From 59b0a7f2c7c1bf374db319fcc2c99305133d00d5 Mon Sep 17 00:00:00 2001 From: Su Yue Date: Tue, 6 Jun 2017 17:57:05 +0800 Subject: [PATCH] btrfs: Check name_len before read in iterate_dir_item Since iterate_dir_item checks name_len in its own way, so use btrfs_is_name_len_valid not 'verify_dir_item' to make more strict name_len check. Signed-off-by: Su Yue Reviewed-by: David Sterba [ switched ENAMETOOLONG to EIO ] Signed-off-by: David Sterba --- fs/btrfs/send.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index a562dc228794..e937c10b8287 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -1069,6 +1069,12 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path, } } + ret = btrfs_is_name_len_valid(eb, path->slots[0], + (unsigned long)(di + 1), name_len + data_len); + if (!ret) { + ret = -EIO; + goto out; + } if (name_len + data_len > buf_len) { buf_len = name_len + data_len; if (is_vmalloc_addr(buf)) { -- 2.20.1