From: Young Xiao <YangX92@xxxxxxxxxxx>
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.
See commit e1718d97aa88 ("drm/amdgpu: avoid a possible
array overflow") for detail.
Signed-off-by: Young Xiao <YangX92@xxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_atombios.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index f422a8d..9121961 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -583,6 +583,12 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
ATOM_DEVICE_CV_SUPPORT)
continue;
+ 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;
+ }
+
/* IGP chips */
if ((rdev->flags & RADEON_IS_IGP) &&
(con_obj_id ==
--
2.7.4
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