convert nilfs_page_bug() to nilfs_folio_bug() 2023-12-10 17:21:48 -08:00
recovery.c nilfs2: make block erasure safe in nilfs_finish_roll_forward() 2024-05-19 14:36:21 -07:00
segbuf.c nilfs2: convert segment buffer to use kmap_local 2024-02-22 15:38:53 -08:00
segbuf.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
segment.c nilfs2: fix potential kernel bug due to lack of writeback flag waiting 2024-06-05 19:19:24 -07:00
segment.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
sufile.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
sufile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
super.c nilfs2: convert to use the new mount API 2024-05-08 08:41:27 -07:00
sysfs.c nilfs2: use default_groups in kobj_type 2021-12-29 10:53:48 +01:00
sysfs.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
the_nilfs.c nilfs2: fix inode number range checks 2024-07-03 12:29:24 -07:00
the_nilfs.h nilfs2: fix inode number range checks 2024-07-03 12:29:24 -07:00