libjail: fix handling of allow.mount.fusefs in jailparam_init

fusefs is inconsistently named. The kernel module is named "fuse", but the
mount helper is named "mount_fusefs" and the jail(8) parameter is named
"allow.mount.fusefs". Special case it in libjail.

Reviewed by:	jamie
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D17929

1 files changed, 11 insertions, 3 deletions

diff --git a/lib/libjail/jail.c b/lib/libjail/jail.c
index 3dd87b1072d1d..dc7fdf1479bd6 100644
--- a/lib/libjail/jail.c
+++ b/lib/libjail/jail.c
@@ -1050,10 +1050,18 @@ kldload_param(const char *name)
 		kl = kldload(name);
 	else if (strncmp(name, "allow.mount.", 12) == 0) {
 		/* Load the matching filesystem */
-		kl = kldload(name + 12);
+		const char *modname;
+
+		if (strcmp("fusefs", name + 12) == 0 ||
+		    strcmp("nofusefs", name + 12) == 0) {
+			modname = "fuse";
+		} else {
+			modname = name + 12;
+		}
+		kl = kldload(modname);
 		if (kl < 0 && errno == ENOENT &&
-		    strncmp(name + 12, "no", 2) == 0)
-			kl = kldload(name + 14);
+		    strncmp(modname, "no", 2) == 0)
+			kl = kldload(modname + 2);
 	} else {
 		errno = ENOENT;
 		return (-1);