drm/amdgpu: add chunk id validity check

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 7cd567b..86b78c7 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -181,8 +181,6 @@ int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
                }
                p->chunks[i].chunk_id = user_chunk.chunk_id;
                p->chunks[i].length_dw = user_chunk.length_dw;
-               if (p->chunks[i].chunk_id == AMDGPU_CHUNK_ID_IB)
-                       p->num_ibs++;
 
                size = p->chunks[i].length_dw;
                cdata = (void __user *)(unsigned long)user_chunk.chunk_data;
@@ -199,7 +197,12 @@ int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
                        goto out;
                }
 
-               if (p->chunks[i].chunk_id == AMDGPU_CHUNK_ID_FENCE) {
+               switch (p->chunks[i].chunk_id) {
+               case AMDGPU_CHUNK_ID_IB:
+                       p->num_ibs++;
+                       break;
+
+               case AMDGPU_CHUNK_ID_FENCE:
                        size = sizeof(struct drm_amdgpu_cs_chunk_fence);
                        if (p->chunks[i].length_dw * sizeof(uint32_t) >= size) {
                                uint32_t handle;
@@ -221,6 +224,11 @@ int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
                                r = -EINVAL;
                                goto out;
                        }
+                       break;
+
+               default:
+                       r = -EINVAL;
+                       goto out;
                }
        }