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| author | Alex Deucher <alexander.deucher@amd.com> | 2016-08-24 12:31:36 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-08-24 14:04:24 -0400 |
| commit | e1718d97aa88ea44a6a8f50ff464253dd0dacf01 (patch) | |
| tree | d168d3c0c61ff0c9874566111bc2d6aa74ce63ee /drivers/gpu | |
| parent | 5661538749511d4c2f7d33e1e179f10c545b24d5 (diff) | |
| download | linux-0-day-e1718d97aa88ea44a6a8f50ff464253dd0dacf01.tar.gz linux-0-day-e1718d97aa88ea44a6a8f50ff464253dd0dacf01.tar.xz | |
drm/amdgpu: avoid a possible array overflow
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>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 6 |
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 983175363b068..151422307d317 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; |