isl_equalities.c: parameter_compression_multi: avoid NULL pointer dereference

diff --git a/isl_equalities.c b/isl_equalities.c
index 0e1faa5..60c5e94 100644 (file)
--- a/isl_equalities.c
+++ b/isl_equalities.c
@@ -186,8 +186,12 @@ static struct isl_mat *parameter_compression_multi(
        A = isl_mat_left_hermite(A, 0, NULL, NULL);
        T = isl_mat_sub_alloc(A->ctx, A->row, 0, A->n_row, 0, A->n_row);
        T = isl_mat_lin_to_aff(T);
+       if (!T)
+               goto error;
        isl_int_set(T->row[0][0], D);
        T = isl_mat_right_inverse(T);
+       if (!T)
+               goto error;
        isl_assert(T->ctx, isl_int_is_one(T->row[0][0]), goto error);
        T = isl_mat_transpose(T);
        isl_mat_free(A);