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[S390] zcrypt: add sanity check before copy_from_user()
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Wed, 13 Jan 2010 19:44:43 +0000 (20:44 +0100)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Wed, 13 Jan 2010 19:44:46 +0000 (20:44 +0100)
commit0648f5659e2d51659bd8f42ff30f456775c3c12d
tree1af4ccaa13998e773ff06969a8039ecc35e76785tree | snapshot (tar.gz zip)
parent94e587f61ef5da3b4da40289cdb7e9a62d455313commit | diff
[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>
drivers/s390/crypto/zcrypt_api.c diff | blob | blame | history