[libvirt] [PATCH] virsh: forbid negative vcpu argument to vcpupin.

[Jincheng Miao]

vcpupin will allow argument --vcpu as a signed number,
and pass it to virDomainPinVcpu directlly without
checking if this value is positive(valid).

> virsh vcpupin r7 -1 0
error: numerical overflow: input too large: 4294967295

This message is inaccurate, and the negative vcpu is
non-valuable. So forbid vcpu argument as a negative.

Signed-off-by: Jincheng Miao <jmiao at redhat.com>
---
 tools/virsh-domain.c |   24 ++++++++++--------------
 1 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 84a6706..d9804cc 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -5797,7 +5797,7 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
 {
     virDomainInfo info;
     virDomainPtr dom;
-    int vcpu = -1;
+    unsigned int vcpu;
     const char *cpulist = NULL;
     bool ret = false;
     unsigned char *cpumap = NULL;
@@ -5830,29 +5830,25 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
 
     query = !cpulist;
 
-    /* In query mode, "vcpu" is optional */
-    if (vshCommandOptInt(cmd, "vcpu", &vcpu) < !query) {
+    /* In query mode, "vcpu" is optional*/
+    if (vshCommandOptUInt(cmd, "vcpu", &vcpu) < !query) {
         vshError(ctl, "%s",
                  _("vcpupin: Invalid or missing vCPU number."));
-        virDomainFree(dom);
-        return false;
-    }
-
-    if ((maxcpu = vshNodeGetCPUCount(ctl->conn)) < 0) {
-        virDomainFree(dom);
-        return false;
+        goto cleanup;
     }
 
     if (virDomainGetInfo(dom, &info) != 0) {
         vshError(ctl, "%s", _("vcpupin: failed to get domain information."));
-        virDomainFree(dom);
-        return false;
+        goto cleanup;
     }
 
     if (vcpu >= info.nrVirtCpu) {
         vshError(ctl, "%s", _("vcpupin: Invalid vCPU number."));
-        virDomainFree(dom);
-        return false;
+        goto cleanup;
+    }
+
+    if ((maxcpu = vshNodeGetCPUCount(ctl->conn)) < 0) {
+        goto cleanup;
     }
 
     cpumaplen = VIR_CPU_MAPLEN(maxcpu);
-- 
1.7.1