drm/amdgpu: fix memory overflow in the IB test

commit 6b0b7789a7a5f3e69185449f891beea58e563f9b upstream.

Fix a memory overflow issue in the gfx IB test
for some ASICs. At least 20 bytes are needed for
the IB test packet.

v2: correct code indentation errors. (Christian)

Signed-off-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 82e01bf..b346eb0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -398,7 +398,7 @@ static int gfx_v11_0_ring_test_ib(struct amdgpu_ring *ring, long timeout)
                adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
                cpu_ptr = &adev->wb.wb[index];
 
-               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) {
                        DRM_ERROR("amdgpu: failed to get ib (%ld).\n", r);
                        goto err1;

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 885ebd7..1943beb 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -883,8 +883,8 @@ static int gfx_v8_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;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index fd61574..2e23d08 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -1039,8 +1039,8 @@ static int gfx_v9_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;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
index 18ce5fe..e481ef7 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -296,8 +296,8 @@ static int gfx_v9_4_3_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;