tree cbeb3d328b71c83c4d84dec131abec09d2ccff7f
parent 19ced623db2fe91604d69f7d86b03144c5107739
author Mathias Krause <minipli@googlemail.com> 1466620177 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> 1466674765 +0800

crypto: user - re-add size check for CRYPTO_MSG_GETALG

Commit 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
accidentally removed the minimum size check for CRYPTO_MSG_GETALG
netlink messages. This allows userland to send a truncated
CRYPTO_MSG_GETALG message as short as a netlink header only making
crypto_report() operate on uninitialized memory by accessing data
beyond the end of the netlink message.

Fix this be re-adding the minimum required size of CRYPTO_MSG_GETALG
messages to the crypto_msg_min[] array.

Fixes: 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
Cc: stable@vger.kernel.org	# v4.2
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>