Local information disclosure via incomplete RNG reads

Information disclosure in the Xilinx TRNG driver in Linux 6.18 allows local users to read unintended data via incomplete hardware RNG reads. In drivers/char/hw_random/xilinx-trng.c, xtrng_readblock32() suppresses initial polling errors, while xtrng_collect_random_data() copies tail bytes without respecting the amount produced, leaving gaps or copying unread buffer contents. Exposure requires the Versal hardware RNG driver and a timeout or partial read; public evidence does not establish attacker control over that condition or arbitrary code execution.