Had no validation before. libdrm_amdgpu memsets this, even
for the raw/raw2 functions.

We have a lot of functions touching the ioctl struct, no
strong opinion on where this is placed, but I thought
early would be good.

Signed-off-by: Bas Nieuwenhuizen <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index b4f55f40ce0e..8d6f42e308fb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -185,6 +185,9 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
        int ret;
        int i;
 
+       if (cs->in.flags)
+               return -EINVAL;
+
        chunk_array = kvmalloc_array(cs->in.num_chunks, sizeof(uint64_t),
                                     GFP_KERNEL);
        if (!chunk_array)
-- 
2.45.2

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