From: Thomas Bächler <thomas@archlinux.org>
Date: Sun, 16 Feb 2014 13:58:06 +0000 (+0100)
Subject: libmount: initialize *root to NULL in mnt_table_get_root_fs
X-Git-Tag: v2.25-rc1~595
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2e358a901f0a20fe9abe68f9ce6ce3efa87836dd;p=thirdparty%2Futil-linux.git

libmount: initialize *root to NULL in mnt_table_get_root_fs

mnt_table_get_root_fs only works when *root is set to NULL. This
is not only undocumented, but also unintuitive. Fix it by initializing
*root inside mnt_table_get_root_fs.

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/libmount/src/tab.c b/libmount/src/tab.c
index 8ae49c8dfe..4c2f8a4ace 100644
--- a/libmount/src/tab.c
+++ b/libmount/src/tab.c
@@ -510,6 +510,8 @@ int mnt_table_get_root_fs(struct libmnt_table *tb, struct libmnt_fs **root)
 
 	DBG(TAB, mnt_debug_h(tb, "lookup root fs"));
 
+	*root = NULL;
+
 	mnt_reset_iter(&itr, MNT_ITER_FORWARD);
 	while(mnt_table_next_fs(tb, &itr, &fs) == 0) {
 		int id = mnt_fs_get_parent_id(fs);