crypto/ec/ec2_oct.c:402: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 9 steps of the trace


crypto/ec/ec2_oct.c:297:1: Parameter `ctx->stack.depth`
295.    * Note that the simple implementation only uses affine coordinates.
296.    */
297. > int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
298.   	const unsigned char *buf, size_t len, BN_CTX *ctx)
299.   	{

crypto/ec/ec2_oct.c:355:2: Call
353.   		}
354.   
355.   	BN_CTX_start(ctx);
        ^
356.   	x = BN_CTX_get(ctx);
357.   	y = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:257:1: Parameter `ctx->stack.depth`
  255.   	}
  256.   
  257. > void BN_CTX_start(BN_CTX *ctx)
  258.   	{
  259.   	CTXDBG_ENTRY("BN_CTX_start", ctx);

crypto/ec/ec2_oct.c:402:2: Call
400.   	
401.    err:
402.   	BN_CTX_end(ctx);
        ^
403.   	if (new_ctx != NULL)
404.   		BN_CTX_free(new_ctx);

crypto/bn/bn_ctx.c:272:1: Parameter `ctx->stack.depth`
  270.   	}
  271.   
  272. > void BN_CTX_end(BN_CTX *ctx)
  273.   	{
  274.   	CTXDBG_ENTRY("BN_CTX_end", ctx);

crypto/bn/bn_ctx.c:279:21: Call
  277.   	else
  278.   		{
  279.   		unsigned int fp = BN_STACK_pop(&ctx->stack);
                             ^
  280.   		/* Does this stack frame have anything to release? */
  281.   		if(fp < ctx->used)

crypto/bn/bn_ctx.c:353:1: <LHS trace>
351.   	}
352.   
353. > static unsigned int BN_STACK_pop(BN_STACK *st)
354.   	{
355.   	return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:353:1: Parameter `st->depth`
    351.   	}
    352.   
    353. > static unsigned int BN_STACK_pop(BN_STACK *st)
    354.   	{
    355.   	return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:355:9: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    353.   static unsigned int BN_STACK_pop(BN_STACK *st)
    354.   	{
    355.   	return st->indexes[--(st->depth)];
                   ^
    356.   	}
    357.   

static unsigned int BN_STACK_pop(BN_STACK *st)
	{
	return st->indexes[--(st->depth)];
	}
['int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,\n\tconst unsigned char *buf, size_t len, BN_CTX *ctx)\n\t{\n\tpoint_conversion_form_t form;\n\tint y_bit;\n\tBN_CTX *new_ctx = NULL;\n\tBIGNUM *x, *y, *yxi;\n\tsize_t field_len, enc_len;\n\tint ret = 0;\n\tif (len == 0)\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_BUFFER_TOO_SMALL);\n\t\treturn 0;\n\t\t}\n\tform = buf[0];\n\ty_bit = form & 1;\n\tform = form & ~1U;\n\tif ((form != 0)\t&& (form != POINT_CONVERSION_COMPRESSED)\n\t\t&& (form != POINT_CONVERSION_UNCOMPRESSED)\n\t\t&& (form != POINT_CONVERSION_HYBRID))\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\treturn 0;\n\t\t}\n\tif ((form == 0 || form == POINT_CONVERSION_UNCOMPRESSED) && y_bit)\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\treturn 0;\n\t\t}\n\tif (form == 0)\n\t\t{\n\t\tif (len != 1)\n\t\t\t{\n\t\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\t\treturn 0;\n\t\t\t}\n\t\treturn EC_POINT_set_to_infinity(group, point);\n\t\t}\n\tfield_len = (EC_GROUP_get_degree(group) + 7) / 8;\n\tenc_len = (form == POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2*field_len;\n\tif (len != enc_len)\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\treturn 0;\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\tx = BN_CTX_get(ctx);\n\ty = BN_CTX_get(ctx);\n\tyxi = BN_CTX_get(ctx);\n\tif (yxi == NULL) goto err;\n\tif (!BN_bin2bn(buf + 1, field_len, x)) goto err;\n\tif (BN_ucmp(x, &group->field) >= 0)\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\tgoto err;\n\t\t}\n\tif (form == POINT_CONVERSION_COMPRESSED)\n\t\t{\n\t\tif (!EC_POINT_set_compressed_coordinates_GF2m(group, point, x, y_bit, ctx)) goto err;\n\t\t}\n\telse\n\t\t{\n\t\tif (!BN_bin2bn(buf + 1 + field_len, field_len, y)) goto err;\n\t\tif (BN_ucmp(y, &group->field) >= 0)\n\t\t\t{\n\t\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\t\tgoto err;\n\t\t\t}\n\t\tif (form == POINT_CONVERSION_HYBRID)\n\t\t\t{\n\t\t\tif (!group->meth->field_div(group, yxi, y, x, ctx)) goto err;\n\t\t\tif (y_bit != BN_is_odd(yxi))\n\t\t\t\t{\n\t\t\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);\n\t\t\t\tgoto err;\n\t\t\t\t}\n\t\t\t}\n\t\tif (!EC_POINT_set_affine_coordinates_GF2m(group, point, x, y, ctx)) goto err;\n\t\t}\n\tif (!EC_POINT_is_on_curve(group, point, ctx))\n\t\t{\n\t\tECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_POINT_IS_NOT_ON_CURVE);\n\t\tgoto err;\n\t\t}\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}', 'void BN_CTX_start(BN_CTX *ctx)\n\t{\n\tCTXDBG_ENTRY("BN_CTX_start", ctx);\n\tif(ctx->err_stack || ctx->too_many)\n\t\tctx->err_stack++;\n\telse if(!BN_STACK_push(&ctx->stack, ctx->used))\n\t\t{\n\t\tBNerr(BN_F_BN_CTX_START,BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n\t\tctx->err_stack++;\n\t\t}\n\tCTXDBG_EXIT(ctx);\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 unsigned int BN_STACK_pop(BN_STACK *st)\n\t{\n\treturn st->indexes[--(st->depth)];\n\t}']