Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / lib / mpi / mpi-pow.c

diff --git a/kernel/lib/mpi/mpi-pow.c b/kernel/lib/mpi/mpi-pow.c
index 5464c87..e24388a 100644 (file)
--- a/kernel/lib/mpi/mpi-pow.c
+++ b/kernel/lib/mpi/mpi-pow.c
@@ -64,8 +64,13 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod)
        if (!esize) {
                /* Exponent is zero, result is 1 mod MOD, i.e., 1 or 0
                 * depending on if MOD equals 1.  */
-               rp[0] = 1;
                res->nlimbs = (msize == 1 && mod->d[0] == 1) ? 0 : 1;
+               if (res->nlimbs) {
+                       if (mpi_resize(res, 1) < 0)
+                               goto enomem;
+                       rp = res->d;
+                       rp[0] = 1;
+               }
                res->sign = 0;
                goto leave;
        }