Unknown parameters, especially structure padding, are expected to invoke
rejection with -EINVAL.

v2: similar issue exists for context-create

Testcase: igt/gem_ctx_create/invalid-pad
Testcase: igt/gem_ctx_bad_destroy/invalid-pad
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89602
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93999
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c 
b/drivers/gpu/drm/i915/i915_gem_context.c
index 54af654d04d6..c75d3468f29a 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -972,6 +972,9 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, 
void *data,
        if (!contexts_enabled(dev))
                return -ENODEV;
 
+       if (args->pad != 0)
+               return -EINVAL;
+
        ret = i915_mutex_lock_interruptible(dev);
        if (ret)
                return ret;
@@ -995,6 +998,9 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, 
void *data,
        struct intel_context *ctx;
        int ret;
 
+       if (args->pad != 0)
+               return -EINVAL;
+
        if (args->ctx_id == DEFAULT_CONTEXT_HANDLE)
                return -ENOENT;
 
-- 
2.7.0

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