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authorAlex Deucher <alexander.deucher@amd.com>2016-08-24 12:31:36 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-07 08:32:42 +0200
commit9c22155c5a39dc452c59534195712f57f512b063 (patch)
tree25df33d97a1cf57a22529c345c68197c1807c277 /drivers/gpu/drm/amd
parent65317dbcf37367350276967ff9e3b4647054cb64 (diff)
drm/amdgpu: avoid a possible array overflow
commit e1718d97aa88ea44a6a8f50ff464253dd0dacf01 upstream. 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. Workaround for bug: https://bugs.freedesktop.org/show_bug.cgi?id=97460 Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 0aaa457a1710..7c9848c9b71c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -331,6 +331,12 @@ 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;