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camerad: sanity check register data before parsing (#24547)

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This commit is contained in:
Willem Melching
2022-05-16 13:19:06 +02:00
committed by GitHub
parent f16e30a44f
commit 1dcd5096ba
1 changed files with 7 additions and 0 deletions
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selfdrive/camerad/cameras/camera_qcom2.cc
+7
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@@ -1196,7 +1196,14 @@ static float ar0231_parse_temp_sensor(uint16_t calib1, uint16_t calib2, uint16_t
}
static void ar0231_process_registers(MultiCameraState *s, CameraState *c, cereal::FrameData::Builder &framed){
const uint8_t expected_preamble[] = {0x0a, 0xaa, 0x55, 0x20, 0xa5, 0x55};
uint8_t *data = (uint8_t*)c->buf.cur_camera_buf->addr + c->ci.registers_offset;
if (memcmp(data, expected_preamble, std::size(expected_preamble)) != 0){
LOGE("unexpected register data found");
return;
}
auto registers = c->ar0231_parse_registers(data, {0x2000, 0x2002, 0x20b0, 0x20b2, 0x30c6, 0x30c8, 0x30ca, 0x30cc});
uint32_t frame_id = ((uint32_t)registers[0x2000] << 16) | registers[0x2002];