[PATCH 0/3] btrfs: tree-checker: Enhancement and fixes for new fuzzed image report

[Qu Wenruo <wqu@suse.com>]

This patchset can be fetched from:
https://github.com/adam900710/linux/tree/tree_checker_enhancement

The base branch write_time_tree_checker, the base commit is:
commit cb3ba69132a83d5e87f243dece5db09a022b0be7 (github/write_time_tree_checker, write_time_tree_checker)
Author: Qu Wenruo <wqu@suse.com>
Date:   Thu Jan 17 15:15:14 2019 +0800

    btrfs: Do mandatory tree block check before submitting bio


Yoon Jungyeon reported several fuzzed image screwing up btrfs.

3 of the reported images are mount panic and can be addressed by tree
checker enhancement and fix.

This patchset addresses those 3 mount panic by:
- Verify chunk items
  This merges the existing btrfs_check_chunk_valid() and apply it to all
  chunk items, both in super block syschunk array and all tree blocks.

- Verify dev item
  This could avoid NULL pointer workaround for seed dummy.

- Don't trigger comprehensive root owner check if tree root is not
  initialized yet

The remaining runtime problem needs extra inspection, and some isn't so
easy to fix by tree-checker alone.

Reported-by: Yoon Jungyeon <jungyeon@gatech.edu>

Qu Wenruo (3):
  btrfs: tree-checker: Verify chunk items
  btrfs: tree-checker: Verify dev item
  btrfs: tree-checker: Fix NULL pointer access for corrupted chunk root

 fs/btrfs/tree-checker.c | 242 +++++++++++++++++++++++++++++++++++++++-
 fs/btrfs/tree-checker.h |   3 +
 fs/btrfs/volumes.c      | 103 +----------------
 fs/btrfs/volumes.h      |   9 ++
 4 files changed, 254 insertions(+), 103 deletions(-)

-- 
2.21.0