For btrfs, it's possible to have empty leaf, but empty node is not
possible.
Add check for empty node for tree blocks.
Suggested-by: Josef Bacik <jba...@fb.com>
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
---
disk-io.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/disk-io.c b/disk-io.c
index 86abdeb..b4f185f 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -67,6 +67,11 @@ static int check_tree_block(struct btrfs_fs_info *fs_info,
nodesize))
return BTRFS_BAD_NRITEMS;
+ /* Only leaf can be empty */
+ if (btrfs_header_nritems(buf) == 0 &&
+ btrfs_header_level(buf) != 0)
+ return BTRFS_BAD_NRITEMS;
+
fs_devices = fs_info->fs_devices;
while (fs_devices) {
if (fs_info->ignore_fsid_mismatch ||
--
2.8.2
--
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