diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index d0b7e0249c133619fbb081881e054cab393ebb49..fb70bbd9e6d1dddb4fc5aed5d37e2844e39d493b 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -52,6 +52,8 @@
 #include <net/ip6_checksum.h>
 #include <linux/netconf.h>
 
+#include <linux/nospec.h>
+
 struct ip6mr_rule {
 	struct fib_rule		common;
 };
@@ -1831,6 +1833,7 @@ int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 			return -EFAULT;
 		if (vr.mifi >= mrt->maxvif)
 			return -EINVAL;
+		vr.mifi = array_index_nospec(vr.mifi, mrt->maxvif);
 		read_lock(&mrt_lock);
 		vif = &mrt->vif_table[vr.mifi];
 		if (VIF_EXISTS(mrt, vr.mifi)) {
@@ -1905,6 +1908,7 @@ int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
 			return -EFAULT;
 		if (vr.mifi >= mrt->maxvif)
 			return -EINVAL;
+		vr.mifi = array_index_nospec(vr.mifi, mrt->maxvif);
 		read_lock(&mrt_lock);
 		vif = &mrt->vif_table[vr.mifi];
 		if (VIF_EXISTS(mrt, vr.mifi)) {