diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index b56a8d8b4838..a4f3ea6c5f37 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -10364,8 +10364,11 @@ static void find_equal_scalars(struct bpf_verifier_state *vstate,
 	struct bpf_reg_state *reg;
 
 	bpf_for_each_reg_in_vstate(vstate, state, reg, ({
-		if (reg->type == SCALAR_VALUE && reg->id == known_reg->id)
+		if (reg->type == SCALAR_VALUE && reg->id == known_reg->id) {
+			s32 saved_subreg_def = reg->subreg_def;
 			copy_register_state(reg, known_reg);
+			reg->subreg_def = saved_subreg_def;
+		}
 	}));
 }