[openssl-commits] [openssl] OpenSSL_1_0_2-stable update

[Kurt Roeckx]

The branch OpenSSL_1_0_2-stable has been updated
       via  dfb23a5ac80bb9a74bd1f44a90ccff54bc3a8c31 (commit)
      from  b62a2f8a373d1889672599834acf95161f2883ce (commit)


- Log -----------------------------------------------------------------
commit dfb23a5ac80bb9a74bd1f44a90ccff54bc3a8c31
Author: Pascal Cuoq <cuoq at trust-in-soft.com>
Date:   Mon Oct 12 12:19:19 2015 +0200

    BN_GF2m_mod_inv(): check bn_wexpand return value
    
    Signed-off-by: Kurt Roeckx <kurt at roeckx.be>
    Reviewed-by: Rich Salz <rsalz at akamai.com>
    
    MR #1276, RT #4107
    
    (cherry picked from commit 94b3664a528258df5ebcaae213d19bf6568cc47d)

-----------------------------------------------------------------------

Summary of changes:
 crypto/bn/bn_gf2m.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/crypto/bn/bn_gf2m.c b/crypto/bn/bn_gf2m.c
index e48ca95..2c61da1 100644
--- a/crypto/bn/bn_gf2m.c
+++ b/crypto/bn/bn_gf2m.c
@@ -699,18 +699,21 @@ int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
         int top = p->top;
         BN_ULONG *udp, *bdp, *vdp, *cdp;
 
-        bn_wexpand(u, top);
+        if (!bn_wexpand(u, top))
+            goto err;
         udp = u->d;
         for (i = u->top; i < top; i++)
             udp[i] = 0;
         u->top = top;
-        bn_wexpand(b, top);
+        if (!bn_wexpand(b, top))
+          goto err;
         bdp = b->d;
         bdp[0] = 1;
         for (i = 1; i < top; i++)
             bdp[i] = 0;
         b->top = top;
-        bn_wexpand(c, top);
+        if (!bn_wexpand(c, top))
+          goto err;
         cdp = c->d;
         for (i = 0; i < top; i++)
             cdp[i] = 0;