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| author |   Su Yue <suy.fnst@cn.fujitsu.com> | 2017-06-06 17:57:00 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2017-06-21 19:16:04 +0200 |
| commit | 19c6dcbfa74674ac5ab5d18096ee813f858668c3 (patch) | |
| tree | fc86826db4b41589e939aa3a4dff56be67056273 /fs/btrfs/ctree.h | |
| parent | btrfs: move dev stats accounting out of wait_dev_flush (diff) | |
| download | linux-dev-19c6dcbfa74674ac5ab5d18096ee813f858668c3.tar.xz linux-dev-19c6dcbfa74674ac5ab5d18096ee813f858668c3.zip | |
btrfs: Introduce btrfs_is_name_len_valid to avoid reading beyond boundary
Introduce function btrfs_is_name_len_valid.
The function compares parameter @name_len with item boundary then
returns true if name_len is valid.
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ s/btrfs_leaf_data/BTRFS_LEAF_DATA_OFFSET/ ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 15a77e64dc20..d182ce792173 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3042,6 +3042,8 @@ struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, struct btrfs_path *path, const char *name, int name_len); +bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot, + unsigned long start, u16 name_len); /* orphan.c */ int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, |