ChangeLog

nilfs2-kmod8-1.24  Mon Dec 23, 2024 JST

	* backport fixes for potential issues such as out-of-page memory access
	  and link counter underflow that can occur on corrupted file systems:
	  - nilfs2: prevent use of deleted inode
	  - nilfs2: fix potential out-of-bounds memory access in
	    nilfs_find_entry()

nilfs2-kmod8-1.23  Thu Nov 14, 2024 JST

	* backport fixes for null pointer dereference bugs that occur when
	  using nilfs2 and two block-related tracepoints:
	  - nilfs2: fix null-ptr-deref in block_touch_buffer tracepoint
	  - nilfs2: fix null-ptr-deref in block_dirty_buffer tracepoint

nilfs2-kmod8-1.22  Mon Nov 4, 2024 JST

	* backport fixes for two kernel bug that could occur when file system
	  corruption was detected and the mount mode was degraded to read-only:
	  - nilfs2: fix kernel bug due to missing clearing of buffer delay flag
	  - nilfs2: fix kernel bug due to missing clearing of checked flag

	* backport a fix for a potential deadlock issue:
	  - nilfs2: fix potential deadlock with newly created symlinks

nilfs2-kmod8-1.21  Sat Oct 19, 2024 JST

	* backport an upstream fix for a problem where a directory search could
	  loop for a long time on a broken filesystem, which could result in a
	  large amount of error logs being output in bursts:
	  - nilfs2: propagate directory read errors from nilfs_find_entry()

nilfs2-kmod8-1.20  Mon Sep 23, 2024 JST

	* backport upstream fixes that prevent internal code -ENOENT from
	  propagating to system calls:
	  - nilfs2: treat missing sufile header block as metadata corruption
	  - nilfs2: treat missing cpfile header block as metadata corruption
	  - nilfs2: do not propagate ENOENT error from sufile during recovery
	  - nilfs2: do not propagate ENOENT error from sufile during GC
	  - nilfs2: do not propagate ENOENT error from
	    nilfs_sufile_mark_dirty()

	* backport upstream fixes for three potential issues with empty b-tree
	  nodes that can occur with corrupted file system images, including one
	  recently discovered by syzbot:
	  - nilfs2: fix potential null-ptr-deref in nilfs_btree_insert()
	  - nilfs2: determine empty node blocks as corrupted
	  - nilfs2: fix potential oob read in nilfs_btree_check_delete()

	* backport a change to suppress nuisance kernel warnings that are
	  output after detecting file system corruption and degrading to a
	  read-only mount:
	  - nilfs2: do not output warnings when clearing dirty buffers

	* backport a cleanup patch to remove code that is no longer needed by
	  an existing fix:
	  - nilfs2: do not repair reserved inode bitmap in nilfs_new_inode()

nilfs2-kmod8-1.19  Thu Sep 5, 2024 JST

	* backport upstream bug fixes for issues such as memory access
	  violations or invalid pointer dereferencing due to missing exclusive
	  controls in the sysfs interface, a use-after-free bug in an error
	  path of recovery during mount, and hangs and metadata block loss
	  due to insufficient cleanup after log writer errors:
	  - nilfs2: fix state management in error path of log writing function
	  - nilfs2: fix missing cleanup on rollforward recovery error
	  - nilfs2: protect references to superblock parameters exposed in
	    sysfs
	* backport bug fixes for a kernel bug in b-tree node block creation
	  that can occur when the disk address translation table is corrupted,
	  and potential synchronization operation malfunctions due to an
	  environment-dependent flaw in a sequence counter comparision macro:
	  - nilfs2: handle inconsistent state in nilfs_btnode_create_block()
	  - nilfs2: avoid undefined behavior in nilfs_cnt32_ge macro
	* backport a cleanup patch to resolve a conflict:
	  - fs/nilfs2: remove some unused macros to tame gcc

nilfs2-kmod8-1.18  Fri Jul 12, 2024 JST

	* backport a fix for a kernel bug that could occur when moving/renaming
	  broken directories, and a commit that it depends on:
	  - nilfs2: fix kernel bug on rename operation of broken directory
	  - nilfs2: return the mapped address from nilfs_get_page()

nilfs2-kmod8-1.17  Sat Jul 6, 2024 JST

	* backport a fix for use-after-free of metadata file inodes that could
	  cause kernel bugs when directory entries were corrupted:
	  - nilfs2: add missing check for inode numbers on directory entries
	* backport fixes for a couple of flaws that could cause problems if
	  the starting number of non-reserved inodes was intentionally (or
	  corruptly) changed from its default value:
	  - nilfs2: fix inode number range checks
	  - nilfs2: fix incorrect inode allocation from reserved inodes

nilfs2-kmod8-1.16  Sat Jun 8, 2024 JST

	* backport fixes for a kernel bug that could occur when overwriting
	  a block device on which nilfs2 is mounted, and for potential FS
	  corruption when removing or renaming a directory failed with I/O
	  errors:
	  - nilfs2: fix potential kernel bug due to lack of writeback flag
	    waiting
	  - nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O
	    errors
	* CentOS 8 stream EOL has been reflected in the README file:
	  - README: remove CentOS 8 stream from supported distributions

nilfs2-kmod8-1.15  Mon May 27, 2024 JST

	* backport fixes for a few issues with the log writer, including
	  potential use-after-free and hang issues on unmount, and potential
	  sync operation freezes:
	  - nilfs2: fix use-after-free of timer for log writer thread
	  - nilfs2: fix unexpected freezing of nilfs_segctor_sync()
	  - nilfs2: fix potential hang in nilfs_detach_log_writer()
	* backport fixes for potential issues with finishing block writes in
	  rollforward recovery on mount:
	  - nilfs2: make block erasure safe in nilfs_finish_roll_forward()
	  - nilfs2: convert BUG_ON() in nilfs_finish_roll_forward() to
	    WARN_ON()
	* backport a fix for one potential array out-of-bounds access issue
	  around the directory code:
	  - nilfs2: fix OOB in nilfs_set_de_type
	* backport one environment-dependent build warning fix:
	  - nilfs2: fix out-of-range warning

nilfs2-kmod8-1.14  Sat Mar 16, 2024 JST

	* backport fixes for potential issues that could cause a buffer I/O
	  routine to trigger a kernel bug due to writes to file systems whose
	  DAT metadata is corrupted or unexpected write races:
	  - nilfs2: fix failure to detect DAT corruption in btree and direct
	    mappings
	  - nilfs2: prevent kernel bug at submit_bh_wbc()

nilfs2-kmod8-1.13  Sun Feb 11, 2024 JST

	* backport fixes for a data corruption issue, mmap-related hangs and
	  recovery failures, potential kernel panics, and a log writer freeze
	  handling issue:
	  - nilfs2: fix hang in nilfs_lookup_dirty_data_buffers()
	  - nilfs2: fix data corruption in dsync block recovery for small
	    block sizes
	  - nilfs2: fix potential bug in end_buffer_async_write
	  - nilfs2: add missing set_freezable() for freezable kthread
	* backport a patch that replaces potentially problematic state
	  inconsistency checks with warning message output:
	  - nilfs2: switch WARN_ONs to warning output in nilfs_sufile_do_free()

nilfs2-kmod8-1.12  Sat Dec 9, 2023 JST

	* backport fixes for a potential use-after-free issue, problems
	  including memory access violations due to lack of block size error
	  handling, and a bug reported by syzbot:
	  - nilfs2: fix potential use after free in
	    nilfs_gccache_submit_read_data()
	  - nilfs2: fix missing error check for sb_set_blocksize call
	  - nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage()

nilfs2-kmod8-1.11  Mon Sep 4, 2023 JST

	* backport fixes for user-after-free read, general protection fault,
	  and kernel warning issues under abnormal conditions reported by
	  syzbot:
	  - nilfs2: fix use-after-free of nilfs_root in dirtying inodes via
	    iput
	  - nilfs2: fix general protection fault in
	    nilfs_lookup_dirty_data_buffers()
	  - nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer
	    reuse

nilfs2-kmod8-1.10  Sat Jun 24, 2023 JST

	* backport fixes for general protection faults on corrupted disk images
	  and buffer corruption issues caused by concurrent device reads:
	  - nilfs2: prevent general protection fault in
	    nilfs_clear_dirty_page()
	  - nilfs2: fix buffer corruption due to concurrent device reads

nilfs2-kmod8-1.9  Wed Jun 14, 2023 JST

	* backport recent fixes for various issues reported by syzbot:
	  - nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
	  - nilfs2: reject devices with insufficient block count
	  - nilfs2: fix possible out-of-bounds segment allocation in resize
	    ioctl
	  - nilfs2: fix incomplete buffer cleanup in
	    nilfs_btnode_abort_change_key()
	* add inline function compatibility definitions for maintenance:
	  - Allow to use bdev_nr_bytes() and sb_bdev_nr_blocks()

nilfs2-kmod8-1.8  Sun May 7, 2023 JST

	* backport fixes for kernel hangs and writes even after read-only
	  degeneration:
	  - nilfs2: do not write dirty data after degenerating to read-only
	  - nilfs2: fix infinite loop in nilfs_mdt_get_block()

nilfs2-kmod8-1.7  Sun Apr 23, 2023 JST

	* backport another missing block initialization fix:
	  - nilfs2: initialize unused bytes in segment summary blocks

nilfs2-kmod8-1.6  Sun Apr 16, 2023 JST

	* backport fixes for a potential use-after-free read issue and
	  missing segment summary data initialization:
	  - nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field
	  - nilfs2: fix potential UAF of struct nilfs_sc_info in
	    nilfs_segctor_thread()
	* backport the fix for potential null pointer dereferences,
	  use-after-free, and lockdep warnings caused by improper sysfs
	  interface lifetime:
	  - nilfs2: fix sysfs interface lifetime

nilfs2-kmod8-1.5  Mon Mar 27, 2023 JST

	* backport the fix for a potential kernel information leak when
	  specifying anomalous ioctl parameters:
	  - nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy()
	* backport improved anomaly checks for corrupted disk images:
	  - nilfs2: prevent WARNING in nilfs_dat_commit_end()
	  - nilfs2: replace WARN_ONs for invalid DAT metadata block requests

nilfs2-kmod8-1.4  Sun Feb 19, 2023 JST

	* backport fixes for general protection faults on corrupted disk
	  images, an out-of-bounds block access issue on empty or very small
	  devices, bad segment counts and a writer thread hang issue after
	  attempting to resize to very small sizes:
	  - nilfs2: fix general protection fault in nilfs_btree_insert()
	  - nilfs2: fix underflow in second superblock position calculations

nilfs2-kmod8-1.3  Sun Dec 25, 2022 JST

	* backport the fixes for potential shift-out-of-bounds issues at mount
	  time against corrupted disk images:
	  - nilfs2: fix shift-out-of-bounds/overflow in nilfs_sb2_bad_offset()
	  - nilfs2: fix shift-out-of-bounds due to too large exponent of block
	    size

nilfs2-kmod8-1.2  Mon Dec 5, 2022 JST

	* backport bug fixes:
	  - nilfs2: fix nilfs_sufile_mark_dirty() not set segment usage as
	    dirty
	  - nilfs2: fix NULL pointer dereference in
	    nilfs_palloc_commit_free_entry()

nilfs2-kmod8-1.1  Sun Nov 20, 2022 JST

	* backport bug fixes:
	  - nilfs2: fix deadlock in nilfs_count_free_blocks()
	  - nilfs2: fix use-after-free bug of ns_writer on remount

nilfs2-kmod8-1.0  Mon Oct 24, 2022 JST

	* Fix build issues with older RHEL 8 kernels:
	  - Allow to use sysfs_emit() in old kernels (< 8.5)
	  - Allow to add gfp argument to blkdev_issue_flush() for old kernels
	    (< 8.6)
	  - Add dummy error sector argument to blkdev_issue_flush() for old
	    kernels (< 8.4)
	  - Allow to use the fallthrough keyword in older kernels (< 8.4)
	  - Revert "nilfs2: use default_groups in kobj_type" (< 8.3)
	  - Avoid using unexported __inode_attach_wb() in older kernels (< 8.3)
	  - nilfs2-kmod8: output an error when compiling against unsupported
	    versions (= 8.0)
	* Makefile updates:
	  - nilfs2-kmod8: pass RHEL release number to preprocessor
	  - Include header files in local include/uapi directory
	  - Use KBUILD_EXTMOD instead of SUBDIRS in fs/nilfs2/Makefile
	  - Use KBUILD_CFLAGS and LINUXINCLUDE instead of EXTRA_CFLAGS

nilfs2-kmod8-0.2  Sun Oct 16, 2022 JST

	* backport bug fixes:
	  - nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition
	    failure
	  - nilfs2: fix use-after-free bug of struct nilfs_root
	  - nilfs2: fix NULL pointer dereference at
	    nilfs_bmap_lookup_at_level()
	  - nilfs2: fix leak of nilfs_root in case of writer thread creation
	    failure

nilfs2-kmod8-0.1  Wed Oct 12, 2022 JST

	* backport RHEL 8 changes:
	  - block: use an on-stack bio in blkdev_issue_flush
	  - block: remove the error_sector argument to blkdev_issue_flush
	  - fs/nilfs2/file.c: use new return type vm_fault_t
	  - nilfs2: Convert to XArray
	  - nilfs2: Use xa_erase_irq
	  - XArray: Change xa_insert to return -EBUSY
	  - treewide: Use fallthrough pseudo-keyword
	  - Allow to backport vfs_ioc_setflags_prepare()
	  - Allow to backport the new readahead aop
	* backport bug fixes:
	  - nilfs2: use 64-bit superblock timstamps
	  - nilfs2: fix null pointer dereference at
	    nilfs_segctor_do_construct()
	  - nilfs2: only call unlock_new_inode() if I_NEW
	  - nilfs2: fix memory leak in nilfs_sysfs_delete_device_group
	  - nilfs2: fix memory leak in nilfs_sysfs_create_device_group
	  - nilfs2: fix NULL pointer in nilfs_##name##_attr_release
	  - nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group
	  - nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group
	  - nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group
	  - nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
	  - nilfs2: use refcount_dec_and_lock() to fix potential UAF
	  - nilfs2: fix lockdep warnings in page operations for btree nodes
	  - nilfs2: fix lockdep warnings during disk space reclamation
	  - nilfs2: get rid of nilfs_mapping_init()
	  - nilfs2: fix incorrect masking of permission flags for symlinks
	  - nilfs2: fix use-after-free bug in nilfs_mdt_destroy()
	* backport documentation fixes:
	  - nilfs2: fix some kernel-doc warnings for nilfs2
	  - fs/nilfs2: fix misspellings using codespell tool
	  - nilfs2: fix typos in comments
	* backport other changes:
	  - nilfs2: convert to SPDX license tags
	  - nilfs2: replace snprintf in show functions with sysfs_emit
	  - nilfs2: remove filenames from file comments
	  - nilfs2: use default_groups in kobj_type
	  - nilfs2: convert __nilfs_msg to integrate the level and format
	  - nilfs2: use a more common logging style
	* add ChangeLog file
	* add README file
	* add kern_feature.h header file
	* add .gitignore file
	* Import source files from stable kernel-4.18.y.