tree 0762595cd37f50e4678a68304d443f2d518d394a
parent 1ce8e52f6f368f9d62b6320357bf7c26a1480ecb
author Stephan Mueller <smueller@chronox.de> 1514879725 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1517673934 +0100

crypto: af_alg - whitelist mask and type

commit bb30b8848c85e18ca7e371d0a869e94b3e383bdf upstream.

The user space interface allows specifying the type and mask field used
to allocate the cipher. Only a subset of the possible flags are intended
for user space. Therefore, white-list the allowed flags.

In case the user space caller uses at least one non-allowed flag, EINVAL
is returned.

Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>