From: Tim Hildering <hilderingt@posteo.net>
Date: Sun, 17 Feb 2019 23:01:18 +0000 (+0100)
Subject: libmount: check table membership before adding entry
X-Git-Tag: v2.34-rc1~110
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=beb60dbd6feab18fc75c5405dc52f6dce6fa4934;p=thirdparty%2Futil-linux.git

libmount: check table membership before adding entry

Added validation to function 'mnt_table_add_fs()' to check that added @fs
is not already a member of another table.

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

diff --git a/libmount/src/tab.c b/libmount/src/tab.c
index d80fb0579b..7f08730edc 100644
--- a/libmount/src/tab.c
+++ b/libmount/src/tab.c
@@ -411,6 +411,9 @@ int mnt_table_add_fs(struct libmnt_table *tb, struct libmnt_fs *fs)
 	if (!tb || !fs)
 		return -EINVAL;
 
+	if (!list_empty(&fs->ents))
+		return -EBUSY;
+
 	mnt_ref_fs(fs);
 	list_add_tail(&fs->ents, &tb->ents);
 	tb->nents++;