[libvirt] [PATCH] qemu: Avoid parsing empty nodeset string

Nitesh Konkar posted 1 patch 6 years, 10 months ago
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/20170614153219.12217-1-niteshkonkar.libvirt@gmail.com
src/qemu/qemu_process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
[libvirt] [PATCH] qemu: Avoid parsing empty nodeset string
Posted by Nitesh Konkar 6 years, 10 months ago
The advisory nodeset from numad is parsed irrespective of
the string being empty or not. Avoid parsing an empty nodeset
string.

Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
---
 src/qemu/qemu_process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 85b800d..1c49fa6 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -5456,7 +5456,7 @@ qemuProcessPrepareDomain(virConnectPtr conn,
         if (virDomainDefNeedsPlacementAdvice(vm->def)) {
             nodeset = virNumaGetAutoPlacementAdvice(virDomainDefGetVcpus(vm->def),
                                                     virDomainDefGetMemoryTotal(vm->def));
-            if (!nodeset)
+            if (virStringIsEmpty(nodeset))
                 goto cleanup;
 
             VIR_DEBUG("Nodeset returned from numad: %s", nodeset);
-- 
2.9.4

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Re: [libvirt] [PATCH] qemu: Avoid parsing empty nodeset string
Posted by Jiri Denemark 6 years, 10 months ago
On Wed, Jun 14, 2017 at 21:02:19 +0530, Nitesh Konkar wrote:
> The advisory nodeset from numad is parsed irrespective of
> the string being empty or not. Avoid parsing an empty nodeset
> string.
> 
> Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
> ---
>  src/qemu/qemu_process.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
> index 85b800d..1c49fa6 100644
> --- a/src/qemu/qemu_process.c
> +++ b/src/qemu/qemu_process.c
> @@ -5456,7 +5456,7 @@ qemuProcessPrepareDomain(virConnectPtr conn,
>          if (virDomainDefNeedsPlacementAdvice(vm->def)) {
>              nodeset = virNumaGetAutoPlacementAdvice(virDomainDefGetVcpus(vm->def),
>                                                      virDomainDefGetMemoryTotal(vm->def));
> -            if (!nodeset)
> +            if (virStringIsEmpty(nodeset))
>                  goto cleanup;
>  
>              VIR_DEBUG("Nodeset returned from numad: %s", nodeset);

virNumaGetAutoPlacementAdvice returns NULL on error, any other value is
considered success. Thus this change could cause a jump to the cleanup
label and returning error from qemuProcessPrepareDomain without setting
any error.

NACK

Jirka

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