Btrfs: detect corruption when non-root leaf has zero item

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Right now we treat leaf which has zero item as a valid one
because we could have an empty tree, that is, a root that is
also a leaf without any item, however, in the same case but
when the leaf is not a root, we can end up with hitting the
BUG_ON(1) in btrfs_extend_item() called by
setup_inline_extent_backref().

This makes us check the situation as a corruption if leaf is
not its own root.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

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Liu Bo 2016-08-23 15:22:58 -07:00 • committed by Chris Mason

parent 053ab70f06

commit 1ba98d086f

1 changed files with 22 additions and 1 deletions

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fs/btrfs/disk-io.c

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