tree 1af4ccaa13998e773ff06969a8039ecc35e76785
parent 94e587f61ef5da3b4da40289cdb7e9a62d455313
author Heiko Carstens <heiko.carstens@de.ibm.com> 1263411883 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1263411886 +0100

[S390] zcrypt: add sanity check before copy_from_user()

It's not obvious that copy_from_user() is called with a sane length
parameter here. Even though it currently seems to be correct better
add a check to prevent stack corruption / exploits.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>