Can be fetched from github, which is based on v4.18-rc1 tag:
https://github.com/adam900710/linux/tree/tree_checker_enhance
Reported by Xu Wen <wen...@gatech.edu>, some crafted btrfs image can
cause unexpected kernel behavior.
All of them are related to block group and chunk, so this patchset will
enhance block group and chunk verification, so kernel can detect them
and error out gracefully (with user friendly error message showing
what's going wrong)
Obvious corruption (don't need to cross check with chunk/block group),
will be addressed by enhanced tree-checker.
(Most crafted images will be caught by tree-checker)
More complex corruption will be addressed mostly at
btrfs_read_block_groups(), doing extra cross reference check for
chunk<->block group mapping.
It may cause extra mount time, but compared to the existing time
consuming block group items search, all added check is done completely
in memory using rb_tree, so it shouldn't add too much overhead.
Qu Wenruo (5):
btrfs: tree-checker: Verify block_group_item
btrfs: tree-checker: Detect invalid empty essential tree
btrfs: relocation: Only remove reloc rb_trees if reloc control has
been initialized
btrfs: Check each block group has corresponding chunk at mount time
btrfs: Verify every chunk has corresponding block group at mount time
fs/btrfs/extent-tree.c | 107 +++++++++++++++++++++++++++++++++++--
fs/btrfs/relocation.c | 23 ++++----
fs/btrfs/tree-checker.c | 113 ++++++++++++++++++++++++++++++++++++++++
fs/btrfs/volumes.c | 2 +-
fs/btrfs/volumes.h | 2 +
5 files changed, 232 insertions(+), 15 deletions(-)
--
2.18.0
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