1 files changed, 4 insertions, 4 deletions

diff --git a/src/lib/libcrypto/bn/bn_div.c b/src/lib/libcrypto/bn/bn_div.c
index ac1a09615a..f9a095e3b3 100644
--- a/src/lib/libcrypto/bn/bn_div.c
+++ b/src/lib/libcrypto/bn/bn_div.c
@@ -200,10 +200,10 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
 
         /* First we normalise the numbers */
         norm_shift=BN_BITS2-((BN_num_bits(divisor))%BN_BITS2);
-        BN_lshift(sdiv,divisor,norm_shift);
+        if (!(BN_lshift(sdiv,divisor,norm_shift))) goto err;
         sdiv->neg=0;
         norm_shift+=BN_BITS2;
-        BN_lshift(snum,num,norm_shift);
+        if (!(BN_lshift(snum,num,norm_shift))) goto err;
         snum->neg=0;
         div_n=sdiv->top;
         num_n=snum->top;
@@ -327,7 +327,7 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
                 tmp->top=j;
 
                 j=wnum.top;
-                BN_sub(&wnum,&wnum,tmp);
+                if (!BN_sub(&wnum,&wnum,tmp)) goto err;
 
                 snum->top=snum->top+wnum.top-j;
 
@@ -335,7 +335,7 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor,
                         {
                         q--;
                         j=wnum.top;
-                        BN_add(&wnum,&wnum,sdiv);
+                        if (!BN_add(&wnum,&wnum,sdiv)) goto err;
                         snum->top+=wnum.top-j;
                         }
                 *(resp--)=q;