From: Karel Zak <kzak@redhat.com>
Date: Wed, 18 Aug 2021 09:02:45 +0000 (+0200)
Subject: libmount: make mnt_table_get_fs_root() more robust [gcc-analyzer]
X-Git-Tag: v2.38-rc1~288
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0fab76bd23a8b4b0a939a3b6fdb4545ff5737d62;p=thirdparty%2Futil-linux.git

libmount: make mnt_table_get_fs_root() more robust [gcc-analyzer]

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

diff --git a/libmount/src/tab.c b/libmount/src/tab.c
index 110560176e..e1e308dc51 100644
--- a/libmount/src/tab.c
+++ b/libmount/src/tab.c
@@ -1665,7 +1665,7 @@ struct libmnt_fs *mnt_table_get_fs_root(struct libmnt_table *tb,
 
 		DBG(FS, ul_debugobj(fs, "source root: %s, source FS root: %s", root, src_root));
 
-		if (src_root && !startswith(root, src_root)) {
+		if (src_root && root && !startswith(root, src_root)) {
 			if (strcmp(root, "/") == 0) {
 				free(root);
 				root = strdup(src_root);