Re: [PATCH] x86/hvm_event: fix uninitialized struct field usage introduced by c/s f5365e6

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 18/02/16 10:45, Corneliu ZUZU wrote:
> c/s f5365e6: "xen/vm-events: Move parts of monitor_domctl code to common-side",
> introduced a use without initialization issue.
> hvm_event_breakpoint calls hvm_event_traps(&req) and if sync is true that
> ors some bits into req->flags which was never initialised.
> Reported by Coverity Scan.
>
> Initializes req @ hvm_event_breakpoint entry.

Coverity-ID: 1353192

> Signed-off-by: Corneliu ZUZU <czuzu@bitdefender.com>

Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

> ---
>  xen/arch/x86/hvm/event.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/xen/arch/x86/hvm/event.c b/xen/arch/x86/hvm/event.c
> index 874a36c..cb9c152 100644
> --- a/xen/arch/x86/hvm/event.c
> +++ b/xen/arch/x86/hvm/event.c
> @@ -173,7 +173,7 @@ int hvm_event_breakpoint(unsigned long rip,
>  {
>      struct vcpu *curr = current;
>      struct arch_domain *ad = &curr->domain->arch;
> -    vm_event_request_t req;
> +    vm_event_request_t req = {};
>  
>      switch ( type )
>      {