nilfs2-kmod8 1.24

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

nilfs2-kmod8 1.23

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

nilfs2-kmod8 1.22

• Backport fixes for two kernel bug that could occur when file system corruption was detected and the mount mode was degraded to read-only:
  • fix kernel bug due to missing clearing of buffer delay flag
  • fix kernel bug due to missing clearing of checked flag
• Backport a fix for a potential deadlock issue:
  • fix potential deadlock with newly created symlinks

nilfs2-kmod8 1.21

• 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:
  • propagate directory read errors from nilfs_find_entry()

nilfs2-kmod8 1.20

• Backport upstream fixes that prevent internal code -ENOENT from propagating to system calls:
  • treat missing sufile header block as metadata corruption
  • treat missing cpfile header block as metadata corruption
  • do not propagate ENOENT error from sufile during recovery
  • do not propagate ENOENT error from sufile during GC
  • 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:
  • fix potential null-ptr-deref in nilfs_btree_insert()
  • determine empty node blocks as corrupted
  • 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:
  • do not output warnings when clearing dirty buffers
• Backport a cleanup patch to remove code that is no longer needed by an existing fix:
  • do not repair reserved inode bitmap in nilfs_new_inode()

nilfs2-kmod8 1.19

• 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:
  • fix state management in error path of log writing function
  • fix missing cleanup on rollforward recovery error
  • 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:
  • handle inconsistent state in nilfs_btnode_create_block()
  • avoid undefined behavior in nilfs_cnt32_ge macro
• Backport a cleanup patch to resolve a conflict:
  • remove some unused macros to tame gcc

nilfs2-kmod8 1.18

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

nilfs2-kmod8 1.17

• Backport a fix for use-after-free of metadata file inodes that could cause kernel bugs when directory entries were corrupted:
  • 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:
  • fix inode number range checks
  • fix incorrect inode allocation from reserved inodes

nilfs2-kmod8 1.16

• 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:
  • fix potential kernel bug due to lack of writeback flag waiting
  • 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

• 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:
  • fix use-after-free of timer for log writer thread
  • fix unexpected freezing of nilfs_segctor_sync()
  • fix potential hang in nilfs_detach_log_writer()
• Backport fixes for potential issues with finishing block writes in rollforward recovery on mount:
  • make block erasure safe in nilfs_finish_roll_forward()
  • 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:
  • fix OOB in nilfs_set_de_type
• Backport one environment-dependent build warning fix:
  • fix out-of-range warning