drm/i915/gvt: Fix the kernel null pointer error

commit ffeaf9aaf97b4bdaf114d6df52f800d71918768c upstream.

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")
Signed-off-by: fred gao <fred.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index 41b2c3aaa04a5ab82fd72da44369a78b15a0dfa4..37258b7d1bce3371b1f1962f806f0b7b00e0ea72 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -2754,7 +2754,7 @@ 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;
 }