[PATCH] drm/i915/gvt: Fix the kernel null pointer error

[Zhenyu Wang]

On 2017.08.16 15:48:03 +0800, fred gao wrote:
> once error happens in shadow_indirect_ctx function, the variable
> wa_ctx->indirect_ctx.obj is not initialized but accessed, so the
> kernel null point panic occurs.
> 
> Fixes: 894cf7d15634 ("drm/i915/gvt: i915_gem_object_create() returns an error pointer")
> Cc: stable at vger.kernel.org # v4.8+
> Signed-off-by: fred gao <fred.gao at intel.com>
> ---
>  drivers/gpu/drm/i915/gvt/cmd_parser.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
> index 23a9bbb..2c0ccbb 100644
> --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
> +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
> @@ -2725,7 +2725,7 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx *wa_ctx)
>  unmap_src:
>  	i915_gem_object_unpin_map(obj);
>  put_obj:
> -	i915_gem_object_put(wa_ctx->indirect_ctx.obj);
> +	i915_gem_object_put(obj);
>  	return ret;
>  }
>  

applied for fixes, and pls don't forget to specify version next time, thx!

-- 
Open Source Technology Center, Intel ltd.

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