crypto/bn/bn_mod.c:186: error: BUFFER_OVERRUN_L3
  Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_lshift1`.
Showing all 23 steps of the trace


crypto/bn/bn_mod.c:159:1: Parameter `r->top`
157.    * m
158.    */
159. > int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m)
160.   {
161.       if (r != a) {

crypto/bn/bn_mod.c:170:38: Call
168.   
169.           /* 0 < r < m */
170.           max_shift = BN_num_bits(m) - BN_num_bits(r);
                                            ^
171.           /* max_shift >= 0 */
172.   

crypto/bn/bn_lib.c:166:9: Call
  164.       bn_check_top(a);
  165.   
  166.       if (BN_is_zero(a))
                 ^
  167.           return 0;
  168.       return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));

crypto/bn/bn_lib.c:852:1: Parameter `a->top`
    850.   }
    851.   
    852. > int BN_is_zero(const BIGNUM *a)
    853.   {
    854.       return a->top == 0;

crypto/bn/bn_mod.c:186:18: Call
184.               n -= max_shift;
185.           } else {
186.               if (!BN_lshift1(r, r))
                        ^
187.                   return 0;
188.               --n;

crypto/bn/bn_shift.c:13:1: Parameter `r->top`
  11.   #include "bn_lcl.h"
  12.   
  13. > int BN_lshift1(BIGNUM *r, const BIGNUM *a)
  14.   {
  15.       register BN_ULONG *ap, *rp, t, c;

crypto/bn/bn_shift.c:23:13: Call
  21.       if (r != a) {
  22.           r->neg = a->neg;
  23.           if (bn_wexpand(r, a->top + 1) == NULL)
                    ^
  24.               return (0);
  25.           r->top = a->top;

crypto/bn/bn_lib.c:948:1: Parameter `a->top`
    946.   }
    947.   
    948. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
    949.   {
    950.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:950:37: Call
    948.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
    949.   {
    950.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                               ^
    951.   }
    952.   

crypto/bn/bn_lib.c:284:1: Parameter `b->top`
      282.    */
      283.   
      284. > BIGNUM *bn_expand2(BIGNUM *b, int words)
      285.   {
      286.       bn_check_top(b);

crypto/bn/bn_lib.c:289:23: Call
      287.   
      288.       if (words > b->dmax) {
      289.           BN_ULONG *a = bn_expand_internal(b, words);
                                   ^
      290.           if (!a)
      291.               return NULL;

crypto/bn/bn_lib.c:246:1: <Offset trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `b->top`
        244.   /* This is used by bn_expand2() */
        245.   /* The caller MUST check that words > b->dmax before calling this */
        246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
        247.   {
        248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `words`
        244.   /* This is used by bn_expand2() */
        245.   /* The caller MUST check that words > b->dmax before calling this */
        246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
        247.   {
        248.       BN_ULONG *a = NULL;

crypto/bn/bn_lib.c:263:13: Call
        261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
        262.       else
        263.           a = OPENSSL_zalloc(words * sizeof(*a));
                           ^
        264.       if (a == NULL) {
        265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/mem.c:186:1: Parameter `num`
          184.   }
          185.   
          186. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
          187.   {
          188.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:188:17: Call
          186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
          187.   {
          188.       void *ret = CRYPTO_malloc(num, file, line);
                                 ^
          189.   
          190.       FAILTEST();

crypto/mem.c:166:9: Assignment
            164.   
            165.       if (num == 0)
            166.           return NULL;
                           ^
            167.   
            168.       FAILTEST();

crypto/mem.c:188:5: Assignment
          186.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
          187.   {
          188.       void *ret = CRYPTO_malloc(num, file, line);
                     ^
          189.   
          190.       FAILTEST();

crypto/mem.c:193:5: Assignment
          191.       if (ret != NULL)
          192.           memset(ret, 0, num);
          193.       return ret;
                     ^
          194.   }
          195.   

crypto/bn/bn_lib.c:263:9: Assignment
        261.           a = OPENSSL_secure_zalloc(words * sizeof(*a));
        262.       else
        263.           a = OPENSSL_zalloc(words * sizeof(*a));
                       ^
        264.       if (a == NULL) {
        265.           BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);

crypto/bn/bn_lib.c:271:9: Array access: Offset added: [8, +oo] Size: [0, 67108856] by call to `BN_lshift1` 
        269.       assert(b->top <= words);
        270.       if (b->top > 0)
        271.           memcpy(a, b->d, sizeof(*a) * b->top);
                       ^
        272.   
        273.       return a;

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *a = NULL;
    bn_check_top(b);
    if (words > (INT_MAX / (4 * BN_BITS2))) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
        return NULL;
    }
    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
        return (NULL);
    }
    if (BN_get_flags(b, BN_FLG_SECURE))
        a = OPENSSL_secure_zalloc(words * sizeof(*a));
    else
        a = OPENSSL_zalloc(words * sizeof(*a));
    if (a == NULL) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
        return (NULL);
    }
    assert(b->top <= words);
    if (b->top > 0)
        memcpy(a, b->d, sizeof(*a) * b->top);
    return a;
}
['int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m)\n{\n    if (r != a) {\n        if (BN_copy(r, a) == NULL)\n            return 0;\n    }\n    while (n > 0) {\n        int max_shift;\n        max_shift = BN_num_bits(m) - BN_num_bits(r);\n        if (max_shift < 0) {\n            BNerr(BN_F_BN_MOD_LSHIFT_QUICK, BN_R_INPUT_NOT_REDUCED);\n            return 0;\n        }\n        if (max_shift > n)\n            max_shift = n;\n        if (max_shift) {\n            if (!BN_lshift(r, r, max_shift))\n                return 0;\n            n -= max_shift;\n        } else {\n            if (!BN_lshift1(r, r))\n                return 0;\n            --n;\n        }\n        if (BN_cmp(r, m) >= 0) {\n            if (!BN_sub(r, r, m))\n                return 0;\n        }\n    }\n    bn_check_top(r);\n    return 1;\n}', 'int BN_num_bits(const BIGNUM *a)\n{\n    int i = a->top - 1;\n    bn_check_top(a);\n    if (BN_is_zero(a))\n        return 0;\n    return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));\n}', 'int BN_is_zero(const BIGNUM *a)\n{\n    return a->top == 0;\n}', 'int BN_lshift1(BIGNUM *r, const BIGNUM *a)\n{\n    register BN_ULONG *ap, *rp, t, c;\n    int i;\n    bn_check_top(r);\n    bn_check_top(a);\n    if (r != a) {\n        r->neg = a->neg;\n        if (bn_wexpand(r, a->top + 1) == NULL)\n            return (0);\n        r->top = a->top;\n    } else {\n        if (bn_wexpand(r, a->top + 1) == NULL)\n            return (0);\n    }\n    ap = a->d;\n    rp = r->d;\n    c = 0;\n    for (i = 0; i < a->top; i++) {\n        t = *(ap++);\n        *(rp++) = ((t << 1) | c) & BN_MASK2;\n        c = (t & BN_TBIT) ? 1 : 0;\n    }\n    if (c) {\n        *rp = 1;\n        r->top++;\n    }\n    bn_check_top(r);\n    return (1);\n}', 'BIGNUM *bn_wexpand(BIGNUM *a, int words)\n{\n    return (words <= a->dmax) ? a : bn_expand2(a, words);\n}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n{\n    bn_check_top(b);\n    if (words > b->dmax) {\n        BN_ULONG *a = bn_expand_internal(b, words);\n        if (!a)\n            return NULL;\n        if (b->d) {\n            OPENSSL_cleanse(b->d, b->dmax * sizeof(b->d[0]));\n            bn_free_d(b);\n        }\n        b->d = a;\n        b->dmax = words;\n    }\n    bn_check_top(b);\n    return b;\n}', 'static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)\n{\n    BN_ULONG *a = NULL;\n    bn_check_top(b);\n    if (words > (INT_MAX / (4 * BN_BITS2))) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);\n        return NULL;\n    }\n    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);\n        return (NULL);\n    }\n    if (BN_get_flags(b, BN_FLG_SECURE))\n        a = OPENSSL_secure_zalloc(words * sizeof(*a));\n    else\n        a = OPENSSL_zalloc(words * sizeof(*a));\n    if (a == NULL) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);\n        return (NULL);\n    }\n    assert(b->top <= words);\n    if (b->top > 0)\n        memcpy(a, b->d, sizeof(*a) * b->top);\n    return a;\n}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    FAILTEST();\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)\n        return malloc_impl(num, file, line);\n    if (num == 0)\n        return NULL;\n    FAILTEST();\n    allow_customize = 0;\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    osslargused(file); osslargused(line);\n    ret = malloc(num);\n#endif\n    return ret;\n}']