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btrfs: tree-checker: check for BTRFS_BLOCK_FLAG_FULL_BACKREF being set improperly 

We need to validate that a data extent item does not have the
FULL_BACKREF flag set on its flags.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2021-03-12 15:25:26 -05:00 committed by David Sterba
parent eb6b7fb4b5
commit 0ebb6bbbd4
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/tree-checker.c
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@ -1290,6 +1290,11 @@ static int check_extent_item(struct extent_buffer *leaf,
key->offset, fs_info->sectorsize);
return -EUCLEAN;
}
if (unlikely(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)) {
extent_err(leaf, slot,
"invalid extent flag, data has full backref set");
return -EUCLEAN;
}
}
ptr = (unsigned long)(struct btrfs_extent_item *)(ei + 1);