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authorSu Yue <suy.fnst@cn.fujitsu.com>2017-06-06 17:57:00 +0800
committerDavid Sterba <dsterba@suse.com>2017-06-21 19:16:04 +0200
commit19c6dcbfa74674ac5ab5d18096ee813f858668c3 (patch)
treefc86826db4b41589e939aa3a4dff56be67056273 /fs/btrfs/ctree.h
parent66b4993e95c17e0ee30f0d72f0d6e00e5c035a98 (diff)
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.h2
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,