From 19c6dcbfa74674ac5ab5d18096ee813f858668c3 Mon Sep 17 00:00:00 2001 From: Su Yue Date: Tue, 6 Jun 2017 17:57:00 +0800 Subject: 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 Reviewed-by: David Sterba [ s/btrfs_leaf_data/BTRFS_LEAF_DATA_OFFSET/ ] Signed-off-by: David Sterba --- fs/btrfs/ctree.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/btrfs/ctree.h') 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, -- cgit v1.2.3-59-g8ed1b