engines/e_cswift.c:800: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 8 steps of the trace


engines/e_cswift.c:720:2: Call
718.   	acquired = 1;
719.   	/* Prepare the params */
720.   	BN_CTX_start(ctx);
        ^
721.   	dsa_p = BN_CTX_get(ctx);
722.   	dsa_q = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:254:1: Parameter `ctx->stack.depth`
  252.   	}
  253.   
  254. > void BN_CTX_start(BN_CTX *ctx)
  255.   	{
  256.   	CTXDBG_ENTRY("BN_CTX_start", ctx);

engines/e_cswift.c:800:3: Call
798.   	if(ctx)
799.   		{
800.   		BN_CTX_end(ctx);
         ^
801.   		BN_CTX_free(ctx);
802.   		}

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

crypto/bn/bn_ctx.c:277:21: Call
  275.   	else
  276.   		{
  277.   		unsigned int fp = BN_STACK_pop(&ctx->stack);
                             ^
  278.   		/* Does this stack frame have anything to release? */
  279.   		if(fp < ctx->used)

crypto/bn/bn_ctx.c:351:1: <LHS trace>
349.   	}
350.   
351. > static unsigned int BN_STACK_pop(BN_STACK *st)
352.   	{
353.   	return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:351:1: Parameter `st->depth`
    349.   	}
    350.   
    351. > static unsigned int BN_STACK_pop(BN_STACK *st)
    352.   	{
    353.   	return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:353:9: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    351.   static unsigned int BN_STACK_pop(BN_STACK *st)
    352.   	{
    353.   	return st->indexes[--(st->depth)];
                   ^
    354.   	}
    355.   

static unsigned int BN_STACK_pop(BN_STACK *st)
	{
	return st->indexes[--(st->depth)];
	}
['static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)\n\t{\n\tSW_CONTEXT_HANDLE hac;\n\tSW_PARAM sw_param;\n\tSW_STATUS sw_status;\n\tSW_LARGENUMBER arg, res;\n\tunsigned char *ptr;\n\tBN_CTX *ctx;\n\tBIGNUM *dsa_p = NULL;\n\tBIGNUM *dsa_q = NULL;\n\tBIGNUM *dsa_g = NULL;\n\tBIGNUM *dsa_key = NULL;\n\tBIGNUM *result = NULL;\n\tDSA_SIG *to_return = NULL;\n\tint acquired = 0;\n\tif((ctx = BN_CTX_new()) == NULL)\n\t\tgoto err;\n\tif(!get_context(&hac))\n\t\t{\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);\n\t\tgoto err;\n\t\t}\n\tacquired = 1;\n\tBN_CTX_start(ctx);\n\tdsa_p = BN_CTX_get(ctx);\n\tdsa_q = BN_CTX_get(ctx);\n\tdsa_g = BN_CTX_get(ctx);\n\tdsa_key = BN_CTX_get(ctx);\n\tresult = BN_CTX_get(ctx);\n\tif(!result)\n\t\t{\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);\n\t\tgoto err;\n\t\t}\n\tif(!bn_wexpand(dsa_p, dsa->p->top) ||\n\t\t\t!bn_wexpand(dsa_q, dsa->q->top) ||\n\t\t\t!bn_wexpand(dsa_g, dsa->g->top) ||\n\t\t\t!bn_wexpand(dsa_key, dsa->priv_key->top) ||\n\t\t\t!bn_wexpand(result, dsa->p->top))\n\t\t{\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);\n\t\tgoto err;\n\t\t}\n\tsw_param.type = SW_ALG_DSA;\n\tsw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,\n\t\t\t\t(unsigned char *)dsa_p->d);\n\tsw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;\n\tsw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,\n\t\t\t\t(unsigned char *)dsa_q->d);\n\tsw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;\n\tsw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,\n\t\t\t\t(unsigned char *)dsa_g->d);\n\tsw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;\n\tsw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,\n\t\t\t\t(unsigned char *)dsa_key->d);\n\tsw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;\n\tsw_status = p_CSwift_AttachKeyParam(hac, &sw_param);\n\tswitch(sw_status)\n\t\t{\n\tcase SW_OK:\n\t\tbreak;\n\tcase SW_ERR_INPUT_SIZE:\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);\n\t\tgoto err;\n\tdefault:\n\t\t{\n\t\tchar tmpbuf[DECIMAL_SIZE(sw_status)+1];\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);\n\t\tsprintf(tmpbuf, "%ld", sw_status);\n\t\tERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);\n\t\t}\n\t\tgoto err;\n\t\t}\n\targ.nbytes = dlen;\n\targ.value = (unsigned char *)dgst;\n\tres.nbytes = BN_num_bytes(dsa->p);\n\tmemset(result->d, 0, res.nbytes);\n\tres.value = (unsigned char *)result->d;\n\tsw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,\n\t\t&res, 1);\n\tif(sw_status != SW_OK)\n\t\t{\n\t\tchar tmpbuf[DECIMAL_SIZE(sw_status)+1];\n\t\tCSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);\n\t\tsprintf(tmpbuf, "%ld", sw_status);\n\t\tERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);\n\t\tgoto err;\n\t\t}\n\tptr = (unsigned char *)result->d;\n\tif((to_return = DSA_SIG_new()) == NULL)\n\t\tgoto err;\n\tto_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);\n\tto_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);\nerr:\n\tif(acquired)\n\t\trelease_context(hac);\n\tif(ctx)\n\t\t{\n\t\tBN_CTX_end(ctx);\n\t\tBN_CTX_free(ctx);\n\t\t}\n\treturn to_return;\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_GET,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}']