tree c4c51d3a7394b26a4a57c473703ac3ac4c181f3d
parent 774cf4561cf2a3b1bd5e6cce399eb76a80afb74d
author Travis Geiselbrecht <travisg@google.com> 1537385704 -0700
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1537393781 +0000

[kernel][dev][intel-rng] fix buffer overflow bug

Noticed this while converting the file to cpp. The code to trim the
amount of memory to memcpy into the outgoing buffer would overflow by up
to 8 bytes per loop.

Never showed up before because the calling code for this either always
asks for a multiple of 8 or copies into a buffer that is at least a
multiple of 8.

Perhaps worth writing an in kernel unit test.

Change-Id: I4363f63360f121d444e4a6df9c8ead5de96b2a1b
Tested: build and verify that the copy does not overflow manually.