Commit 428f273c authored by Haohui Mai's avatar Haohui Mai Committed by Alex Deucher
Browse files

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



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: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarHaohui Mai <ricetons@gmail.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ca5d251b

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

+1 −2
Original line number Diff line number Diff line
@@ -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;