From: Karel Zak <kzak@redhat.com>
Date: Wed, 4 Jan 2023 11:57:03 +0000 (+0100)
Subject: libmount: fix possible double free
X-Git-Tag: v2.39-rc1~212
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=ab74f107f5f1d518d6114566ca46877ac6f746ca;p=thirdparty%2Futil-linux.git

libmount: fix possible double free

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

diff --git a/libmount/src/optstr.c b/libmount/src/optstr.c
index 0392fe5e8a..cfac346fe1 100644
--- a/libmount/src/optstr.c
+++ b/libmount/src/optstr.c
@@ -148,7 +148,7 @@ int mnt_optstr_append_option(char **optstr, const char *name, const char *value)
 	rc = mnt_buffer_append_option(&buf, name, nsz, value, vsz);
 	if (!rc)
 		*optstr = ul_buffer_get_data(&buf, NULL, NULL);
-	else
+	else if (osz == 0)
 		ul_buffer_free_data(&buf);
 
 	return rc;