[PATCH v6 0/2] ocfs2: validate xattr entry bounds

[Cen Zhang <zzzccc427@gmail.com>]

Hi,

This series validates OCFS2 xattr entry name/value bounds when xattr
metadata is read and validated, before getxattr() or listxattr() can
walk out-of-range entry arrays or offsets from corrupted metadata.

Patch 1 validates inline xattrs from ocfs2_validate_inode_block().
Patch 2 reuses the same entry validator for non-indexed xattr blocks
and indexed xattr buckets.

Changes since v5:
  - Resend as a standalone thread.
  - No code changes.

Changes since v4:
  - Replace the descriptive string argument with enum
    ocfs2_xattr_entry_type.
  - Drop the new per-operation full inline-xattr re-check; operation
    paths keep their existing ibody header/count lookup, and full
    entry bounds validation now runs at inode block read time.
  - Simplify corruption messages to rely on the corrupt block number
    instead of also naming the xattr storage kind.

Cen Zhang (2):
  ocfs2: validate inline xattrs during inode block validation
  ocfs2: validate external xattr entries when reading metadata

 fs/ocfs2/inode.c |   4 +
 fs/ocfs2/xattr.c | 194 +++++++++++++++++++++++++++++++++++++++++++----
 fs/ocfs2/xattr.h |   2 +
 3 files changed, 187 insertions(+), 13 deletions(-)

-- 
2.43.0