From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-pra...@amd.com>
[ Upstream commit fec5f8e8c6bcf83ed7a392801d7b44c5ecfc1e82 ]
Before this commit, only submits with both a BO_HANDLES chunk and a
'bo_list_handle' would be rejected (by amdgpu_cs_parser_bos).
But if UMD sent multiple BO_HANDLES, what would happen is:
* only the last one would be really used
* all the others would leak memory as amdgpu_cs_p1_bo_handles would
overwrite the previous p->bo_list value
This commit rejects submissions with multiple BO_HANDLES chunks to
match the implementation of the parser.
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-pra...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 6dfdff58bffd1..78b3c067fea7e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -263,6 +263,10 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
if (size < sizeof(struct drm_amdgpu_bo_list_in))
goto free_partial_kdata;
+ /* Only a single BO list is allowed to simplify
handling. */
+ if (p->bo_list)
+ ret = -EINVAL;
+
ret = amdgpu_cs_p1_bo_handles(p, p->chunks[i].kdata);
if (ret)
goto free_partial_kdata;
--
2.43.0
