lkml.org 
[lkml]   [2010]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] gpu: drm: vmwgfx: fix information leak to userland
On 11/06/2010 03:41 PM, Vasiliy Kulikov wrote:
> Structure drm_vmw_fence_rep is copied to userland with field "pad64"
> uninitialized. It leads to leaking of contents of kernel stack memory.
>
> Signed-off-by: Vasiliy Kulikov<segooon@gmail.com>
> ---
> Compile tested.
>
> drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> index 51d9f9f..76954e3 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> @@ -691,6 +691,7 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
>
> fence_rep.error = ret;
> fence_rep.fence_seq = (uint64_t) sequence;
> + fence_rep.pad64 = 0;
>
> user_fence_rep = (struct drm_vmw_fence_rep __user *)
> (unsigned long)arg->fence_rep;
>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>



\
 
 \ /
  Last update: 2010-11-08 16:43    [W:0.030 / U:0.484 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site