From d3c87884927e6b745d0a5680e6d94a40c4f484f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Mon, 24 Jun 2013 14:18:14 +0200
Subject: [PATCH] qemu: check if block I/O limits fit into long long

We can only pass values up to LLONG_MAX through JSON
and QEMU checks if the int64_t number is not negative
at startup since 1.5.0.

https://bugzilla.redhat.com/show_bug.cgi?id=974010
---
 src/qemu/qemu_driver.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 3d9457f00f..b4b66aa808 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -14099,6 +14099,13 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
     for (i = 0; i < nparams; i++) {
         virTypedParameterPtr param = &params[i];
 
+        if (param->value.ul > LLONG_MAX) {
+            virReportError(VIR_ERR_OVERFLOW,
+                           _("block I/O throttle limit value must"
+                             " be less than %llu"), LLONG_MAX);
+            goto endjob;
+        }
+
         if (STREQ(param->field, VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC)) {
             info.total_bytes_sec = param->value.ul;
             set_bytes = true;
-- 
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