rtac: add size check when reading cal data kvaddr buffer

Add size check to ensure cal data bytes size fits inside
the cal date when copying to user space buffer.

CRs-Fixed: 2110256
Bug: 65172622
Change-Id: I511999984684a9db4aaf1cf2c65eb1495c36980f
Signed-off-by: kunleiz <kunleiz@codeaurora.org>
Signed-off-by: Siqi Lin <siqilin@google.com>
CVE-2017-17769
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
(cherry picked from commit dc83a116dbcce645225673cf010195519f5eeea3)
1 file changed