qemu: Validate QoS values in qemuDomainSetInterfaceParameters()

[PATCH] qemu: Validate QoS values in qemuDomainSetInterfaceParameters()

Posted by Michal Privoznik 1 week, 2 days ago

This is similar to one of my previous commits (v10.7.0-rc1~22)
which introduce a check that <bandwidth/> values fit into certain
limits. My original commit validated values when parsing
<bandwidth/> XML, but completely missed the case when values are
set over virDomainSetInterfaceParameters() API.

Solution is simple - just perform validation after bandwidth
structure is reconstructed from arguments passed to the API.

Resolves: https://issues.redhat.com/browse/RHEL-65372
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
 src/qemu/qemu_driver.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d1b32de56a..09f7edda7d 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -9883,6 +9883,9 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom,
     if (!bandwidth->out->average)
         VIR_FREE(bandwidth->out);
 
+    if (!virNetDevBandwidthValidate(bandwidth))
+        goto endjob;
+
     if (net) {
         newBandwidth = g_new0(virNetDevBandwidth, 1);
 
-- 
2.45.2

Re: [PATCH] qemu: Validate QoS values in qemuDomainSetInterfaceParameters()

Posted by Jiri Denemark 1 week, 2 days ago

On Wed, Nov 27, 2024 at 12:30:05 +0100, Michal Privoznik wrote:
> This is similar to one of my previous commits (v10.7.0-rc1~22)
> which introduce a check that <bandwidth/> values fit into certain

s/introduce/introduced/

> limits. My original commit validated values when parsing
> <bandwidth/> XML, but completely missed the case when values are
> set over virDomainSetInterfaceParameters() API.
> 
> Solution is simple - just perform validation after bandwidth
> structure is reconstructed from arguments passed to the API.
> 
> Resolves: https://issues.redhat.com/browse/RHEL-65372
> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
> ---
>  src/qemu/qemu_driver.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
> index d1b32de56a..09f7edda7d 100644
> --- a/src/qemu/qemu_driver.c
> +++ b/src/qemu/qemu_driver.c
> @@ -9883,6 +9883,9 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom,
>      if (!bandwidth->out->average)
>          VIR_FREE(bandwidth->out);
>  
> +    if (!virNetDevBandwidthValidate(bandwidth))
> +        goto endjob;
> +
>      if (net) {
>          newBandwidth = g_new0(virNetDevBandwidth, 1);
>  

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>