Re: [Xen-devel] [PATCH 4 of 7 v2] x86: fix memset(ptr, 0, sizeof ptr)

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.04.12 at 17:51, Tim Deegan <tim@xxxxxxx> wrote:
> # HG changeset patch
> # User Tim Deegan <tim@xxxxxxx>
> # Date 1333640955 -3600
> # Node ID a93381049790e4f8a02f2322851f78175c254c5b
> # Parent  4674ce03c62a3e916954fd445b4510ffe72e64f4
> x86: fix memset(ptr, 0, sizeof ptr).
> 
> Signed-off-by: Tim Deegan <tim@xxxxxxx>

Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

> diff -r 4674ce03c62a -r a93381049790 xen/arch/x86/cpu/mcheck/amd_f10.c
> --- a/xen/arch/x86/cpu/mcheck/amd_f10.c       Thu Apr 05 16:49:15 2012 +0100
> +++ b/xen/arch/x86/cpu/mcheck/amd_f10.c       Thu Apr 05 16:49:15 2012 +0100
> @@ -73,9 +73,9 @@ amd_f10_handler(struct mc_info *mi, uint
>               return NULL;
>       }
>  
> -     memset(mc_ext, 0, sizeof(mc_ext));
> +     memset(mc_ext, 0, sizeof(*mc_ext));
>       mc_ext->common.type = MC_TYPE_EXTENDED;
> -     mc_ext->common.size = sizeof(mc_ext);
> +     mc_ext->common.size = sizeof(*mc_ext);
>       mc_ext->mc_msrs = 3;
>  
>       mc_ext->mc_msr[0].reg = MSR_F10_MC4_MISC1;
> diff -r 4674ce03c62a -r a93381049790 xen/arch/x86/mm/p2m.c
> --- a/xen/arch/x86/mm/p2m.c   Thu Apr 05 16:49:15 2012 +0100
> +++ b/xen/arch/x86/mm/p2m.c   Thu Apr 05 16:49:15 2012 +0100
> @@ -1232,11 +1232,10 @@ bool_t p2m_mem_access_check(unsigned lon
>      }
>  
>      *req_ptr = NULL;
> -    req = xmalloc(mem_event_request_t);
> +    req = xzalloc(mem_event_request_t);
>      if ( req )
>      {
>          *req_ptr = req;
> -        memset(req, 0, sizeof(req));
>          req->reason = MEM_EVENT_REASON_VIOLATION;
>  
>          /* Pause the current VCPU */
> 
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> http://lists.xen.org/xen-devel 




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