crypto/ec/ec2_smpl.c:768: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 23 steps of the trace


crypto/ec/ec2_smpl.c:676:1: Parameter `ctx->pool.used`
674.    * Uses algorithm A.10.2 of IEEE P1363.
675.    */
676. > int ec_GF2m_simple_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
677.   	{
678.   	BN_CTX *new_ctx = NULL;

crypto/ec/ec2_smpl.c:702:7: Call
700.   
701.   	BN_CTX_start(ctx);
702.   	x0 = BN_CTX_get(ctx);
             ^
703.   	y0 = BN_CTX_get(ctx);
704.   	x1 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:703:7: Call
701.   	BN_CTX_start(ctx);
702.   	x0 = BN_CTX_get(ctx);
703.   	y0 = BN_CTX_get(ctx);
             ^
704.   	x1 = BN_CTX_get(ctx);
705.   	y1 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:704:7: Call
702.   	x0 = BN_CTX_get(ctx);
703.   	y0 = BN_CTX_get(ctx);
704.   	x1 = BN_CTX_get(ctx);
             ^
705.   	y1 = BN_CTX_get(ctx);
706.   	x2 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:705:7: Call
703.   	y0 = BN_CTX_get(ctx);
704.   	x1 = BN_CTX_get(ctx);
705.   	y1 = BN_CTX_get(ctx);
             ^
706.   	x2 = BN_CTX_get(ctx);
707.   	y2 = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:706:7: Call
704.   	x1 = BN_CTX_get(ctx);
705.   	y1 = BN_CTX_get(ctx);
706.   	x2 = BN_CTX_get(ctx);
             ^
707.   	y2 = BN_CTX_get(ctx);
708.   	s = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:707:7: Call
705.   	y1 = BN_CTX_get(ctx);
706.   	x2 = BN_CTX_get(ctx);
707.   	y2 = BN_CTX_get(ctx);
             ^
708.   	s = BN_CTX_get(ctx);
709.   	t = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:708:6: Call
706.   	x2 = BN_CTX_get(ctx);
707.   	y2 = BN_CTX_get(ctx);
708.   	s = BN_CTX_get(ctx);
            ^
709.   	t = BN_CTX_get(ctx);
710.   	if (t == NULL) goto err;

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:709:6: Call
707.   	y2 = BN_CTX_get(ctx);
708.   	s = BN_CTX_get(ctx);
709.   	t = BN_CTX_get(ctx);
            ^
710.   	if (t == NULL) goto err;
711.   

crypto/bn/bn_ctx.c:288:1: Parameter `ctx->pool.used`
  286.   	}
  287.   
  288. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  289.   	{
  290.   	BIGNUM *ret;

crypto/ec/ec2_smpl.c:768:2: Call
766.   
767.    err:
768.   	BN_CTX_end(ctx);
        ^
769.   	if (new_ctx != NULL)
770.   		BN_CTX_free(new_ctx);

crypto/bn/bn_ctx.c:270:1: Parameter `ctx->pool.used`
  268.   	}
  269.   
  270. > void BN_CTX_end(BN_CTX *ctx)
  271.   	{
  272.   	CTXDBG_ENTRY("BN_CTX_end", ctx);

crypto/bn/bn_ctx.c:280:4: Call
  278.   		/* Does this stack frame have anything to release? */
  279.   		if(fp < ctx->used)
  280.   			BN_POOL_release(&ctx->pool, ctx->used - fp);
            ^
  281.   		ctx->used = fp;
  282.   		/* Unjam "too_many" in case "get" had failed */

crypto/bn/bn_ctx.c:438:1: <LHS trace>
436.   	}
437.   
438. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
439.   	{
440.   	unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:438:1: Parameter `p->used`
    436.   	}
    437.   
    438. > static void BN_POOL_release(BN_POOL *p, unsigned int num)
    439.   	{
    440.   	unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;

crypto/bn/bn_ctx.c:440:2: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    438.   static void BN_POOL_release(BN_POOL *p, unsigned int num)
    439.   	{
    440.   	unsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;
            ^
    441.   	p->used -= num;
    442.   	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_GF2m_simple_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)\n\t{\n\tBN_CTX *new_ctx = NULL;\n\tBIGNUM *x0, *y0, *x1, *y1, *x2, *y2, *s, *t;\n\tint ret = 0;\n\tif (EC_POINT_is_at_infinity(group, a))\n\t\t{\n\t\tif (!EC_POINT_copy(r, b)) return 0;\n\t\treturn 1;\n\t\t}\n\tif (EC_POINT_is_at_infinity(group, b))\n\t\t{\n\t\tif (!EC_POINT_copy(r, a)) return 0;\n\t\treturn 1;\n\t\t}\n\tif (ctx == NULL)\n\t\t{\n\t\tctx = new_ctx = BN_CTX_new();\n\t\tif (ctx == NULL)\n\t\t\treturn 0;\n\t\t}\n\tBN_CTX_start(ctx);\n\tx0 = BN_CTX_get(ctx);\n\ty0 = BN_CTX_get(ctx);\n\tx1 = BN_CTX_get(ctx);\n\ty1 = BN_CTX_get(ctx);\n\tx2 = BN_CTX_get(ctx);\n\ty2 = BN_CTX_get(ctx);\n\ts = BN_CTX_get(ctx);\n\tt = BN_CTX_get(ctx);\n\tif (t == NULL) goto err;\n\tif (a->Z_is_one)\n\t\t{\n\t\tif (!BN_copy(x0, &a->X)) goto err;\n\t\tif (!BN_copy(y0, &a->Y)) goto err;\n\t\t}\n\telse\n\t\t{\n\t\tif (!EC_POINT_get_affine_coordinates_GF2m(group, a, x0, y0, ctx)) goto err;\n\t\t}\n\tif (b->Z_is_one)\n\t\t{\n\t\tif (!BN_copy(x1, &b->X)) goto err;\n\t\tif (!BN_copy(y1, &b->Y)) goto err;\n\t\t}\n\telse\n\t\t{\n\t\tif (!EC_POINT_get_affine_coordinates_GF2m(group, b, x1, y1, ctx)) goto err;\n\t\t}\n\tif (BN_GF2m_cmp(x0, x1))\n\t\t{\n\t\tif (!BN_GF2m_add(t, x0, x1)) goto err;\n\t\tif (!BN_GF2m_add(s, y0, y1)) goto err;\n\t\tif (!group->meth->field_div(group, s, s, t, ctx)) goto err;\n\t\tif (!group->meth->field_sqr(group, x2, s, ctx)) goto err;\n\t\tif (!BN_GF2m_add(x2, x2, &group->a)) goto err;\n\t\tif (!BN_GF2m_add(x2, x2, s)) goto err;\n\t\tif (!BN_GF2m_add(x2, x2, t)) goto err;\n\t\t}\n\telse\n\t\t{\n\t\tif (BN_GF2m_cmp(y0, y1) || BN_is_zero(x1))\n\t\t\t{\n\t\t\tif (!EC_POINT_set_to_infinity(group, r)) goto err;\n\t\t\tret = 1;\n\t\t\tgoto err;\n\t\t\t}\n\t\tif (!group->meth->field_div(group, s, y1, x1, ctx)) goto err;\n\t\tif (!BN_GF2m_add(s, s, x1)) goto err;\n\t\tif (!group->meth->field_sqr(group, x2, s, ctx)) goto err;\n\t\tif (!BN_GF2m_add(x2, x2, s)) goto err;\n\t\tif (!BN_GF2m_add(x2, x2, &group->a)) goto err;\n\t\t}\n\tif (!BN_GF2m_add(y2, x1, x2)) goto err;\n\tif (!group->meth->field_mul(group, y2, y2, s, ctx)) goto err;\n\tif (!BN_GF2m_add(y2, y2, x2)) goto err;\n\tif (!BN_GF2m_add(y2, y2, y1)) goto err;\n\tif (!EC_POINT_set_affine_coordinates_GF2m(group, r, x2, y2, ctx)) goto err;\n\tret = 1;\n err:\n\tBN_CTX_end(ctx);\n\tif (new_ctx != NULL)\n\t\tBN_CTX_free(new_ctx);\n\treturn ret;\n\t}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n\t{\n\tBIGNUM *ret;\n\tCTXDBG_ENTRY("BN_CTX_get", ctx);\n\tif(ctx->err_stack || ctx->too_many) return NULL;\n\tif((ret = BN_POOL_get(&ctx->pool)) == NULL)\n\t\t{\n\t\tctx->too_many = 1;\n\t\tBNerr(BN_F_BN_CTX_GET,BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n\t\treturn NULL;\n\t\t}\n\tBN_zero(ret);\n\tctx->used++;\n\tCTXDBG_RET(ctx, ret);\n\treturn ret;\n\t}', 'void BN_CTX_end(BN_CTX *ctx)\n\t{\n\tCTXDBG_ENTRY("BN_CTX_end", ctx);\n\tif(ctx->err_stack)\n\t\tctx->err_stack--;\n\telse\n\t\t{\n\t\tunsigned int fp = BN_STACK_pop(&ctx->stack);\n\t\tif(fp < ctx->used)\n\t\t\tBN_POOL_release(&ctx->pool, ctx->used - fp);\n\t\tctx->used = fp;\n\t\tctx->too_many = 0;\n\t\t}\n\tCTXDBG_EXIT(ctx);\n\t}', 'static void BN_POOL_release(BN_POOL *p, unsigned int num)\n\t{\n\tunsigned int offset = (p->used - 1) % BN_CTX_POOL_SIZE;\n\tp->used -= num;\n\twhile(num--)\n\t\t{\n\t\tbn_check_top(p->current->vals + offset);\n\t\tif(!offset)\n\t\t\t{\n\t\t\toffset = BN_CTX_POOL_SIZE - 1;\n\t\t\tp->current = p->current->prev;\n\t\t\t}\n\t\telse\n\t\t\toffset--;\n\t\t}\n\t}']