[libvirt] [PATCH 1/2] virsh: check if domiftune parameters fit into UINT

[Ján Tomko]

We parse the bandwidth rates as unsinged long long,
then try to fit them in VIR_TYPED_PARAM_UINT.

Report an error if they exceed UINT_MAX instead of
quietly using wrong values.

https://bugzilla.redhat.com/show_bug.cgi?id=1043735
---
 tools/virsh-domain.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index ad68aab..f7193cb 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -2686,6 +2686,14 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd)
             vshError(ctl, _("inbound format is incorrect"));
             goto cleanup;
         }
+        /* we parse the rate as unsigned long long, but the API
+         * only accepts UINT */
+        if (inbound.average > UINT_MAX || inbound.peak > UINT_MAX ||
+            inbound.burst > UINT_MAX) {
+            vshError(ctl, _("inbound rate larger than maximum %u"),
+                     UINT_MAX);
+            goto cleanup;
+        }
         if (inbound.average == 0 && (inbound.burst || inbound.peak)) {
             vshError(ctl, _("inbound average is mandatory"));
             goto cleanup;
@@ -2714,6 +2722,12 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd)
             vshError(ctl, _("outbound format is incorrect"));
             goto cleanup;
         }
+        if (outbound.average > UINT_MAX || outbound.peak > UINT_MAX ||
+            outbound.burst > UINT_MAX) {
+            vshError(ctl, _("outbound rate larger than maximum %u"),
+                     UINT_MAX);
+            goto cleanup;
+        }
         if (outbound.average == 0 && (outbound.burst || outbound.peak)) {
             vshError(ctl, _("outbound average is mandatory"));
             goto cleanup;
-- 
1.8.5.5