crypto/bn/bn_mod.c:192: error: MEMORY_LEAK
  memory dynamically allocated by call to `BN_CTX_start()` at line 188, column 5 is not reachable after line 192, column 14.
Showing all 57 steps of the trace


crypto/bn/bn_mod.c:178:1: start of procedure BN_mod_mul()
176.   
177.   /* slow but works */
178. > int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
179.                  BN_CTX *ctx)
180.   {

crypto/bn/bn_mod.c:182:5: 
180.   {
181.       BIGNUM *t;
182. >     int ret = 0;
183.   
184.       bn_check_top(a);

crypto/bn/bn_mod.c:188:5: 
186.       bn_check_top(m);
187.   
188. >     BN_CTX_start(ctx);
189.       if ((t = BN_CTX_get(ctx)) == NULL)
190.           goto err;

crypto/bn/bn_ctx.c:235:1: start of procedure BN_CTX_start()
  233.   }
  234.   
  235. > void BN_CTX_start(BN_CTX *ctx)
  236.   {
  237.       CTXDBG_ENTRY("BN_CTX_start", ctx);

crypto/bn/bn_ctx.c:239:9: Taking false branch
  237.       CTXDBG_ENTRY("BN_CTX_start", ctx);
  238.       /* If we're already overflowing ... */
  239.       if (ctx->err_stack || ctx->too_many)
                 ^
  240.           ctx->err_stack++;
  241.       /* (Try to) get a new frame pointer */

crypto/bn/bn_ctx.c:239:27: Taking false branch
  237.       CTXDBG_ENTRY("BN_CTX_start", ctx);
  238.       /* If we're already overflowing ... */
  239.       if (ctx->err_stack || ctx->too_many)
                                   ^
  240.           ctx->err_stack++;
  241.       /* (Try to) get a new frame pointer */

crypto/bn/bn_ctx.c:242:15: 
  240.           ctx->err_stack++;
  241.       /* (Try to) get a new frame pointer */
  242. >     else if (!BN_STACK_push(&ctx->stack, ctx->used)) {
  243.           BNerr(BN_F_BN_CTX_START, BN_R_TOO_MANY_TEMPORARY_VARIABLES);
  244.           ctx->err_stack++;

crypto/bn/bn_ctx.c:306:1: start of procedure BN_STACK_push()
    304.   
    305.   
    306. > static int BN_STACK_push(BN_STACK *st, unsigned int idx)
    307.   {
    308.       if (st->depth == st->size) {

crypto/bn/bn_ctx.c:308:9: Taking true branch
    306.   static int BN_STACK_push(BN_STACK *st, unsigned int idx)
    307.   {
    308.       if (st->depth == st->size) {
                   ^
    309.           /* Need to expand */
    310.           unsigned int newsize =

crypto/bn/bn_ctx.c:311:13: Condition is true
    309.           /* Need to expand */
    310.           unsigned int newsize =
    311.               st->size ? (st->size * 3 / 2) : BN_CTX_START_FRAMES;
                       ^
    312.           unsigned int *newitems = OPENSSL_malloc(sizeof(*newitems) * newsize);
    313.           if (newitems == NULL)

crypto/bn/bn_ctx.c:310:9: 
    308.       if (st->depth == st->size) {
    309.           /* Need to expand */
    310. >         unsigned int newsize =
    311.               st->size ? (st->size * 3 / 2) : BN_CTX_START_FRAMES;
    312.           unsigned int *newitems = OPENSSL_malloc(sizeof(*newitems) * newsize);

crypto/bn/bn_ctx.c:312:9: 
    310.           unsigned int newsize =
    311.               st->size ? (st->size * 3 / 2) : BN_CTX_START_FRAMES;
    312. >         unsigned int *newitems = OPENSSL_malloc(sizeof(*newitems) * newsize);
    313.           if (newitems == NULL)
    314.               return 0;

crypto/mem.c:119:1: start of procedure CRYPTO_malloc()
      117.   }
      118.   
      119. > void *CRYPTO_malloc(size_t num, const char *file, int line)
      120.   {
      121.       void *ret = NULL;

crypto/mem.c:121:5: 
      119.   void *CRYPTO_malloc(size_t num, const char *file, int line)
      120.   {
      121. >     void *ret = NULL;
      122.   
      123.       if (num <= 0)

crypto/mem.c:123:9: Taking false branch
      121.       void *ret = NULL;
      122.   
      123.       if (num <= 0)
                     ^
      124.           return NULL;
      125.   

crypto/mem.c:126:5: 
      124.           return NULL;
      125.   
      126. >     allow_customize = 0;
      127.   #ifndef OPENSSL_NO_CRYPTO_MDEBUG
      128.       if (call_malloc_debug) {

crypto/mem.c:136:5: 
      134.       }
      135.   #else
      136. >     (void)file;
      137.       (void)line;
      138.       ret = malloc(num);

crypto/mem.c:137:5: 
      135.   #else
      136.       (void)file;
      137. >     (void)line;
      138.       ret = malloc(num);
      139.   #endif

crypto/mem.c:138:5: 
      136.       (void)file;
      137.       (void)line;
      138. >     ret = malloc(num);
      139.   #endif
      140.   

crypto/mem.c:153:5: 
      151.   #endif
      152.   
      153. >     return ret;
      154.   }
      155.   

crypto/mem.c:154:1: return from a call to CRYPTO_malloc
      152.   
      153.       return ret;
      154. > }
      155.   
      156.   void *CRYPTO_zalloc(size_t num, const char *file, int line)

crypto/bn/bn_ctx.c:313:13: Taking false branch
    311.               st->size ? (st->size * 3 / 2) : BN_CTX_START_FRAMES;
    312.           unsigned int *newitems = OPENSSL_malloc(sizeof(*newitems) * newsize);
    313.           if (newitems == NULL)
                       ^
    314.               return 0;
    315.           if (st->depth)

crypto/bn/bn_ctx.c:315:13: Taking true branch
    313.           if (newitems == NULL)
    314.               return 0;
    315.           if (st->depth)
                       ^
    316.               memcpy(newitems, st->indexes, sizeof(*newitems) * st->depth);
    317.           OPENSSL_free(st->indexes);

crypto/bn/bn_ctx.c:316:13: 
    314.               return 0;
    315.           if (st->depth)
    316. >             memcpy(newitems, st->indexes, sizeof(*newitems) * st->depth);
    317.           OPENSSL_free(st->indexes);
    318.           st->indexes = newitems;

crypto/bn/bn_ctx.c:317:9: 
    315.           if (st->depth)
    316.               memcpy(newitems, st->indexes, sizeof(*newitems) * st->depth);
    317. >         OPENSSL_free(st->indexes);
    318.           st->indexes = newitems;
    319.           st->size = newsize;

crypto/mem.c:233:1: start of procedure CRYPTO_free()
      231.   }
      232.   
      233. > void CRYPTO_free(void *str)
      234.   {
      235.   #ifndef OPENSSL_NO_CRYPTO_MDEBUG

crypto/mem.c:244:5: 
      242.       }
      243.   #else
      244. >     free(str);
      245.   #endif
      246.   }

crypto/mem.c:246:1: return from a call to CRYPTO_free
      244.       free(str);
      245.   #endif
      246. > }
      247.   
      248.   void CRYPTO_clear_free(void *str, size_t num)

crypto/bn/bn_ctx.c:318:9: 
    316.               memcpy(newitems, st->indexes, sizeof(*newitems) * st->depth);
    317.           OPENSSL_free(st->indexes);
    318. >         st->indexes = newitems;
    319.           st->size = newsize;
    320.       }

crypto/bn/bn_ctx.c:319:9: 
    317.           OPENSSL_free(st->indexes);
    318.           st->indexes = newitems;
    319. >         st->size = newsize;
    320.       }
    321.       st->indexes[(st->depth)++] = idx;

crypto/bn/bn_ctx.c:321:5: 
    319.           st->size = newsize;
    320.       }
    321. >     st->indexes[(st->depth)++] = idx;
    322.       return 1;
    323.   }

crypto/bn/bn_ctx.c:322:5: 
    320.       }
    321.       st->indexes[(st->depth)++] = idx;
    322. >     return 1;
    323.   }
    324.   

crypto/bn/bn_ctx.c:323:1: return from a call to BN_STACK_push
    321.       st->indexes[(st->depth)++] = idx;
    322.       return 1;
    323. > }
    324.   
    325.   static unsigned int BN_STACK_pop(BN_STACK *st)

crypto/bn/bn_ctx.c:242:15: Taking false branch
  240.           ctx->err_stack++;
  241.       /* (Try to) get a new frame pointer */
  242.       else if (!BN_STACK_push(&ctx->stack, ctx->used)) {
                       ^
  243.           BNerr(BN_F_BN_CTX_START, BN_R_TOO_MANY_TEMPORARY_VARIABLES);
  244.           ctx->err_stack++;

crypto/bn/bn_ctx.c:239:5: 
  237.       CTXDBG_ENTRY("BN_CTX_start", ctx);
  238.       /* If we're already overflowing ... */
  239. >     if (ctx->err_stack || ctx->too_many)
  240.           ctx->err_stack++;
  241.       /* (Try to) get a new frame pointer */

crypto/bn/bn_ctx.c:247:1: return from a call to BN_CTX_start
  245.       }
  246.       CTXDBG_EXIT(ctx);
  247. > }
  248.   
  249.   void BN_CTX_end(BN_CTX *ctx)

crypto/bn/bn_mod.c:189:9: 
187.   
188.       BN_CTX_start(ctx);
189. >     if ((t = BN_CTX_get(ctx)) == NULL)
190.           goto err;
191.       if (a == b) {

crypto/bn/bn_ctx.c:266:1: start of procedure BN_CTX_get()
  264.   }
  265.   
  266. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  267.   {
  268.       BIGNUM *ret;

crypto/bn/bn_ctx.c:271:9: Taking false branch
  269.   
  270.       CTXDBG_ENTRY("BN_CTX_get", ctx);
  271.       if (ctx->err_stack || ctx->too_many)
                 ^
  272.           return NULL;
  273.       if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {

crypto/bn/bn_ctx.c:271:27: Taking false branch
  269.   
  270.       CTXDBG_ENTRY("BN_CTX_get", ctx);
  271.       if (ctx->err_stack || ctx->too_many)
                                   ^
  272.           return NULL;
  273.       if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {

crypto/bn/bn_ctx.c:273:9: Taking false branch
  271.       if (ctx->err_stack || ctx->too_many)
  272.           return NULL;
  273.       if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {
                 ^
  274.           /*
  275.            * Setting too_many prevents repeated "get" attempts from cluttering

crypto/bn/bn_ctx.c:283:5: 
  281.       }
  282.       /* OK, make sure the returned bignum is "zero" */
  283. >     BN_zero(ret);
  284.       ctx->used++;
  285.       CTXDBG_RET(ctx, ret);

crypto/bn/bn_lib.c:529:1: start of procedure BN_set_word()
    527.   }
    528.   
    529. > int BN_set_word(BIGNUM *a, BN_ULONG w)
    530.   {
    531.       bn_check_top(a);

crypto/bn/bn_lib.c:532:9: Condition is true
    530.   {
    531.       bn_check_top(a);
    532.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    533.           return (0);
    534.       a->neg = 0;

crypto/bn/bn_lib.c:532:9: Taking false branch
    530.   {
    531.       bn_check_top(a);
    532.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    533.           return (0);
    534.       a->neg = 0;

crypto/bn/bn_lib.c:534:5: 
    532.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
    533.           return (0);
    534. >     a->neg = 0;
    535.       a->d[0] = w;
    536.       a->top = (w ? 1 : 0);

crypto/bn/bn_lib.c:535:5: 
    533.           return (0);
    534.       a->neg = 0;
    535. >     a->d[0] = w;
    536.       a->top = (w ? 1 : 0);
    537.       bn_check_top(a);

crypto/bn/bn_lib.c:536:15: Condition is false
    534.       a->neg = 0;
    535.       a->d[0] = w;
    536.       a->top = (w ? 1 : 0);
                         ^
    537.       bn_check_top(a);
    538.       return (1);

crypto/bn/bn_lib.c:536:5: 
    534.       a->neg = 0;
    535.       a->d[0] = w;
    536. >     a->top = (w ? 1 : 0);
    537.       bn_check_top(a);
    538.       return (1);

crypto/bn/bn_lib.c:538:5: 
    536.       a->top = (w ? 1 : 0);
    537.       bn_check_top(a);
    538. >     return (1);
    539.   }
    540.   

crypto/bn/bn_lib.c:539:1: return from a call to BN_set_word
    537.       bn_check_top(a);
    538.       return (1);
    539. > }
    540.   
    541.   BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)

crypto/bn/bn_ctx.c:284:5: 
  282.       /* OK, make sure the returned bignum is "zero" */
  283.       BN_zero(ret);
  284. >     ctx->used++;
  285.       CTXDBG_RET(ctx, ret);
  286.       return ret;

crypto/bn/bn_ctx.c:286:5: 
  284.       ctx->used++;
  285.       CTXDBG_RET(ctx, ret);
  286. >     return ret;
  287.   }
  288.   

crypto/bn/bn_ctx.c:287:1: return from a call to BN_CTX_get
  285.       CTXDBG_RET(ctx, ret);
  286.       return ret;
  287. > }
  288.   
  289.   /************/

crypto/bn/bn_mod.c:189:9: Taking false branch
187.   
188.       BN_CTX_start(ctx);
189.       if ((t = BN_CTX_get(ctx)) == NULL)
               ^
190.           goto err;
191.       if (a == b) {

crypto/bn/bn_mod.c:191:9: Taking true branch
189.       if ((t = BN_CTX_get(ctx)) == NULL)
190.           goto err;
191.       if (a == b) {
               ^
192.           if (!BN_sqr(t, a, ctx))
193.               goto err;

crypto/bn/bn_mod.c:192:14: Skipping BN_sqr(): empty list of specs
190.           goto err;
191.       if (a == b) {
192.           if (!BN_sqr(t, a, ctx))
                    ^
193.               goto err;
194.       } else {

int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,
               BN_CTX *ctx)
{
    BIGNUM *t;
    int ret = 0;
    bn_check_top(a);
    bn_check_top(b);
    bn_check_top(m);
    BN_CTX_start(ctx);
    if ((t = BN_CTX_get(ctx)) == NULL)
        goto err;
    if (a == b) {
        if (!BN_sqr(t, a, ctx))
            goto err;
    } else {
        if (!BN_mul(t, a, b, ctx))
            goto err;
    }
    if (!BN_nnmod(r, t, m, ctx))
        goto err;
    bn_check_top(r);
    ret = 1;
 err:
    BN_CTX_end(ctx);
    return (ret);
}
['int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m,\n               BN_CTX *ctx)\n{\n    BIGNUM *t;\n    int ret = 0;\n    bn_check_top(a);\n    bn_check_top(b);\n    bn_check_top(m);\n    BN_CTX_start(ctx);\n    if ((t = BN_CTX_get(ctx)) == NULL)\n        goto err;\n    if (a == b) {\n        if (!BN_sqr(t, a, ctx))\n            goto err;\n    } else {\n        if (!BN_mul(t, a, b, ctx))\n            goto err;\n    }\n    if (!BN_nnmod(r, t, m, ctx))\n        goto err;\n    bn_check_top(r);\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return (ret);\n}', 'void BN_CTX_start(BN_CTX *ctx)\n{\n    CTXDBG_ENTRY("BN_CTX_start", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        ctx->err_stack++;\n    else if (!BN_STACK_push(&ctx->stack, ctx->used)) {\n        BNerr(BN_F_BN_CTX_START, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        ctx->err_stack++;\n    }\n    CTXDBG_EXIT(ctx);\n}', 'static int BN_STACK_push(BN_STACK *st, unsigned int idx)\n{\n    if (st->depth == st->size) {\n        unsigned int newsize =\n            st->size ? (st->size * 3 / 2) : BN_CTX_START_FRAMES;\n        unsigned int *newitems = OPENSSL_malloc(sizeof(*newitems) * newsize);\n        if (newitems == NULL)\n            return 0;\n        if (st->depth)\n            memcpy(newitems, st->indexes, sizeof(*newitems) * st->depth);\n        OPENSSL_free(st->indexes);\n        st->indexes = newitems;\n        st->size = newsize;\n    }\n    st->indexes[(st->depth)++] = idx;\n    return 1;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (num <= 0)\n        return NULL;\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    (void)file;\n    (void)line;\n    ret = malloc(num);\n#endif\n#ifndef OPENSSL_CPUID_OBJ\n    if (ret && (num > 2048)) {\n        extern unsigned char cleanse_ctr;\n        ((unsigned char *)ret)[0] = cleanse_ctr;\n    }\n#endif\n    return ret;\n}', 'void CRYPTO_free(void *str)\n{\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_free(str, 0);\n        free(str);\n        CRYPTO_mem_debug_free(str, 1);\n    } else {\n        free(str);\n    }\n#else\n    free(str);\n#endif\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG_ENTRY("BN_CTX_get", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        return NULL;\n    if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {\n        ctx->too_many = 1;\n        BNerr(BN_F_BN_CTX_GET, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        return NULL;\n    }\n    BN_zero(ret);\n    ctx->used++;\n    CTXDBG_RET(ctx, ret);\n    return ret;\n}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n{\n    bn_check_top(a);\n    if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)\n        return (0);\n    a->neg = 0;\n    a->d[0] = w;\n    a->top = (w ? 1 : 0);\n    bn_check_top(a);\n    return (1);\n}']