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drm/amdgpu: Fix out-of-bound access for gfx_v10_0_ring_test_ib()

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The gfx_v10_0_ring_test_ib() function uses 20 bytes instead of 16
bytes during the test. The patch sets the size of the allocation to be
4-byte larger to match the actual usage.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Haohui Mai <ricetons@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Haohui Mai 2022-04-25 16:56:05 +08:00 committed by Alex Deucher
parent ca5d251b3b
commit 428f273cbb
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
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@ -3830,8 +3830,7 @@ static int gfx_v10_0_ring_test_ib(struct amdgpu_ring *ring, long timeout)
gpu_addr = adev->wb.gpu_addr + (index * 4);
adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
memset(&ib, 0, sizeof(ib));
r = amdgpu_ib_get(adev, NULL, 16,
AMDGPU_IB_POOL_DIRECT, &ib);
r = amdgpu_ib_get(adev, NULL, 20, AMDGPU_IB_POOL_DIRECT, &ib);
if (r)
goto err1;