1 files changed, 7 insertions, 2 deletions

diff --git a/src/lib/libcrypto/bn/bn_mul.c b/src/lib/libcrypto/bn/bn_mul.c
index 12e5be80eb..a0e9ec3b46 100644
--- a/src/lib/libcrypto/bn/bn_mul.c
+++ b/src/lib/libcrypto/bn/bn_mul.c
@@ -551,7 +551,7 @@ void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
              int tna, int tnb, BN_ULONG *t)
         {
         int i,j,n2=n*2;
-        int c1,c2,neg;
+        int c1,c2,neg,zero;
         BN_ULONG ln,lo,*p;
 
 # ifdef BN_COUNT
@@ -567,7 +567,7 @@ void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
         /* r=(a[0]-a[1])*(b[1]-b[0]) */
         c1=bn_cmp_part_words(a,&(a[n]),tna,n-tna);
         c2=bn_cmp_part_words(&(b[n]),b,tnb,tnb-n);
-        neg=0;
+        zero=neg=0;
         switch (c1*3+c2)
                 {
         case -4:
@@ -575,6 +575,7 @@ void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
                 bn_sub_part_words(&(t[n]),b,      &(b[n]),tnb,n-tnb); /* - */
                 break;
         case -3:
+                zero=1;
                 /* break; */
         case -2:
                 bn_sub_part_words(t,      &(a[n]),a,      tna,tna-n); /* - */
@@ -584,6 +585,7 @@ void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
         case -1:
         case 0:
         case 1:
+                zero=1;
                 /* break; */
         case 2:
                 bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna); /* + */
@@ -591,6 +593,7 @@ void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
                 neg=1;
                 break;
         case 3:
+                zero=1;
                 /* break; */
         case 4:
                 bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna);
@@ -1009,6 +1012,7 @@ int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
                 {
                 if (i >= -1 && i <= 1)
                         {
+                        int sav_j =0;
                         /* Find out the power of two lower or equal
                            to the longest of the two numbers */
                         if (i >= 0)
@@ -1019,6 +1023,7 @@ int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
                                 {
                                 j = BN_num_bits_word((BN_ULONG)bl);
                                 }
+                        sav_j = j;
                         j = 1<<(j-1);
                         assert(j <= al || j <= bl);
                         k = j+j;