From: Alex Zhuravlev <bzzz@whamcloud.com>
Date: Mon, 30 Sep 2019 20:50:49 +0000 (+0300)
Subject: LU-12703 utils: reset rootpath in llapi_search_rootpath()
X-Git-Tag: 2.12.90~27
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=refs%2Fchanges%2F35%2F36335%2F4;p=fs%2Flustre-release.git

LU-12703 utils: reset rootpath in llapi_search_rootpath()

as get_root_path() can use it as a source and fail if
passed pathname contains garbage (on stack);

Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: I9f628353c872afc82a582b0a6ca960cd0e8cffcb
Reviewed-on: https://review.whamcloud.com/36335
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---

diff --git a/lustre/utils/liblustreapi.c b/lustre/utils/liblustreapi.c
index 3417c77..848a72d 100644
--- a/lustre/utils/liblustreapi.c
+++ b/lustre/utils/liblustreapi.c
@@ -1454,6 +1454,9 @@ int llapi_search_fsname(const char *pathname, char *fsname)
 
 int llapi_search_rootpath(char *pathname, const char *fsname)
 {
+	/* pathname can be used as an argument by get_root_path(),
+	 * clear it for safety */
+	pathname[0] = 0;
 	return get_root_path(WANT_PATH, (char *)fsname, NULL, pathname, -1);
 }