Vboot Reference: Initialize local pointers with NULL.

src/platform/vboot_reference/utils/dumpRSAPublicKey.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* C port of DumpPublicKey.java from the Android Open source project with
  * support for additional RSA key sizes. (platform/system/core,git/libmincrypt
  * /tools/DumpPublicKey.java). Uses the OpenSSL X509 and BIGNUM library.
  */
 
@@ skipping 25 matching lines @@
     return 0;
   }
   return 1;
 }
 
 /* Pre-processes and outputs RSA public key to standard out.
  */
 void output(RSA* key) {
   int i, nwords;
   BIGNUM *N = key->n;
-  BIGNUM *Big1, *Big2, *Big32, *BigMinus1;
-  BIGNUM *B;
-  BIGNUM *N0inv, *R, *RR, *RRTemp, *NnumBits;
-  BIGNUM *n, *rr;
+  BIGNUM *Big1 = NULL, *Big2 = NULL, *Big32 = NULL, *BigMinus1 = NULL;
+  BIGNUM *B = NULL;
+  BIGNUM *N0inv= NULL, *R = NULL, *RR = NULL, *RRTemp = NULL, *NnumBits = NULL;
+  BIGNUM *n = NULL, *rr = NULL;
   BN_CTX *bn_ctx = BN_CTX_new();
   uint32_t n0invout;
 
   N = key->n;
   /* Output size of RSA key in 32-bit words */
   nwords = BN_num_bits(N) / 32;
   if (-1 == write(1, &nwords, sizeof(nwords)))
     goto failure;
 
 
@@ skipping 112 matching lines @@
     output (pubkey);
   }
 
 fail:
   X509_free(cert);
   RSA_free(pubkey);
   fclose(fp);
 
   return 0;
 }