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params_from_user() may acquire tee_shm references for MEMREF parameters before failing after partially processing the supplied parameter array. In tee_ioctl_supp_recv(), those references are currently not released on that error path. Fix this by freeing MEMREF references before returning when params_from_user() fails. Keep the final cleanup path in tee_ioctl_supp_recv() unchanged since supp_recv() may consume and replace the supplied parameters, unlike the other TEE ioctl callback paths. Signed-off-by: Qihang <q.h.hack.winter@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>