lib/mpi: added missing NULL check

Added missing NULL check after mpi_alloc_limb_space().

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Reviewed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/mpi/mpi-div.c b/lib/mpi/mpi-div.c
index 8a45717bd001..f68cbbb4d4a4 100644
--- a/lib/mpi/mpi-div.c
+++ b/lib/mpi/mpi-div.c
@@ -210,6 +210,8 @@ int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den)
                  * numerator would be gradually overwritten by the quotient limbs.  */
                 if (qp == np) { /* Copy NP object to temporary space.  */
                         np = marker[markidx++] = mpi_alloc_limb_space(nsize);
+                        if (!np)
+                                goto nomem;
                         MPN_COPY(np, qp, nsize);
                 }
         } else                  /* Put quotient at top of remainder. */