Commit b56baf5b authored by Yan's avatar Yan Committed by Chris Mason

Minor fix for btrfs_csum_file_block.

Execution should goto label 'insert' when 'btrfs_next_leaf' return a
non-zero value, otherwise the parameter 'slot' for
'btrfs_item_key_to_cpu' may be out of bounds. The original codes jump
to  label 'insert' only when 'btrfs_next_leaf' return a negative
value.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 689f9346
......@@ -178,13 +178,11 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
nritems = btrfs_header_nritems(path->nodes[0]);
if (path->slots[0] >= nritems - 1) {
ret = btrfs_next_leaf(root, path);
if (ret == 1) {
if (ret == 1)
found_next = 1;
} else if (ret == 0) {
slot = 0;
} else {
if (ret != 0)
goto insert;
}
slot = 0;
}
btrfs_item_key_to_cpu(path->nodes[0], &found_key, slot);
if (found_key.objectid != objectid ||
......@@ -238,7 +236,7 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
csum_offset = 0;
if (found_next) {
u64 tmp = min((u64)i_size_read(inode), next_offset);
tmp -= offset + root->sectorsize - 1;
tmp -= offset & ~((u64)root->sectorsize -1);
tmp >>= root->fs_info->sb->s_blocksize_bits;
tmp = max((u64)1, tmp);
tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root));
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment