Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch

[linux.git] / lib / mpi / mpi-div.c

diff --git a/lib/mpi/mpi-div.c b/lib/mpi/mpi-div.c
index c3087d1390ce5d1b669ce7f1326b4eaf079d2caa..f68cbbb4d4a4ec74246be1559e2beaa0c1ce5284 100644 (file)
--- a/lib/mpi/mpi-div.c
+++ b/lib/mpi/mpi-div.c
@@ -149,6 +149,9 @@ int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den)
        mpi_ptr_t marker[5];
        int markidx = 0;
 
+       if (!dsize)
+               return -EINVAL;
+
        memset(marker, 0, sizeof(marker));
 
        /* Ensure space is enough for quotient and remainder.
@@ -207,6 +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. */