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Re: [libvirt] [PATCH] security: plug regression introduced in disk probe logic



2011/6/1 Eric Blake <eblake redhat com>:
> Regression introduced in commit d6623003 (v0.8.8) - using the
> wrong sizeof operand meant that security manager private data
> was overlaying the allowDiskFOrmatProbing member of struct

s/FOrmat/Format/

> _virSecurityManager.  This reopens disk probing, which was
> supposed to be prevented by the solution to CVE-2010-2238.
>
> * src/security/security_manager.c
> (virSecurityManagerGetPrivateData): Use correct offset.
> ---
>  src/security/security_manager.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/src/security/security_manager.c b/src/security/security_manager.c
> index 0246dd8..833c1a2 100644
> --- a/src/security/security_manager.c
> +++ b/src/security/security_manager.c
> @@ -107,7 +107,7 @@ virSecurityManagerPtr virSecurityManagerNew(const char *name,
>
>  void *virSecurityManagerGetPrivateData(virSecurityManagerPtr mgr)
>  {
> -    return ((char*)mgr) + sizeof(mgr);
> +    return ((char*)mgr) + sizeof(*mgr);
>  }

ACK.

Matthias


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