-/* crypto/bn/bn_print.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
char *buf;
char *p;
- buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2);
+ if (a->neg && BN_is_zero(a)) {
+ /* "-0" == 3 bytes including NULL terminator */
+ buf = OPENSSL_malloc(3);
+ } else {
+ buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2);
+ }
if (buf == NULL) {
BNerr(BN_F_BN_BN2HEX, ERR_R_MALLOC_FAILURE);
goto err;