From 488d7c4566536b8807381bc54e559fd43decd26a Mon Sep 17 00:00:00 2001 From: Su Yue Date: Tue, 6 Jun 2017 17:57:06 +0800 Subject: [PATCH] btrfs: Check name_len before reading btrfs_get_name In btrfs_get_name, there's btrfs_search_slot and reads name from inode_ref/root_ref. Call btrfs_is_name_len_valid in btrfs_get_name. Signed-off-by: Su Yue Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/export.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 87144c9f9593..fa66980726c9 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -282,6 +282,11 @@ static int btrfs_get_name(struct dentry *parent, char *name, name_len = btrfs_inode_ref_name_len(leaf, iref); } + ret = btrfs_is_name_len_valid(leaf, path->slots[0], name_ptr, name_len); + if (!ret) { + btrfs_free_path(path); + return -EIO; + } read_extent_buffer(leaf, name, name_ptr, name_len); btrfs_free_path(path); -- 2.20.1