crypto/ec/ecp_smpl.c:1102: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 15 steps of the trace


crypto/ec/ecp_smpl.c:1004:1: Parameter `ctx->pool.used`
1002.   }
1003.   
1004. > int ec_GFp_simple_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
1005.                                 BN_CTX *ctx)
1006.   {

crypto/ec/ecp_smpl.c:1029:10: Call
1027.   
1028.       BN_CTX_start(ctx);
1029.       rh = BN_CTX_get(ctx);
                 ^
1030.       tmp = BN_CTX_get(ctx);
1031.       Z4 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:284:1: Parameter `ctx->pool.used`
  282.   }
  283.   
  284. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  285.   {
  286.       BIGNUM *ret;

crypto/ec/ecp_smpl.c:1030:11: Call
1028.       BN_CTX_start(ctx);
1029.       rh = BN_CTX_get(ctx);
1030.       tmp = BN_CTX_get(ctx);
                  ^
1031.       Z4 = BN_CTX_get(ctx);
1032.       Z6 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:284:1: Parameter `ctx->pool.used`
  282.   }
  283.   
  284. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  285.   {
  286.       BIGNUM *ret;

crypto/ec/ecp_smpl.c:1031:10: Call
1029.       rh = BN_CTX_get(ctx);
1030.       tmp = BN_CTX_get(ctx);
1031.       Z4 = BN_CTX_get(ctx);
                 ^
1032.       Z6 = BN_CTX_get(ctx);
1033.       if (Z6 == NULL)

crypto/bn/bn_ctx.c:284:1: Parameter `ctx->pool.used`
  282.   }
  283.   
  284. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  285.   {
  286.       BIGNUM *ret;

crypto/ec/ecp_smpl.c:1032:10: Call
1030.       tmp = BN_CTX_get(ctx);
1031.       Z4 = BN_CTX_get(ctx);
1032.       Z6 = BN_CTX_get(ctx);
                 ^
1033.       if (Z6 == NULL)
1034.           goto err;

crypto/bn/bn_ctx.c:284:1: Parameter `ctx->pool.used`
  282.   }
  283.   
  284. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  285.   {
  286.       BIGNUM *ret;

crypto/ec/ecp_smpl.c:1102:5: Call
1100.   
1101.    err:
1102.       BN_CTX_end(ctx);
            ^
1103.       if (new_ctx != NULL)
1104.           BN_CTX_free(new_ctx);

crypto/bn/bn_ctx.c:267:1: Parameter `ctx->pool.used`
  265.   }
  266.   
  267. > void BN_CTX_end(BN_CTX *ctx)
  268.   {
  269.       CTXDBG_ENTRY("BN_CTX_end", ctx);

crypto/bn/bn_ctx.c:276:13: Call
  274.           /* Does this stack frame have anything to release? */
  275.           if (fp < ctx->used)
  276.               BN_POOL_release(&ctx->pool, ctx->used - fp);
                     ^
  277.           ctx->used = fp;
  278.           /* Unjam "too_many" in case "get" had failed */

crypto/bn/bn_ctx.c:435:1: <LHS trace>
433.   }
434.   
435. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
436.   {
437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:435:1: Parameter `p->used`
    433.   }
    434.   
    435. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
    436.   {
    437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:437:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    435.   static void BN_POOL_release(BN_POOL *p, unsigned int num)
    436.   {
    437.       unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;
               ^
    438.       p->used -= num;
    439.       while (num--) {

static void BN_POOL_release(BN_POOL *p, unsigned int num)
{
    unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;
    p->used -= num;
    while (num--) {
        bn_check_top(p->current->vals + offset);
        if (!offset) {
            offset = BN_CTX_POOL_SIZE - 1;
            p->current = p->current->prev;
        } else
            offset--;
    }
}
['int ec_GFp_simple_is_on_curve(const EC_GROUP *group, const EC_POINT *point,\n                              BN_CTX *ctx)\n{\n    int (*field_mul) (const EC_GROUP *, BIGNUM *, const BIGNUM *,\n                      const BIGNUM *, BN_CTX *);\n    int (*field_sqr) (const EC_GROUP *, BIGNUM *, const BIGNUM *, BN_CTX *);\n    const BIGNUM *p;\n    BN_CTX *new_ctx = NULL;\n    BIGNUM *rh, *tmp, *Z4, *Z6;\n    int ret = -1;\n    if (EC_POINT_is_at_infinity(group, point))\n        return 1;\n    field_mul = group->meth->field_mul;\n    field_sqr = group->meth->field_sqr;\n    p = group->field;\n    if (ctx == NULL) {\n        ctx = new_ctx = BN_CTX_new();\n        if (ctx == NULL)\n            return -1;\n    }\n    BN_CTX_start(ctx);\n    rh = BN_CTX_get(ctx);\n    tmp = BN_CTX_get(ctx);\n    Z4 = BN_CTX_get(ctx);\n    Z6 = BN_CTX_get(ctx);\n    if (Z6 == NULL)\n        goto err;\n    if (!field_sqr(group, rh, point->X, ctx))\n        goto err;\n    if (!point->Z_is_one) {\n        if (!field_sqr(group, tmp, point->Z, ctx))\n            goto err;\n        if (!field_sqr(group, Z4, tmp, ctx))\n            goto err;\n        if (!field_mul(group, Z6, Z4, tmp, ctx))\n            goto err;\n        if (group->a_is_minus3) {\n            if (!BN_mod_lshift1_quick(tmp, Z4, p))\n                goto err;\n            if (!BN_mod_add_quick(tmp, tmp, Z4, p))\n                goto err;\n            if (!BN_mod_sub_quick(rh, rh, tmp, p))\n                goto err;\n            if (!field_mul(group, rh, rh, point->X, ctx))\n                goto err;\n        } else {\n            if (!field_mul(group, tmp, Z4, group->a, ctx))\n                goto err;\n            if (!BN_mod_add_quick(rh, rh, tmp, p))\n                goto err;\n            if (!field_mul(group, rh, rh, point->X, ctx))\n                goto err;\n        }\n        if (!field_mul(group, tmp, group->b, Z6, ctx))\n            goto err;\n        if (!BN_mod_add_quick(rh, rh, tmp, p))\n            goto err;\n    } else {\n        if (!BN_mod_add_quick(rh, rh, group->a, p))\n            goto err;\n        if (!field_mul(group, rh, rh, point->X, ctx))\n            goto err;\n        if (!BN_mod_add_quick(rh, rh, group->b, p))\n            goto err;\n    }\n    if (!field_sqr(group, tmp, point->Y, ctx))\n        goto err;\n    ret = (0 == BN_ucmp(tmp, rh));\n err:\n    BN_CTX_end(ctx);\n    if (new_ctx != NULL)\n        BN_CTX_free(new_ctx);\n    return ret;\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)) == 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}', 'void BN_CTX_end(BN_CTX *ctx)\n{\n    CTXDBG_ENTRY("BN_CTX_end", ctx);\n    if (ctx->err_stack)\n        ctx->err_stack--;\n    else {\n        unsigned int fp = BN_STACK_pop(&ctx->stack);\n        if (fp < ctx->used)\n            BN_POOL_release(&ctx->pool, ctx->used - fp);\n        ctx->used = fp;\n        ctx->too_many = 0;\n    }\n    CTXDBG_EXIT(ctx);\n}', 'static void BN_POOL_release(BN_POOL *p, unsigned int num)\n{\n    unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;\n    p->used -= num;\n    while (num--) {\n        bn_check_top(p->current->vals + offset);\n        if (!offset) {\n            offset = BN_CTX_POOL_SIZE - 1;\n            p->current = p->current->prev;\n        } else\n            offset--;\n    }\n}']