diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index aaba4c2aae23..ec7fac511c8d 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2351,14 +2351,18 @@ static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
 
 		if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
 		    !mld_in_v1_mode(idev)) {
-			psf->sf_crcount = idev->mc_qrv;
-			rcu_assign_pointer(psf->sf_next,
-					   mc_dereference(pmc->mca_tomb, idev));
-			rcu_assign_pointer(pmc->mca_tomb, psf);
-			rv = 1;
-		} else {
-			kfree_rcu(psf, rcu);
+			struct ip6_sf_list *dpsf = kmalloc_obj(*dpsf);
+
+			if (dpsf) {
+				*dpsf = *psf;
+				dpsf->sf_crcount = idev->mc_qrv;
+				rcu_assign_pointer(dpsf->sf_next,
+						   mc_dereference(pmc->mca_tomb, idev));
+				rcu_assign_pointer(pmc->mca_tomb, dpsf);
+				rv = 1;
+			}
 		}
+		kfree_rcu(psf, rcu);
 	}
 	return rv;
 }