Am 24.08.2016 um 18:34 schrieb Alex Deucher:
When looking up the connector type make sure the index
is valid. Avoids a later crash if we read past the end
of the array.
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>.
Cc: sta...@vger.kernel.org
---
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 9831753..1514223 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -321,6 +321,12 @@ bool
amdgpu_atombios_get_connector_info_from_object_table(struct amdgpu_device *
(le16_to_cpu(path->usConnObjectId) &
OBJECT_TYPE_MASK) >> OBJECT_TYPE_SHIFT;
+ if (con_obj_id >= ARRAY_SIZE(object_connector_convert)) {
+ DRM_ERROR("invalid con_obj_id %d for device tag
0x%04x\n",
+ con_obj_id,
le16_to_cpu(path->usDeviceTag));
+ continue;
+ }
+
connector_type =
object_connector_convert[con_obj_id];
connector_object_id = con_obj_id;
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