fstab-generator: fix new NULL dereference. (#6296)

fstype can be NULL, particularly when called from add_sysroot_mount(),
so we need to use STRPTR_IN_SET().

diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index 7688a75f1258a48b7234ee150bde8f122db1cadf..ce9dccfe68c6689577ba128a928205c7502e15da 100644 (file)
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -358,7 +358,7 @@ static int add_mount(
                 "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
                 source);
 
-        if (STR_IN_SET(fstype, "nfs", "nfs4") && !automount &&
+        if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !automount &&
             fstab_test_yes_no_option(opts, "bg\0" "fg\0")) {
                 /* The default retry timeout that mount.nfs uses for 'bg' mounts
                  * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts.