[libvirt] [PATCH] conf: Fix invalid pointer check in virDomainObjGetDefs

[John Ferlan]

On 06/04/2015 07:28 AM, Peter Krempa wrote:
> Coverity rightfully determined that in commit 3d021381c71221e563182f03
> I made a mistake in the first check if @persDef is not NULL is
> dereferencing it rather than checking.
> ---
> 
> Pushed as trivial.
> 
>  src/conf/domain_conf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 77e198c..68d28f6 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -2927,7 +2927,7 @@ virDomainObjGetDefs(virDomainObjPtr vm,
>      if (liveDef)
>          *liveDef = NULL;
> 
> -    if (*persDef)
> +    if (persDef)
>          *persDef = NULL;
> 
>      if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
> 


yes - this makes Coverity happy... Still curious about :

+    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        if (liveDef)
+            *liveDef = vm->def;
+
+        if (persDef)
+            *liveDef = vm->newDef;


Coverity doesn't flag the second *liveDef setting, but from just reading
the code it seems if NULL is passed for liveDef and something is passed
for persDef, then we could run into an issue here deref'ing liveDef

John