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for-6.9-rc7-tag

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Merge tag 'for-6.9-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "Two more fixes, both have some visible effects on user space:

   - add check if quotas are enabled when passing qgroup inheritance
     info, this affects snapper that could fail to create a snapshot

   - do check for leaf/node flag WRITTEN earlier so that nodes are
     completely validated before access, this used to be done by
     integrity checker but it's been removed and left an unhandled case"

* tag 'for-6.9-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: make sure that WRITTEN is set on all metadata blocks
  btrfs: qgroup: do not check qgroup inherit if qgroup is disabled
This commit is contained in:
Linus Torvalds 2024-05-06 13:43:13 -07:00
commit dccb07f291
3 changed files with 18 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
fs/btrfs/qgroup.c
View file

@ -3045,6 +3045,8 @@ int btrfs_qgroup_check_inherit(struct btrfs_fs_info *fs_info,
struct btrfs_qgroup_inherit *inherit,
size_t size)
{
if (!btrfs_qgroup_enabled(fs_info))
return 0;
if (inherit->flags & ~BTRFS_QGROUP_INHERIT_FLAGS_SUPP)
return -EOPNOTSUPP;
if (size < sizeof(*inherit) || size > PAGE_SIZE)

24
fs/btrfs/tree-checker.c
View file

@ -1797,6 +1797,11 @@ enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf)
return BTRFS_TREE_BLOCK_INVALID_LEVEL;
}
if (unlikely(!btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_WRITTEN))) {
generic_err(leaf, 0, "invalid flag for leaf, WRITTEN not set");
return BTRFS_TREE_BLOCK_WRITTEN_NOT_SET;
}
/*
* Extent buffers from a relocation tree have a owner field that
* corresponds to the subvolume tree they are based on. So just from an
@ -1858,6 +1863,7 @@ enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf)
for (slot = 0; slot < nritems; slot++) {
u32 item_end_expected;
u64 item_data_end;
enum btrfs_tree_block_status ret;
btrfs_item_key_to_cpu(leaf, &key, slot);
@ -1913,21 +1919,10 @@ enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf)
return BTRFS_TREE_BLOCK_INVALID_OFFSETS;
}
/*
* We only want to do this if WRITTEN is set, otherwise the leaf
* may be in some intermediate state and won't appear valid.
*/
if (btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_WRITTEN)) {
enum btrfs_tree_block_status ret;
/*
* Check if the item size and content meet other
* criteria
*/
/* Check if the item size and content meet other criteria. */
ret = check_leaf_item(leaf, &key, slot, &prev_key);
if (unlikely(ret != BTRFS_TREE_BLOCK_CLEAN))
return ret;
}
prev_key.objectid = key.objectid;
prev_key.type = key.type;
@ -1957,6 +1952,11 @@ enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node)
int level = btrfs_header_level(node);
u64 bytenr;
if (unlikely(!btrfs_header_flag(node, BTRFS_HEADER_FLAG_WRITTEN))) {
generic_err(node, 0, "invalid flag for node, WRITTEN not set");
return BTRFS_TREE_BLOCK_WRITTEN_NOT_SET;
}
if (unlikely(level <= 0 || level >= BTRFS_MAX_LEVEL)) {
generic_err(node, 0,
"invalid level for node, have %d expect [1, %d]",

1
fs/btrfs/tree-checker.h
View file

@ -53,6 +53,7 @@ enum btrfs_tree_block_status {
BTRFS_TREE_BLOCK_INVALID_BLOCKPTR,
BTRFS_TREE_BLOCK_INVALID_ITEM,
BTRFS_TREE_BLOCK_INVALID_OWNER,
BTRFS_TREE_BLOCK_WRITTEN_NOT_SET,
};
/*