[PATCH v2 0/3] btrfs: add missing NULL checks when searching for roots

[fdmanana@kernel.org]

From: Filipe Manana <fdmanana@suse.com>

Remove a wrong but harmless expression before loading an extent root and
add missing error handling for some root search functions, which can
return NULL when using the extent tree v2 feature. Some places have the
NULL checks already, but many others completely ignore it. Chris recently
reported this with his AI generated reviews.

V2: Fixed a return without mutex unlock in patch 2/3, updated patch 3/3
    to log the logical bytenr of a delayed ref in case we can't find
    the csum root.

Filipe Manana (3):
  btrfs: remove bogus root search condition in load_extent_tree_free()
  btrfs: check for NULL root after calls to btrfs_extent_root()
  btrfs: check for NULL root after calls to btrfs_csum_root()

 fs/btrfs/backref.c         | 28 +++++++++++
 fs/btrfs/block-group.c     | 39 ++++++++++++++-
 fs/btrfs/disk-io.c         | 17 ++++++-
 fs/btrfs/extent-tree.c     | 98 ++++++++++++++++++++++++++++++++++++--
 fs/btrfs/file-item.c       |  7 +++
 fs/btrfs/free-space-tree.c |  9 +++-
 fs/btrfs/inode.c           | 18 ++++++-
 fs/btrfs/qgroup.c          |  8 ++++
 fs/btrfs/raid56.c          | 12 ++++-
 fs/btrfs/relocation.c      | 30 +++++++++++-
 fs/btrfs/tree-log.c        | 21 ++++++++
 fs/btrfs/zoned.c           |  7 +++
 12 files changed, 278 insertions(+), 16 deletions(-)

-- 
2.47.2