The fuzzer plugins for libcamera_client are designed based on the understanding of the source code and try to achieve the following:
The configuration parameters are not hardcoded, but instead selected based on incoming data. This ensures more code paths are reached by the fuzzers.
libcamera_client supports the following parameters:
cmd
)videoBufferMode
)previewCallbackFlag
)facing
)orientation
)format
)Parameter | Valid Values | Configured Value |
---|---|---|
cmd | 0.CAMERA_CMD_START_SMOOTH_ZOOM 1.CAMERA_CMD_STOP_SMOOTH_ZOOM 3.CAMERA_CMD_SET_DISPLAY_ORIENTATION 4.CAMERA_CMD_ENABLE_SHUTTER_SOUND 5.CAMERA_CMD_PLAY_RECORDING_SOUND 6.CAMERA_CMD_START_FACE_DETECTION 7.CAMERA_CMD_STOP_FACE_DETECTION 8.CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG 9.CAMERA_CMD_PING 10.CAMERA_CMD_SET_VIDEO_BUFFER_COUNT 11.CAMERA_CMD_SET_VIDEO_FORMAT | Value obtained from FuzzedDataProvider |
videoBufferMode | 0. ICamera::VIDEO_BUFFER_MODE_DATA_CALLBACK_YUV 1.ICamera::VIDEO_BUFFER_MODE_DATA_CALLBACK_METADATA 2.ICamera::VIDEO_BUFFER_MODE_BUFFER_QUEUE | Value obtained from FuzzedDataProvider |
previewCallbackFlag | 0. CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK 1.CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK 2.CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK 3.CAMERA_FRAME_CALLBACK_FLAG_NOOP 4.CAMERA_FRAME_CALLBACK_FLAG_CAMCORDER 5.CAMERA_FRAME_CALLBACK_FLAG_CAMERA 6.CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER | Value obtained from FuzzedDataProvider |
facing | 0.android::hardware::CAMERA_FACING_BACK 1.android::hardware::CAMERA_FACING_FRONT | Value obtained from FuzzedDataProvider |
orientation | 0.0 1.90 2.180 3.270 | Value obtained from FuzzedDataProvider |
format | 0.CameraParameters::PIXEL_FORMAT_YUV422SP 1.CameraParameters::PIXEL_FORMAT_YUV420SP 2.CameraParameters::PIXEL_FORMAT_YUV422I 3.CameraParameters::PIXEL_FORMAT_YUV420P 4.CameraParameters::PIXEL_FORMAT_RGB565 5.CameraParameters::PIXEL_FORMAT_RGBA8888 6.CameraParameters::PIXEL_FORMAT_JPEG 7.CameraParameters::PIXEL_FORMAT_BAYER_RGGB 8.CameraParameters::PIXEL_FORMAT_ANDROID_OPAQUE | Value obtained from FuzzedDataProvider |
This also ensures that the plugins are always deterministic for any given input.
The plugins feed the entire input data to the module.
This ensures that the plugins tolerate any kind of input (empty, huge,
malformed, etc) and dont exit()
on any input and thereby increasing the
chance of identifying vulnerabilities.
This describes steps to build camera_fuzzer, camera2CaptureRequest_fuzzer, camera2ConcurrentCamera_fuzzer, camera2SubmitInfo_fuzzer, camera2SessionConfiguration_fuzzer, camera2OutputConfiguration_fuzzer, vendorTagDescriptor_fuzzer, cameraParameters_fuzzer, cameraSessionStats_fuzzer and captureResult_fuzzer binaries
Build the fuzzer
$ mm -j$(nproc) camera_fuzzer
$ mm -j$(nproc) camera_c2CaptureRequest_fuzzer
$ mm -j$(nproc) camera_c2ConcurrentCamera_fuzzer
$ mm -j$(nproc) camera_c2SubmitInfo_fuzzer
$ mm -j$(nproc) camera_c2SessionConfiguration_fuzzer
$ mm -j$(nproc) camera_c2OutputConfiguration_fuzzer
$ mm -j$(nproc) camera_vendorTagDescriptor_fuzzer
$ mm -j$(nproc) camera_Parameters_fuzzer
$ mm -j$(nproc) camera_SessionStats_fuzzer
$ mm -j$(nproc) camera_captureResult_fuzzer
To run on device
$ adb sync data
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_fuzzer/camera_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_c2CaptureRequest_fuzzer/camera_c2CaptureRequest_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_c2ConcurrentCamera_fuzzer/camera_c2ConcurrentCamera_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_c2SubmitInfo_fuzzer/camera_c2SubmitInfo_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_c2SessionConfiguration_fuzzer/camera_c2SessionConfiguration_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_c2OutputConfiguration_fuzzer/camera_c2OutputConfiguration_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_vendorTagDescriptor_fuzzer/camera_vendorTagDescriptor_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_Parameters_fuzzer/camera_Parameters_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_SessionStats_fuzzer/camera_SessionStats_fuzzer
$ adb shell /data/fuzz/${TARGET_ARCH}/camera_captureResult_fuzzer/camera_captureResult_fuzzer